Sinodrills Development

from its establishment to the present

Guizhou Sinodrills Equipment Co., LTD (hereinafter referred to as Sinodrills) is an international market-oriented enterprise dedicated to providing a comprehensive solution for rock drilling tools. Its predecessor, DVY International, was established in 2002 and was registered as Guizhou Sinodrills Equipment Co., LTD in 2006. After over two decades of development, Sinodrills has evolved into a professional rock drilling tool supplier integrating research and development, production, and sales. Sinodrills owns two production enterprises: Wuxue Zhong’e Machinery Equipment Co., Ltd. and Wuxue Xinchuan New Materials Co., Ltd., among which Wuxue Xinchuan New Materials Co., Ltd. is a national high-tech certified enterprise. Sinodrills is committed to providing a one-stop solution for rock drilling tools, with its products covering 4 series:

• Top-hammer drilling tools,

• Down-the-hole (DTH) drilling tools

• Geotechnical drilling tools

• Rotary drilling tools.

Sinodrills strictly adheres to the ISO9001 international quality management system and consistently upholds the principle of integrity in business operations. Since 2016, it has been recognized as a 3A enterprise by the internationally renowned credit rating agency Dun & Bradstreet. Sinodrills places innovation at the core of its business, continuously improving product quality to create more value for customers. By the end of 2023, Sinodrills had obtained more than 20 patents and has been increasing its R & D investment year by year.

Since its establishment, Sinodrills has been focusing on the mid-to-high-end international markets. By the end of 2023, its products had been exported to 110 countries and regions around the world, with its export volume in 2023 ranking first in China (certified by Euromonitor International in March 2024). As of August 2024, Sinodrills, as the leading brand of rock drilling tools in China, has been registered in 120 countries or regions worldwide.

Our mission: Take Chinese rock drilling tools to the world and earn global trust in Sino-quality;

Our vision: Make Sinodrills rock drilling tools a global bestseller and achieve annual sales of over 100 million US dollars.

Our Values: Customer satisfaction and repeat business are the only standards for our work.

There are three methods for inserting carbide buttons: copper brazing, cold press, and hot press.

1. Copper Brazing:

Copper brazing is the earliest way of inserting carbide buttons, primarily determining the size of the hole and the carbide button based on the gap during brazing. According to the bit skirt structure, corresponding button holes are drilled into the bit skirt, and then the carbide buttons are welded into the bit skirt using copper or silver welding techniques.

This method does not require high precision for the drilling or button size. During brazing, the brazing material is placed at the bottom of the carbide button, with some flux sprinkled on the carbide button surface. The brazing material diffuses fully in an oxygen-free condition, forming a dense, uniform, and full weld. The hole only bears the radial and tangential stresses caused by the condensation shrinkage of the weld, with no axial tensile or compressive stress. Additionally, this layer of brazing material can delay the impact during rock drilling, thus avoiding the disadvantages of interference fit.

However, the high temperatures during welding impose thermal stresses, potentially causing defects and micro-crack propagation in the low cobalt alloy, as well as reduced hardness  (by HRC  0.5-0.8 ) and bending strength (by 8%-20%) of the carbide. The formation of an oxide layer on the surface of the alloy button makes the carbide button prone to fracture.

Currently, this method is mainly used for single used button bits, such as blast furnace tapping bits and anchor bits.

2.  Cold Press V.S Hot Press

Cold press and hot press both utilize interference fit to fix the carbide buttons, and the interference is generally between 0.04mm and 0.08mm. Factors influencing the interference include, but are not limited to:

1. Drill bit skirt material;

2. Heat treatment process of the skirt;

3. Diameter of the carbide buttons;

4. The equipment for inserting carbide buttons into the bit skirt.

Cold press is done at room temperature, without the need to heat the button bit, directly using a hydraulic hammer to press the carbide buttons firmly into the button bit.

This process has a lower production cost but lacks stability.

Improper selection of interference can significantly increase the pressing force, sometimes causing the carbide and the hole to be damaged. Even with appropriate interference, the tangential, axial, and radial stresses experienced by the carbide button under heavy loads can accelerate the expansion of existing defects, leading to premature damage to the carbide buttons.

The overall lifespan of cold pressed button bits is limited, particularly in the late drilling stage of button bits, and issues such as buttons popping out or breakage are common.

Cold pressed button bit is generally used for softer, less abrasive rock formation, and higher-end anchor bits often utilize this method.

Unlike cold press, the hot press process takes advantage of the principle of thermal expansion and contraction. It involves heating the bit skirt to a certain temperature, typically between 200°C and 500°C, to expand the diameter of the button holes. Then, the carbide button is inserted into the hole and physically contracted to tightly integrate the buttons with the bit skirt.

This method does not necessitate pressure, or only minimal pressure, thereby avoiding or reducing the impact on the performance of the carbide buttons, making it more effective in maintaining the original properties of the carbide buttons.

Hot press is currently the best and mainstream method for inserting carbide buttons. Hot pressed button bits have better wear resistance, higher hardness, and superior stability, suitable for very hard and highly abrasive rock formation.

As the leading exporter of rock drilling tools in China, Sinodrills’ threaded button bits and down-the-hole button bits are all hot pressed, offering long service life, greater wear resistance, and excellent stability!

There are three methods for inserting carbide buttons: copper brazing, cold press, and hot press.

1.Copper Brazing:

Copper brazing is the earliest way of inserting carbide buttons, primarily determining the size of the hole and the carbide button based on the gap during brazing. According to the bit skirt structure, corresponding button holes are drilled into the bit skirt, and then the carbide buttons are welded into the bit skirt using copper or silver welding techniques. 

This method does not require high precision for the drilling or button size. During brazing, the brazing material is placed at the bottom of the carbide button, with some flux sprinkled on the carbide button surface. The brazing material diffuses fully in an oxygen-free condition, forming a dense, uniform, and full weld. The hole only bears the radial and tangential stresses caused by the condensation shrinkage of the weld, with no axial tensile or compressive stress. Additionally, this layer of brazing material can delay the impact during rock drilling, thus avoiding the disadvantages of interference fit. 

However, the high temperatures during welding impose thermal stresses, potentially causing defects and micro-crack propagation in the low cobalt alloy, as well as reduced hardness  (by HRC  0.5-0.8 ) and bending strength (by 8%-20%) of the carbide. The formation of an oxide layer on the surface of the alloy button makes the carbide button prone to fracture. 

Currently, this method is mainly used for single used button bits, such as blast furnace tapping bits and anchor bits.

2.  Cold Press V.S Hot Press

Cold press and hot press both utilize interference fit to fix the carbide buttons, and the interference is generally between 0.04mm and 0.08mm. Factors influencing the interference include, but are not limited to: 

1. Drill bit skirt material; 

2. Heat treatment process of the skirt; 

3. Diameter of the carbide buttons; 

4. The equipment for inserting carbide buttons into the bit skirt. 

Cold press is done at room temperature, without the need to heat the button bit, directly using a hydraulic hammer to press the carbide buttons firmly into the button bit. 

This process has a lower production cost but lacks stability.

Improper selection of interference can significantly increase the pressing force, sometimes causing the carbide and the hole to be damaged. Even with appropriate interference, the tangential, axial, and radial stresses experienced by the carbide button under heavy loads can accelerate the expansion of existing defects, leading to premature damage to the carbide buttons. 

The overall lifespan of cold pressed button bits is limited, particularly in the late drilling stage of button bits, and issues such as buttons popping out or breakage are common. 

Cold pressed button bit is generally used for softer, less abrasive rock formation, and higher-end anchor bits often utilize this method.

Unlike cold press, the hot press process takes advantage of the principle of thermal expansion and contraction. It involves heating the bit skirt to a certain temperature, typically between 200°C and 500°C, to expand the diameter of the button holes. Then, the carbide button is inserted into the hole and physically contracted to tightly integrate the buttons with the bit skirt. 

This method does not necessitate pressure, or only minimal pressure, thereby avoiding or reducing the impact on the performance of the carbide buttons, making it more effective in maintaining the original properties of the carbide buttons.

Hot press is currently the best and mainstream method for inserting carbide buttons. Hot pressed button bits have better wear resistance, higher hardness, and superior stability, suitable for very hard and highly abrasive rock formation.

As the leading exporter of rock drilling tools in China, Sinodrills’ threaded button bits and down-the-hole button bits are all hot pressed, offering long service life, greater wear resistance, and excellent stability!

SINODRILLS attracted the attention of numerous visitors with our brand strength in the rock drilling tools industry, comprehensive product displays, exquisite booth design, and a professional exhibition team. However, the highlight of our participation in this exhibition was the tapered drill bits we independently designed, developed, and manufactured. This innovative product became the center of attention and inquiries from numerous industry professionals.

Throughout the exhibition, we engaged in in-depth discussions and negotiations with many visitors, exploring their needs and challenges. These valuable exchanges opened up new opportunities for cooperation with potential clients. At the same time, we had the pleasure of reuniting with many old friends whose long-term trust and support enriched our exhibition experience.

SINODRILLS is committed to becoming the leading Chinese brand in rock drilling tools exports, providing high-quality rock drilling products, and offering excellent services to global customers. We aim to reduce drilling costs per meter for our clients and work hand in hand with them toward success. We look forward to meeting you again at future exhibitions and exploring potential business collaborations together, as we continue our journey towards success with every customer."

As one of leading Chinese rock drilling suppliers, we will take part in the BAUMA with our latest products. We sincerely invite you to visit our booth No. 136 in Hall E5.

Guizhou Sinodrills has been deeply involved in the Latin American rock drilling tools market for many years and enjoys a high market reputation. Thanks to this, during the entire exhibition, our booth was so crowded. In addition to meeting and communicating with many previous customers with years of cooperation to consolidate the existing partnerships, we have also discovered large amounts of potential customers.

Through Perumin, we have understood the future development direction of the Latin American rock drilling tools market, which brought new opportunities for the company's future development. We will continue to follow the spirit of specialization, quality and innovation to serve all our customers, and occupy the market by virtue of quality and service.

As one of the leading suppliers of rock drilling tools in China, SINODRILLS will participate in this exhibition with the latest products. We hereby genuinely invite you, as well as representatives of your company, to visit our booth at Booth 788, 789 in Hall C. We sincerely look forward to meeting you at our booth.

Europe is one of the core markets for our company. In this region, we have maintained a stable market for a long time, which is growing year by year. In addition to the influence of BAUMA, we have met with partners from over 40 countries around the world. Meanwhile, we have also had effective communication with several potential customers. Due to the successful cases we have achieved in the past and the excellent market reputation, many potential customers showed great interests in our products, what’s more, there are customers signing purchase contracts with our company on site.

2019 BAUMA fully reflects the recovery of the global construction machinery market, including the demand for our drilling tools. At the same time, we also keenly feel that quality and service are the core competitiveness in the future. Therefore, we will continue to focus on the quality, innovation and service, so as to provide better and more stable products and more superior services for all our customers.

In 2022, let us meet again at BAUMA.

As one of the domestic excellent rock drilling enterprises, Guizhou Sinodrills will take part in the BAUMA with the latest products. We hereby sincerely invite you and your company's representatives to No. 513 booth in Hall C2.

This time, we met our existing customers who have cooperated for many years with us; at the same time also communicated with many potential customers. After the further communication with potential customers, they knew more about our company, in addition, they’ve shown great interests in our self-drilling anchor products and expressed willingness to cooperate with us.

As one of the most important core markets in our company, we maintained a stable market share in Europe for a long time. Combined with the influence of INTERMAT, It gives us great pleasure to meet and communicate with many cooperative partners from France and other European countries. Besides, we also have a professional reception to the potential customers. Some of them not only expressed their willingness to cooperate with us, but also signed a contract with us in our stand. 

The European market as one of the main markets for Guizhou Sinodrills, this time we will carry our products with premium quality to attend the Expo. We genuinely invite you and your company's representatives to No. D058 booth at Hall 5A, with a sincere expectation for meeting you. 

At this expo, our booth has become the focal point of China zone, attracting numerous visitors. We’re honored to meet some of our regular customers and deeply communicate with many potential customers. They’ve shown great interests in our self-drilling anchor (SDA) and DTH drilling tools and expressed keen willingness to cooperate.

MINExpo 2016 will be held from 26th to 28th of September this year with an exhibition area of 76,000 m2, and it will attract more than 1,800 exhibitors from the world.

As one of the excellent rock drilling tool enterprises in China,Guizhou Sinodrills will attend the expo. We look forward to meeting you on 28301 at South Hall.

At this BAUMA, we not only meet and communicate with more than 60 old customers, but also talk with more than one hundred potential customers. Our sales consultants introduce our products patiently and professionally, and many potential customers express their keen interests and strong willingness to cooperate. Some of them even place orders on the spot.

BAUMA 2016 has been over. We’re expecting to meet you again in 2019 in Germany.

The 31st Edition of the World's Leading Trade Fair bauma takes place in Munich from April 11–17, 2016. Once again, the 2013 exhibition set several new records—confirming yet again its leading role as the largest trade fair in the world.

We will be present with our up-to-date products and latest catalogues at BAUMA from 11-17, April, 2016.

Our booth number is c2.505. We look forward to seeing you there, and prepare some small gifts for you.

Our Booth

This is our first time to INTERMAT. Because Europe is always our principal market, and Paris enjoys a unique geographical advantage, we’ve met and discussed with over 30 long-term cooperative customers and distributors from 15 countries during the event. We feel greatly honored. It not only makes us clearly know our customers’ needs, but also lays a solid foundation for providing better products and service in the future.

Talking with our business partners

Introducing our products to the customers

Although the global drilling market is in a downturn, our products still hold a stable market share in Europe by virtue of superior quality, competitive price and better service. Thanks to INTERMAT, We are able to present our products, expertise and service to more potential customers. We’re looking forward to attending INTERMAT in beautiful Paris in 2018.

INTERMAT is organized by S.E. INTERMAT, an umbrella organization bringing together the trade associations for manufacturers and importers CISMA (Association of Equipment Manufacturers for Construction, Infrastructure, Steel and Handling Equipment Industries), SEIMAT (Association of International Civil Engineering, Mining, Construction and Hoisting Equipment Industries) and Comexposium, one of Europe’s leading event organizers.

INTERMAT held every three years in Paris, the show is the global meeting place for construction, mining and materials industries. It is a technological showcase for equipment, components, tools and services, and the stage on which all the latest innovations of the sector are unveiled.

We will be present with our up-to-date products and latest catalogues at INTERMAT from 20-25, April, 2015.

Our booth number is B002, Hall 5B. We look forward to seeing you there, and prepare some small gifts for you.

bauma China rock drilling tools trade fair

Despite the downturn in the market and the severe challenges facing the industry, SINODRILLS in BAUMA China 24 square meters show regional still attracted more than 300 visitors from 23 countries and regions.

bauma China rock drilling tools trade fair

New records for SINODRILLS at BAUMA 2014:

39 old customers visited us

Our booth attracted more than 200 potential customers

More than one million USD orders had been concluded;

bauma China rock drilling tools trade fair

At BAUMA, we had a very nice and fruitful presentation, during four days exhibition, more than 30 old customers visited us and our booth attracted more than 200 potential customers. What’s more, more than one million USD orders had been concluded.

The last event broke all records: With 2,718 exhibitors from 38 countries, 177,080 visitors from 141 countries, and 300,000 square meters of exhibition space, bauma China delivered impressive proof of its status as the biggest and most important sector event in Asia.

bauma China rock drilling tools trade fair

We hereby sincerely invite you and your company representatives to visit our booth at Shanghai, China. We treasure every opportunity to meet with you at hall W2-474

Thanks for good reputation that we had biult over past ten years and as one of leading manufacturers and exporters in China, we had been invited to do an interview by a local TV Station. During the interviewing, our staff introduced SINODRILLS’ business in Chile and Latin America, also expressed the confidence in expanding Chilean and Latin America markets.

EXPOMIN is recognized as one of the world's most important mining exhibitions and is a key industry event for mining in Latin America. The organizers of EXPOMIN 2014 expect there will be 80,000 visitors and 1,400 exhibitors from over 30 countries. This creates a strong opportunity to meet mining executives, specialized distributors and potential commercial partners and customers from Chile and the Latin American region.

SINODRILLS will attend this exhibition from 21 - 25 April. We will bring our newest product catalogues and products attend this fair. We will take products including Rock tools with bits, rods and shanks, and ground drilling tools, with DTH Bit. Also some other related products will be displayed on it.

We hereby sincerely invite you and your company representatives to visit our booth at Santiago, Chile. We treasure every opportunity to meet with you in No.144, Hall 1B

For this equity incentive project, Sinodrills has introduced a scientific and comprehensive "1-3-2" virtual share to registered share conversion plan. This plan entitles the incentive recipients to enjoy on-the-job dividends in the first year, providing immediate rewards. In the following three years, those who pass the rolling assessment will be promoted to be registered shareholders. The equity is distributed based on job contributions, allowing them to share the fruits of the enterprise's growth. The shares after registration will have a two-year lock-up period to escort the company and the talent team to move forward steadily. After the lock-up period expires, equity transactions will not be restricted. This plan not only builds a clear and definite career development path for talents, but also optimizes the company's equity structure and stabilizes the talent team.

This move demonstrates Sinodrills' profound understanding and high attention to the value of talents, and is the concrete practice of its comprehensive upgrade of the talent strategy. Looking forward to the future, Sinodrills will continue to adhere to the "people-oriented" principle, continuously optimize the incentive policy, provide a stage for every aspiring individual to realize higher value, join hands to create a more splendid and glorious tomorrow, and contribute to the development of the industry.

In today's global market, intellectual property has become a crucial part of a company's core competitiveness. We have always placed great importance on protecting our brand's intellectual property. Over the past 20 years, we have continuously improved our company's competitiveness and brand image. As our market share abroad has steadily increased, the "SINODRILLS" brand has become the preferred choice for more and more overseas customers.

Moving forward, we will continue to unlock our brand's potential, pursue ongoing independent innovation, and strive to provide better products and services to our customers, enhancing brand value through product quality.

In creating this modern office environment, we paid attention to every detail: from spatial layout to color schemes, everything has been carefully designed and considered. Our goal was to create a workspace that not only inspires creativity and enhances efficiency but also makes our clients feel welcomed. The new office space has achieved numerous innovations and optimizations to better meet the evolving needs of our business. We have added multifunctional areas such as an open-plan office area, advanced multimedia conference rooms, a global standard international video conference room, an engaging product showroom, and a multifunctional relaxation area. Each of these areas is designed to provide an exceptional work and experience environment.

With this series of upgrades, we aim to improve the comfort and functionality of our work environment to better support our business development and provide excellent customer service. We firmly believe that only in a comfortable and motivating office environment can our employees' potential be fully unleashed, enabling them to provide more professional and efficient services.

We sincerely invite you to visit our new office space. Your visit will greatly encourage our team and propel us forward. We also want to express our gratitude for your continued trust and support. We look forward to creating a brighter future together in our new environment.

SINODRILLS has prepared carefully selected gifts for all female employees and the female relatives of all our staff, with the hope that everyone can enjoy happiness and joy, and also to feel our support and appreciation.

We want to thank all female employees of SINODRILLS. Your professionalism, courage, and dedication make us immensely proud. We also express gratitude to the female relatives of all staff member for their silent support, which enables us to focus on our work.

Finally, we wish all female employees and female relatives of our staff a happy Women's Day!

At the annual meeting, the general manager of SINODRILLS made a comprehensive summary of the company's annual operation, affirmed the work achievements of all departments, and expressed heartfelt thanks to all employees for their hard work. In 2022, all SINODRILLERS faced up to the challenges and rose to the occasion in the face of adversity, and the company achieved brilliant sales results, setting a new high sales performance in the company's history. At the same time, the company also made a qualitative leap in operation and management. Looking into the future, we will continue to work together to write a new chapter of SINODRILLS. At the dinner after the meeting, all SINODRILLERS gathered together and raised a glass to a better future!

"A hundred boats are competing for water, and the one who strives for water is the first." SINODRILLS will continue to take value creation as its mission and high-quality development as its theme and cooperate with all customers sincerely to make steady progress towards the new goal in 2023!

At the meeting, the General Manager summarized the whole year work of the Company and formulated the development direction for the new year. Looking back over the past year, Sinodrills has made extraordinary achievements in its adversity, not only having the sales performance reached a new high, but also continuously improving its operation and management efficiency; while looking forward to the future, it will not forget its original intentions but forge ahead. At the meeting, the General Manager also commended and rewarded the outstanding individuals as selected in 2021, and called on all employees to learn them and make new contributions to the development of the Company. During the dinner after the party, all staff toasted for the future amidst laughter!

2022 is the 20th year of Sinodrills, the struggle of its staff in the past 20 years has laid the foundation for its current outcome, and the customer support for twenty years has contributed to its remarkable achievements. Looking ahead, we are full of confidence, and will continue to work hard to continuously improve our quality and service so as to offer more customers with better, more economical and more efficient solutions to drilling tools.

The new multi-functional showroom has a total area of nearly 150 square meters, including a company introduction area, product showing area, business meeting area and video conference area. Through a variety of exhibition forms such as videos, pictures, physical samples, and interactive touch screens, the company image and products can be showed in an all-round way.

As one of features, the video conference adopts the latest HD video technology and cloud computing technology, it can not only ensure the smooth "one-to-one, one-to-many and many-to-many" video conference with customers all over the world, but also realize function for screen and file sharing during the video conference. It greatly improves the efficiency of video conference. Combined with our wide range of samples, we are able to communicate with global customers efficiently and provide our customers with better pre-sales, in-sales and after-sales services.

The new showroom not only provides a platform for the company to display its corporate image, but also lays a base for us to better communicate and serve with customers. We will also use this as a basis to provide better products and services to more domestic or oversea customers.

Upon hearing the news, our company immediately contacted the local Red Cross and donated RMB30,000.00. Drops of water make up the sea, every penny gathers into hope. We do our small part to support the anti-disaster work. Unite as one to get through the difficulty and fight the disaster through thick and thin. We sincerely hope that the disaster will be relieved at an early date and the local people will resume work and normal routine very soon.

Women are an indispensable force not only for family but also for career. They pay the most powerful and sweet dedication to their family. On the other hand, they give the most meticulous and efficient contribution to their career. Every mother is the greatest person of human society progress, and every woman is a catalyst for the progress of our career. The roles that women play in society are varied and indispensable. Just like flowers blooming in the warm spring, women are also showing their unique charm in their respective fields. We hereby express our thanks to every women for their contribution and dedication, and wish all women a happy holiday!

We will continuously optimize and improve our quality management and service to provide customers with better products and service.

As of late June, 2020, our company has offered more than 60,000 masks to clients located in over 40 countries and areas. The Chinese often say, “Distance cannot separate true friends who remain close even when thousands of miles apart.” SINODRILLS has kept close communications with our all cooperative partners with care and mutual support. We have established deep friendship surpassing the field of trades. We are willing to provide support within our power to all cooperative partners for solidarity against the pandemic.

Glutinous rice dumpling full of affection implies the culture of love and warm wishes for this festival. It seems a simple gift, but shows company’s best wishes to all staff and their families. Wish all staff a good festival and happiness for the whole family.

SINODRILLS will continue to adhere to the operating principle of “Co-innovation, Mutual Sharing” to strengthen our efforts to create more healthy and harmonious family.

Working together to safeguard our safety. We believe that under strong leadership of CPC and the whole state, we will be able to win the battle against the disease through joint efforts taken by all sectors of the society.

The success of being one of key contacting enterprise not only embodies the recognition of our company’s operating achievements over the past years by relative authorities, but also represents our continuous development. As one of the key contacting enterprises we enjoy the priority to receive project support, export tax refund, customs clearance convenience, foreign exchange receiving and financial support provided by government departments at different levels. Our company will take that as our opportunity to continuously adhere to developing based on high quality, good services and credit, in order to provide products with better quality and services to more worldwide customers through constantly strengthening quality management and sense of services.

In the future, SINODRILLS will strictly implement the requirements of quality management system and product quality control, continuously improve our management level, continue to improve our product performance, and provide customers with better products and services

SINODRILLS’ new uniform uses bright red as the main color, which symbolizes the positive working attitude and indomitable spirit of hard work of all SINODRILLERS. It also keeps alerting everyone at all times, maintain strict working conditions at all times, highlighting new achievements for the company's new journey of professional development.

Lugu Lake is like a pearl inlaid in the embrace of the mountains. On sunny days, blue sky and white clouds are reflected in the lake, with the water and the sky merging in one color, which constitutes wonderful sceneries. Due to the beautiful natural scenery and peculiar ethnic customs, the place is called "God Residence" by the explorer Joseph Charles Francis Rock.

During the four days and three nights, everyone was indulged in the landscape, not only experienced the beautiful scenery, enjoyed the joy and relaxation of tourism, but also enhanced mutual understanding, comprehending and friendship. We believe that this short break will inspire us to dedicate ourselves to the work of the second half of the year in a more active and full-fledged state, and constantly break through and create higher performance.

The new-generation “GSE Fully-carburized Taper Drill Rod”, on the original basis, has increased the surface hardness of the rod body sharply and promoted the abrasive resistance of the product. This means that the drill rod not only bears stricter drilling requirements but also lowers down the drilling cost. With the excellent quality and overlong service life, GSE Fully-carburized Taper Drill Rod will provide higher performance and productivity to your drilling work.

GSE Fully-carburized Taper Drill Rod’s advantages:

• The service life extension has leveled up the overall work efficiency

• The abrasive resistance promotion has lowered down the overall drilling cost

• The specification diversification has leveled up the product matching attribute

Guizhou Sinodrills has devoted itself to build up an enterprise that the employee would feel proud of, happy and belonging. On the occasion of such a festival, we’re offering such a present to you. On the occasion of Dragon Boat Festival, we’re sending the best wishes to every employee. The fragrant sticky rice inside the reed leaves not only makes people sense the festival atmosphere but also delivers the appreciations and feelings of the company to every employee.

Guizhou Sinodrills will continue to persist in the operation principle of “Create Together, Share Together” and create a healthy and harmonious Sinodrills family.

We not only arranges basic health examination, blood examination, occupational disease examination and other routine items, but also arranges several specific physical examination items for employees in accordance with the actual situation of the company this year. The annual physical examination is designed to enable every SINODRILLS staff to keep abreast of his or her health, to enhance his or her health awareness, and to share the achievements achieved by the company with all SINODRILLS staff.

Guizhou SINODRILLS will continue to put the care for employees into practice, adhere to the business philosophy with "common creation, and common sharing" so as to create a healthy and harmonious SINODRILLS family.

The trip destination was Dali, a famous tourist resort in Yunnan province. There are four wonders to represent Dali, shortened as” Xiaguan’s wind”, “Shangguan’s flowers”, “Cangshan Mountain’s snow “and “Erhai Lake’s moon reflection”. In Dali, Mt. Cangshan sits above Lake Erhai where the green is mirrored by the blue. Benefiting from such a unique astonishing natural landscape, it is also well known as “ Oriental Gevena”.

We cruised in Lake Erhai and hiked on Mt. Cangshan. We enjoyed beautiful scenery in daytime and tasted delicious food at night. The three days’ tour not only relieved us from work pressure, but also built up our team cohesion. More significantly it inspired all of us to devote more enthusiasm into our work in the second half year with a motivation to achieve a greater glory.

Since the company has been established, we know that integrity is the foundation of an enterprise. We have won this honor again, which means the full recognition of the governmental authorities for our consistent integrity management. It not only shows the corporate image of our company, but also constantly reminds us that we need to pay high sense of responsibility to provide better products and services to the customers.

Acquiring this certificate proves the full recognition of China customs for our standardized management and honest operation, which enables us to enjoy more convenient clearance process in our export business. We will take this opportunity to strengthen our management in the hope of providing more efficient and professional service to our customers.

SINODRILLS’ new uniform pays attention to practicality and beauty. Every employee shows their professional through the uniform, also reflected all staff spiritual outlook, and strengthened the centripetal force and cohesion for all SINODRILLER. At the same time, it also improves the public image of the company. The uniform shows the standard and specification of the company, and deliveries brand image to everyone.

Jiuzhaigou valley, as one of the most famous World Natural Heritage, it's the first nature reserve of China which is established for the main purpose of protecting the natural landscapes. The alpine lakes, spectacular waterfalls, color forest, snow-capped mountains, blue Ice, and Tibetan folkways are called "six absolutely of Jiuzhaigou". It is known as the "Fairy Tale World" and "King of Water view".

The scenery along the way makes us relaxed and happy, and also enhances the interaction and communication of each other. During these five days of travel, we not only show a harmonious, enjoyable and vigorous team spirit, but also strengthen condense force and inject more energy into the works of the second half of year.

In this field we’ve made huge progress from scratch, just like the development of Sinodrills, from a trading company 14 years ago to a professional drilling tool supplier with production, sales and service today. With the spirit of "Drilling more, drilling globally", we will spare no efforts to forge ahead and provide our customers with better products and excellent service.

Yellow is a color full of vitality and hope, just as Sinodrills, a promising company. Yellow is also a symbol of wealth, and we hope all our customers create more wealth along with us. Yellow can also warn people, and reminds all Sinodrillers to seriously treat our customers and products.

Since the establishment, Sinodrills firmly sticks to uncompromising integrity as the foundation of business operation and one of the most essential principles for development. Gaining the title not only recognizes our achievement in contract fulfillment and enterprise credit construction, but also reminds us to treat our customers, employees, and cooperative partners with integrity.

The rating of 3AA2 reflects a company’s ability to fulfill contract, comprehensive credit, strength and competiveness. It not only honors us, but also urges us to do better. With sound corporate reputation, quality products and excellent services, we will grow bigger and stronger along with our partners and customers in rock drilling industry in the future.

It’s the second time to increase our registered capital since the establishment of the company, showing our company steps into a new development stage. The addition not only enriches our operating capital and improves our market competiveness, but also affirms our business performance during these years and shows our customers confidence. Based on this, we will continue to improve ourselves and modify our products, commit ourselves to rock drilling industry, and try to become the most reliable rock drilling supplier in China.

Chishui City, located in the farthest northwestern part of Guizhou with a forest coverage rate of 80.3%, is the only national scenic site named after an administrative region by The State Council. The city enjoys good reputations as “City of a Thousand Waterfalls”, “Hometown of Nan Bamboos”, and “Kingdom of Spinulose Tree Ferns”. The legend of Chinese Red Army Crossing Chishui River Four Times and The list of Chishui Danxia as World Natural Heritage make it more famous around the world.

During the three-day trip, we relax our heart and soul in the nature; we help each other and care for each other; we get physical and mental pleasure and enhanced harmony, solidarity and cooperation, which not only strengthen our team cohesion, but also inject tremendous energy to our work in next half of the year.

Returning from Chishui, we are all pouring full passion and enormous energy into our work. We believe that all Sinodrillers will continuously provide superior products and better service to our customers in the future.

After more than two years process of modification and repeated tests, we now successfully develop a new kind of tapered button bits. Our new tapered button bits are featured with all new processing technology, unique steels of bit skirts and excellent quality of carbides.

During the past two years testing under various geological conditions in more than 10 countries, our new taper button bits show both performance and average life span are comparable with international leading brands, such as Sandvik or Atlas Copco, however, our price is lower by at least 30%, even 50%

In order to clearly show our products to our customers in a more professional way, SINODRILLS had thoroughly upgraded all the existing product catalogues by the end of 2014. The latest version can give you a more specialized and specific description and introduction on our products. We adopt a brief style during the page editing so that our customers can easily search the products they need. From designing to typesetting, all the catalogues are composed according to our company VI and have achieved a high unification. No matter their appearance or the inside pages can be presented to our customers in a clear and simple way.

The current updated catalogues are including General Catalogue, Self-drilling Anchor Catalogue, DTH Bit Catalogue, DTH Pipe Catalogue, DTH Casing Drilling System Catalogue and DTH Hammer Catalogue. Next we are going to update our other products catalogues, including Top Hammer Drilling Tools Catalogue, Drag Bits Catalogue and Diamond Exploration Drilling Tools Catalogue.

BEC Vantage, as one of our regular trainings, is carried out among our First business department, Second department and Marketing department. The training is aimed to improve all business personnel’s ability of English speaking, writing and listening.

sinodrills' training With continuous improvement and enhancement, we believe that we all SINODRILLERs can serve every valued customer better and better.

Thanks for our reliable quality, competitive prices and professional services, “Made by SINODRILLS” has been exported to 82 countries and areas in the world and been accepted and chosen by more and more drillers, contractors and distributors.

Through twelve years development, we have been continually growing stronger. In order to meet the company development, we now launch a new Logo as shown below:

SINODRILLS' NEW LOGO

The new Logo is composed of blue and yellow. The former represents a positive and exuberant vitality, which symbolizes our positive attitude, tenacious and courageously struggle spirit toward work; the latter stands for we are dealing in the Rock Drilling field and will constantly offer the best quality and services to consumers. With an opened circle in the middle means we will adhere to making all better; the highlighted yellow triangle guides us forward. We will endeavor to be a top supplier in Rock Drilling Tools Industry in China by continuously improving to provide better and better products and service.

Therefore, we would like to draw your attention and look forward to your continued support and cooperation.

                                                                                View of Guliangyu, Xiamen

Four days trip was short but full, everyone had a good time and was fully relaxed both in body and mind during those days, and closed the relationship among employees and created a united and positive environment at the same time, which greatly enhancing the cohesion and solidarity of our sales team. We always believed that this kind of activities is not only in recognition of what we have done in the first half of the year but also a new start of our next success.

                                                                                Sales team of SINODRILLS

At last, we would like to express our sincere gratitude to all of our clients from more than 80 countries in the world for your trust and support,meanwhile please believe we all SINODRILLERS will do our utmost to offer more and better products and service in future.

CE marking indicates the compliance with EU legislation of a product, wherever in the world manufactured, and enables its free movement within the European market. By affixing the CE marking on a product, a manufacturer is declaring, at its sole responsibility, conformity with all of the legal requirements to achieve CE marking which allows free movement and sale of the product throughout the European Economic Area.

After many strict tests had been passed in UK, SINODRILLS Self-drilling anchoring tools were certified with CE  in May, 2014. The CE certificate covers our full range of Self-drilling rock bolts including R25, R32, R38, R51, T76, T30, T40, T52, T73, T103, T111, T127 and T130.

Date: In January, 2014.

DTH Drill Rig Model: DM45 HP & DML

DTH Hammer Model: SINODRILLS QL60 quick hammer

Rock Formation: Rock conditions vary widely, from mild rock (not very abrasive) to very hard and very abrasive.

DTH Button Bits Configurations: QL60 171mm, 10 gauge buttons x 18mm, 10 face buttons x 18mm, two flushing holes

                                                      New bits                                                                       After 18 times sharpening

Our three pieces of QL60 171mm button bits had been tested from the 7th to 20th of January, as below, it was the summary for the drilling test.

As below, it was our # 1 bit detailed drilling record from the site.

Remarks: Red box: with SINODRILLS brand QL60 quick hammer, 0.68 m/Min average speed;

Yellow box: with world famous brand A QL60 shank hammer, 0.55 m/Min average speed.

As below, it was the summary from the site manager about SINODRILLS DTH button bits:

SDA system may be used for different rock conditions, and drill bits are available in different designs and diameters. The thread types are compatible to international standards and can easily be adapted to standard rock drilling equipment. The SDA range is available in different load capacity classes, depending on the outer and inner diameter of the bar.

The self-drilling anchor bolt system makes your anchoring much easier, as it is capable of performing procedures of drilling, anchoring and injection all at once.

Self-drilling installation may be accomplished either manually or semi-automated, depending on the available drilling machinery.

Main Advantages of Self Drilling Anchor system

• Simultaneous drilling and installation

• Installation using standard drilling machinery

• Immediate load-bearing capacity after installation and activation of the expansion element

• Reduction of cycle time due to the de-coupling of the grouting procedure from installation

• Ability to maintain load-bearing capacity even when undergoing large deformations

• Tough system components

• Safe, easy, and reproducible installation procedure

• Improved drilling accuracy thanks to the directional guidance of the self-drilling expansion element

• Trouble-free application in unstable borehole conditions

• Easy extension using couplings

• Design and diameter of the expansion element can be adjusted to suit different and varying ground conditions

SINODRILLS Self Drilling Anchor System may be used as a fore-poling element for pre-support or as a lance for injection works.

Fields of Application

• Civil Engineering

• Underground Mining and Tunneling

Typically installed with rotary percussion drilling, using the simultaneous drill and grout technique where grout is pumped through the bore of the bar to the sacrificial drill bit as drilling is advanced with the grout flush comprising a part injection / part flush system. Permeation of grout beyond the nominal borehole diameter can occur in granular soils but be very limited or non-existent in cohesive soils. Air flush, with very careful flush control, has been used in cohesive soil;

May be constructed with cased or un-cased drilling systems to form the borehole into which the anchor components (either bar or strand) are inserted and grouted in place;

Have a defined free length which is isolated from the ground and is free to extend elastically when the anchor is stressed and then throughout its working life;

During the construction of underground works, it is very common to encounter soft rock, fractured zone and large deformation due to high ground stress. In the case of serious collapsing, extra-long anchor is needed instead of ordinary one.

Based on these reasons, IBO self-drilling anchor drilling tools are more and more widely used in underground, support, tunnel and other fields.

IBO Self-drilling anchor embodies drilling, grouting and anchoring as a whole. It widely used as an efficient anchoring means, in tunnel pre-support, slope, coast, mine, water conservancy projects, building foundation, roadbed reinforcement and geological diseases treatment such as landslip, crack, sink age. It’s irreplaceable in narrow construction environment.

The IBO self drilling anchor bolts are fully threaded, hollow core, cold rolled anchors with continuous outside thread suitable for attaching bits and couplings, which also forms a superb mortar connection. They are supplied with couplings, anchor plates and nuts, and anchor drill bit.

IBO Self Drilling Anchors are used for temporary and permanent stabilization; retaining walls in confined spaces; and slope stabilization for roads, railways, and tunnel portals. Whether used in cohesive or non-cohesive ground, the IBO self drilling anchor can be grouted and then stressed and locked off with nut and plate. Advantages are: similar installation for all ground conditions; no casing required; fast drilling and anchoring in a single operation; choice of bits and anchor loads; and hollow core for high-volume flushing and grouting.

Features of IBO self drilling anchor system:

1, High penetrability anchor drill bits, they are very easy to penetrate various rocks.

2,  Self-drilling anchor can be used at the place with narrow space. With continuous thread, achieving the aim of rock reinforcement with extra-long anchor

3, Unnecessary to be pulled out. Hollow steel can be used as grouting channel;

4, Embodies drilling, grouting and anchoring in one step.

The entire self drilling anchor system is mainly composed of the following important parts:

Self drilling anchor bolt/bar (SDA / IBO)

Self-drilling anchor bolt is a fully threaded hollow steel rod, it manufactured from high quality steel, with cold rolled to standard thread. The hollow core used for flushing, drilling and grouting.

The self drilling anchor bolt has more bending strength for reinforcing solid bars, soil nails, and rock anchors.

Self drilling anchor bit

The drill bit used to drilling, and help self drilling anchor bolt insert the hole at the same time. According to different geological conditions, it can be chosen with different shapes and materials.

Self drilling anchor coupler

The main purpose for coupler is to connect the self drilling anchor bolts. It used to extend the self-drilling hollow bars. Self-drilling anchor couplings are used to link anchor bars to make the anchor longer, thus promote its installation depth.

Self drilling anchor nut

Self-drilling Anchor nut is used to lock the anchor system. It manufactured from high precision steel with chamfered edges on both ends from high precision steel, and tempered to meet the stringent demands on anchor specifications and the daily operations of underground work.

Self drilling anchor plate

The plates feature a chamfered bore to ensure firm seating of the nut. The self-drilling anchor plate transmits load force from the self-drilling anchor system to the work face.

Other Accessories

Applications of Self-Drilling Anchors

Slope stabilization	Foundations with micropiles	Tunneling & Mining

The Self-drilling hollow anchor bolt is a fully threaded hollow bar which can be simultaneously drilled and grouted into loose or collapsing soils and brittle rock without the need for a casing.

The rock bolt is connected to the hydraulic rock drill by an adapter device and installed in the way a conventional borehole is drilled. There is a hollow interior of the self-drilling anchor bolt, a threaded exterior and a drill bit that is used for drilling. The self-drilling anchor bolt’s hollow interior enables air and water to freely more though the drilling process, flushing the particles. After completion of the drilling process, it also enables immediate injection. Continuous thread enhances pull-out resistance with grout. For fractured or hard rock formations as well as uneven ground conditions (such as gravel, soft, clay and non-homogeneous soil), self drilling anchor bolts present a specific bolting solution.

The self-drilling anchor bolt system makes your anchoring much easier, as it is capable of performing procedures of drilling, anchoring and injection all at once.

SDA system may be used for different rock conditions, and drill bits are available in different designs and diameters. The thread types are compatible to international standards and can easily be adapted to standard rock drilling equipment. The SDA range is available in different load capacity classes, depending on the outer and inner diameter of the bar.

Self-drilling hollow anchor bolt is mainly used in slope stabilization, tunneling pre-support, foundations with micro piles, it is also widely used in the railway system, metro project etc. It can be installed in sites with weak rocks, loose soil, and weathered layer, sand with stone layer and so difficult to create a hole in complex formations. The unconsolidated ground condition favor the self-drilling anchor bolt technique for fast and simple method of installation compared to the traditional method.

The hot-dipped galvanized coating is excellent for use in moist atmospheres where more rust resistance is required than the standard zinc plated wedge anchors can provide.  Ensure the service life of the anchor rod.

Hot-dip galvanized self-drilling anchor bolt

Galvanized self-drilling anchor system / full threaded steel self-drilling rock bolt / hollow anchor bar / anchor rods.

In order to reduce the corrosion rate and thus increasing the service life, SINODRILLS offer hot-dip galvanized systems. A complete hot-dip galvanized system is usually including hollow bar, coupler, nut and plate. All hot-dip galvanized items confirm to following standards:

SINODRILLS Galvanized Self drilling anchor bolt Parameters for T Thread

SINODRILLS Galvanized Self drilling anchor bolt Parameters for R Thread

Application of SDA (Self Drilling Anchoring system)

Self drilling anchor system can be used for underground applications and in civil engineering. In the field of underground applications, it can be used for bolting, piling, face stabilization, as fore poling element for pre-support, or as a lance for injection works.

The Self drilling anchor System also features a wide range of applications in civil engineering such as rock and soil nails, micro-piles, or ground anchors. The system is an “all in one” tool for drilling, flushing, post- or simultaneous grouting, and finally the load-carrying member itself.

Installations in weak ground and unstable borehole conditions represent no difficulty and are ideal for the application of the Self drilling anchor system.

Main Constitution of SDA (Self Drilling Anchor system)

01  Anchor Bit	02  Anchor Bar	03 Anchor Coupler	04 Anchor Plate	05 Anchor Nut

• Self drilling anchor bar (Hollow anchor bar)

Hollow anchor bar is the body of a self-drilling anchor, as a hollow steel tube with an outer round thread, hollow anchor has the sacrificial anchor bit connected at one side, plate and nut connected at the other; two hollow anchor bars could be connected together via a coupling, for duties that requiring longer anchors.

• Self drilling anchor bits

Anchor bit is the front part of the self-drilling anchor system, by cutting and drilling rocks and other geological structures, the anchor could be sent to the designed depth.

• Self drilling anchor coupler

Self drilling anchor couplings are used to link anchor bars to make the anchor longer, thus promote its installation depth. 

• Self drilling anchor plate

The self drilling anchor plate transmits load force from the self-drilling anchor system to the work face.

• Self drilling anchor nuts

Self drilling anchor nut locks the plate, transmits force from anchor bar to plate and finally to the working face.

Soil nailing is an efficient, effective and economical method of soil reinforcement. The reinforcement is installed into the slope face of in-situ ground, whether natural soil or an existing fill, stabilising such material. Soil nailing can be used to stabilise, existing structures such as unstable slopes, embankments and retaining walls. The use of soil nails can be adopted for the stabilisation of cuttings and coastal and quarried cliffs. The construction of new steep slopes for widening of infrastructure routes, new developments and new retaining walls, has seen an increase in the use of soil nailing. This method of soil reinforcement can be used for both permanent and temporary applications.

The self drilling anchor(SDA) system offers self-drilling soil nails where the central hollow threaded reinforcement bar acts as both final reinforcement in the completed anchor and as the drill rod during installation. The self drilling anchor(SDA) system is installed with sacrificial drill bits under a grout flush. In granular deposits in particular, the impregnation of grout into the surrounding ground significantly enhances the geotechnical capacity of the anchor. Large slabs of concrete and rock can also be readily drilled. These anchors work well as both tension and compression tiebacks and can be installed horizontally to meet any tieback or anchoring design criteria.

The application for self drilling anchor soil nailing include the stabilization of enbankments, dams, cuts, unstable slopes and tunnel entrances and the refurbishment of retaining walls.

Range of applications

Slope stabilisation	Anchoring sprayed concrete	Stabilizing existing retaining walls
Dams Cuts Embankments Erosion protection Protective nets Avalanche protection	Excavations Retaining walls Tunnel entrances Emergency stabilization measures	Retaining walls Stone walls Concrete walls Crib walls

SELF DRILLING HOLLOW ANCHOR BOLT

The hollow bar features a left hand or right hand with R thread (rope / round thread) or T thread (trapezoidal thread) for easy extension and connection to all conventional drill rigs. It is manufactured from high quality seamless steel tubes. The R thread and T thread all according to ISO standards or international standards, and both thread formed in a cold rolling process.

COUPLERS

The couplers are used to extend the hollow bars. The required length of the load-bearing element can thus be achieved also in cases of limited feed length of the drill rig or low headroom conditions.

All couplers are designed to safely transfer the specified system load, with the faces of the hollow bars bearing against each other to ensure safe energy transfer between the hollow bars and the drill bit without affecting the couplers mechanically.

PLATES

The steel plates feature a chamfered bore allowing an angle of deviation of 5 degrees in all directions.

NUTS

The nuts transfer the load from the plate into the hollow bar. They feature a spherical cap on at least one end to compensate for angle deviations. All nuts are so designed as to ensure safe transfer of the specified system load.

DRILL BITS

The correct selection of the drill bit dependent on the geological conditions on site is essential to ensuring a productive and cost-effective installation of the Self Drilling System.

Therefore, applied protective methods are directed towards a reduction of the corrosion attack and the respective damages to the reinforcement or ground control elements during their intended lifetime.

Corrosion Protection Methods

The selection of the optimal corrosion protection method(s) depends on the corrosion potential of the environment, and the type as well as the intended service life of the structure.

The load-bearing element, transition zone between borehole and surface, and the head construction must be assessed separately.

Corrosion protection methods are divided into two main groups.

The first one is called active, and comprises all influencing methods which eliminate or reduce the corrosion reaction. A common example for active corrosion protection is encapsulation with concrete.

The second one is called passive corrosion protection, including methods to produce a protective layer on corrosion endangered parts, for example duplex coating systems.

Self-drilling hollow steel bolt tendons for permanent application are reliably protected by surrounding body of cement grout. The following additional measures can be employed to improve the corrosion protection for special applications.

Hot-dip galvanized self-drilling anchor bolt

Galvanized self-drilling anchor system / full threaded steel self-drilling rock bolt / hollow anchor bar / anchor rods.

In order to reduce the corrosion rate and thus increasing the service life, SINODRILLS offer hot-dip galvanized systems. A complete hot-dip galvanized system is usually including hollow bar, coupler, nut and plate. All hot-dip galvanized items confirm to following standards:

Duplex Coating Introduction

According to EN ISO 12944-5, duplex systems are understood to be a corrosion protection system which consists of galvanizing in combination with one or more subsequent coatings.

The corrosion protection working mechanism of duplex systems is based on mutual protection of the partners. Protected by the powder coating, the zinc layer remains intact for an extended time period.

The hollow anchor bar incorporates a thread for standard rotary percussive drilling. Manufactured from high grade steel tubing, and Hollow anchor Bar is cold rolled to form standard Rope thread or “T” thread profiles. The Drill rolling process refines the grain structure of the steel, increasing the yield strength and producing a robust drill steel suitable for a range of drilling and grouting applications.

The Hollow Anchor Bar System includes a full range of drill bits, adaptor sleeves, couplers, nuts and bearing plates.

Key Features

■ Bars can be drilled into loose or collapsing soils without the need for a casing to support the borehole.

■ Continuous thread ensures that rods can be cut and coupled at any point, or extended.

■ Grout is injected at all points of the borehole as drilling is advanced, permeating the local strata for increased bond performance and producing bulbing in softer sections of the soil.

■ The self-drilling function enables bars to be drilled into most ground conditions for both tension or compression applications, and is also used as an injection conduit.

• Uses: Roof and wall bolting as a temporary support in tunnels.

Installation Procedure:

• Drilling, grouting, and anchoring, in one operation. The hollow steel anchor rod also acts as a grouting pipe to ease set up.

Design Considerations and Specifications:

• The ground is a vital element of the ground anchor system; therefore a good quality geotechnical investigation is essential. Various parameters to be considered during geotechnical investigations should include Classification of rocks (Geometry of discontinuities, unit weight, degree of weathering, Index test), Rock stratification, Unconfined compression strength of intact rock, Shear strength and deformability of rock mass, Permeability, Ground water conditions, Corrosion potentials of rock and ground water etc.

• Moreover, the design of the anchor system is based on rock parameters and the geometry of the anchor arrangement. Where changes in the anchor locations, spacing’s or inclinations are proposed, appropriate studies or proving tests should be undertaken to demonstrate the suitability of such an arrangement. The design of the anchor should consider the following-

• Loads and constraints of loading imposed by the anchors on the overall structure

• The way in which the loads will be applied to the anchor during its designed life i.e. static or dynamic

• The load distribution of the anchor arrangement on the structure during stressing and during the design life of the structure

• The interface between the anchor and the structure to ensure structural stability

• The consequence of anchor failure during stressing and thereafter. The diameter and tensile strength of bolt and also arrangement (number, spacing etc.) of rock bolts to be used may vary according to design. The diameter of rock bolts depend on the mass of the rock to be supported by each rock bolt and the force of resisting shear in the bedrock.

• EN 1997-1 – Geotechnical Design-Part 1: General Rules and BS EN 1537-2000- Execution of Special Geotechnical work- Ground Anchors may be followed for all geotechnical designs, installation of Ground Anchors. DIN 1054:2005-01 – Ground verification of the Safety of Earthworks and Foundations IS is also being used for geotechnical designs for ground anchors.

• Generally, Self-drilling Anchors for pipe roofs having minimum diameter 76 mm with a minimum yield load of 1200 kN are used as a temporary support in tunnels.  

• The yield loads of the bolt get transferred through thread to nut, washer, anchor plate and coupling etc. Hence, these should also be designed accordingly. The rolled thread should be in accordance with ISO 10208.

• Manufacturing of Self-drilling Anchors for pipe roof should conform to BS EN-10083- 1 “Steels for quenching and tempering - Part 1: General technical delivery conditions”.

• For all types of Self-drilling Anchors for pipe roof, the anchor head shall be designed in accordance to EN 1537:1999, and should be able to accommodate deformations, which may occur during the design life of the structure.

• Corrosion protection of Self-drilling Anchors for pipe roof should comply with Para 6.9 of EN 1537:1999.

• Tensile test of Self-drilling Anchors for pipe roof should be done in accordance to EN 10002-1. The test involves straining a test piece in tension, generally to fracture, for the purpose of determining one or more of the mechanical properties i.e. percentage elongation, tensile strength, yield strength, upper yield strength etc.

• Impact test of Self-drilling Anchors for pipe roof should be done in accordance to EN 10045-1. The test consists of breaking by one blow from a swinging pendulum, under conditions defined in code above. The energy absorbed is a measure of the impact strength of the material.

Note: All information comes from the Internet, please contact delete if it is inappropriate.

Use: Self-Drilling Rock Bolt is a rock-bolting system based on fully coarse threaded hollow bar. It is especially recommended for the following applications:

•Roof and wall bolting as a temporary support in tunnels.

• All ground conditions. Self-Drilling Rock Bolts do not require pre-drilling a hole, therefore making it usable even in soft rock conditions.

• Self-drilling bolts shall be used in ground conditions where the effective installation of other types of rock bolts is impossible.

• For loose ground/ fractured rock conditions, where drill holes collapses immediately during the drilling, the Self Drilling Anchors can provide immediate stabilization of the opening.

• It shall be grouted through the flushing hole immediately after completion of the drilling operation or simultaneously with the drilling as required.

Installation Procedure:

• Drilling, grouting, and anchoring, in one operation. The hollow steel anchor rod also acts as a grouting pipe to ease set up.

Design Considerations and Specifications:

• The ground is a vital element of the ground anchor system; therefore a good quality geotechnical investigation is essential. Various parameters to be considered during geotechnical investigations should include Classification of rocks (Geometry of discontinuities, unit weight, degree of weathering, Index test), Rock stratification, Unconfined compression strength of intact rock, Shear strength and deformability of rock mass, Permeability, Ground water conditions, Corrosion potentials of rock and ground water etc.

• Moreover, the design of the anchor system is based on rock parameters and the geometry of the anchor arrangement. Where changes in the anchor locations, spacing’s or inclinations are proposed, appropriate studies or proving tests should be undertaken to demonstrate the suitability of such an arrangement.

The design of the anchor should consider the following:

• Loads and constraints of loading imposed by the anchors on the overall structure

• The way in which the loads will be applied to the anchor during its designed life i.e. static or dynamic

• The load distribution of the anchor arrangement on the structure during stressing and during the design life of the structure

• The interface between the anchor and the structure to ensure structural stability

• The consequence of anchor failure during stressing and thereafter. The diameter and tensile strength of bolt and also arrangement (number, spacing etc.) of rock bolts to be used may vary according to design and site requirements. The diameter of rock bolts depend on the mass of the rock to be supported by each rock bolt and the force of resisting shear in the bedrock.

•EN 1997-1 – Geotechnical Design-Part 1: General Rules and BS EN 1537-2000- Execution of Special Geotechnical work- Ground Anchors may be followed for all geotechnical designs, installation of Ground Anchors. DIN 1054:2005-01 – Ground verification of the Safety of Earthworks and Foundations IS is also being used for geotechnical designs for ground anchors.

• Generally, Self-drilling Anchors/bolts having minimum diameter 32 mm with a minimum yield load of 200 kN are used for Rock bolting/ Face bolting as a temporary support in tunnels. 

• Adverse interactions of anchorages should be avoided, by keeping a space not less than 1.5 m between them, if possible.

• The yield loads of the bolt get transferred through thread to nut, washer, anchor plate and coupling etc. Hence, these should also be designed accordingly. The rolled thread should be in accordance with ISO 10208.

• Manufacturing of Self-drilling Anchors should conform to BS EN-10083-1 “Steels for quenching and tempering - Part 1: General technical delivery conditions”.

• For all types of Self-drilling Anchors, the anchor head shall be designed in accordance to EN 1537:1999, and should be able to accommodate deformations, which may occur during the design life of the structure.

• Corrosion protection of Self-drilling Anchors should comply with Para 6.9 of EN 1537:1999 as required.

• Tensile test of Self-drilling Anchors is done in accordance to EN 10002-1. The test involves straining a test piece in tension, generally to fracture, for the purpose of determining one or more of the mechanical properties i.e. percentage elongation, tensile strength, yield strength, upper yield strength etc.

• Impact test of Self-drilling Anchors should be done is done in accordance to EN 10045-1. The test consists of breaking by one blow from a swinging pendulum, under conditions defined in code above. The energy absorbed is a measure of the impact strength of the material.

• Pull out test on Self-drilling Anchors should be performed of on the basis of IS: 11309 – Method for conducting Pull-Out Test on Anchor Bars and Rock Bolts. - Minimum three pull out tests shall be conducted in one rock formation as mentioned in clause 4.8 of IS: 11309-1985 or as per the instructions of Engineer-in-charge.

Note: All information comes from the Internet, please contact delete if it is inappropriate.

The Self drilling anchor tools consist of a drill bit attached to a hollow steel tendon, which is drilled, installed and grouted at the same time, allowing ground improvement, increased productivity and economics.

SDA system is commonly used throughout the civil engineering and tunneling industries. They are used to improve the stability and load bearing characteristics of a rock mass. Within the civil engineering industry, self drilling anchor tools are used for fixing rock netting, slope stabilization, stanchion bases and rock fences. Self drilling anchor tools are also used in structural repairs on retaining walls, bridge spandrel walls and tunnels. In the tunneling industry, SDA systems are used for horizontal fore-poling, slope stabilization at the tunnel portal and for anchoring large section tunnels with high side walls.

      Advantage of Self drilling anchor tools

      • Greater productivity than conventional systems

      • No casing required in collapsing ground conditions

      • Unlimited service life

      • Composed of high yield, low carbon steel

      • Suitable for all ground conditions

      • Can be either passive or stressed

• SDA soil nails R25 to R51N

Soil nailing is a construction method used to maintain or increase the stability of soils by installing reinforcing elements (nails) according to the principles for the execution of geotechnical works. The soil reinforced with nails forms a supporting structure.

The nails are primarily subjected to tensile loads. In addition, bending and shear loads may occur as well. The structure must be so designed that the nailing forms a redundant system. One single nail may not serve as the only load-bearing element.

The principles for the application and execution of soil nail systems are specified in the application standard EN 14490: Soil nailing, and include information on the installation of soil nails, soil investigations, construction materials and products, design criteria and installation aspects as well as testing and surveillance of soil nail production. In addition, requirements regarding surface preparation, drainage and facing are discussed as well.

• SDA rock nails R25 to R51N

Similar in design to soil nails, rock nails serve to stabilize fractured and fissured rock.

• SDA micro-piles R32N to T111N

The piles are suitable to bridge soil layers with low load-bearing capacities and to lay foundations in deep load bearing soils. Tension micro piles are also used to protect against uplift, to activate effective soil as ballast. In narrow spaces, they are used to strengthen existing structures.

Self drilling anchor bolts are commonly used throughout the civil engineering and tunneling industries. They are used to improve the stability and load bearing characteristics of a rock mass.

Within the civil engineering industry, Self drilling anchor bolts are used for fixing rock netting, slope stabilization, stanchion bases and rock fences. Self drilling anchor bolts are also used in structural repairs on retaining walls, bridge spandrel walls and tunnels.

In the tunneling industry, self drilling anchor bolts are used for horizontal fore-poling, slope stabilization at the tunnel portal and for anchoring large section tunnels with high side walls.

The advantages

The advantages of the Self-drilling system are:

       • Variable applications.

       • Especially advantageous in rock/soils with low cohesion.

       • Simple to install in unstable boreholes.

       • No stalling when drilling across clefts.

       • Drilling and installation in one cooperation.

       • Grouting assured over full depth of the borehole.

       • No need to extract drill strings.

The main applications of Self Drilling Anchor Systems in Tunnel Construction

Self-drilling spiles • For stabilization ahead of working face • For safeguarding operations at the working face	Rock bolts • Anchoring system can accommodate rock pressure • Local stabilization of blocks and fault zones • Follow-up rock stabilization	Tunnel face anchors • Stabilization of working face in squeezing rock masses. • Stabilization of working face when using pipe umbrellas	Tunnel floor reinforcement • For strengthening the base of the tunnel arch

Soil nailing is a construction method used to maintain or increase the stability of soils by installing reinforcing elements (nails) according to the principles for the execution of geotechnical works. The soil reinforced with nails forms a supporting structure.

The nails are primarily subjected to tensile loads. In addition, bending and shear loads may occur as well. The structure must be so designed that the nailing forms a redundant system. One single nail may not serve as the only load-bearing element.

The principles for the application and execution of soil nail systems are specified in the application standard EN 14490: Soil nailing, and include information on the installation of soil nails, soil investigations, construction materials and products, design criteria and installation aspects as well as testing and surveillance of soil nail production. In addition, requirements regarding surface preparation, drainage and facing are discussed as well.

• Low-noise percussion drilling.

• No separate system installation, no casing and rod removal required. The drill bit remains in the ground serving as a spacer.

• Choice of drill bits for the most diverse ground conditions.

• Identical installation principle for all ground conditions and systems.

• The hollow core anchor rod serves not only to flush the borehole with air or water during drilling, but also to grout voids and to carry out high-pressure injections of the annular space.

• Choice of high-quality grouts and mixers.

• Flexibility in length by using couplers.

• Ability to work with small drill rigs without casing in narrow spaces.

• Enhanced corrosion protection.

• The high standard of QA systems consistently ensures high quality from production to installation of the injection anchors/piles.

• National and European approvals with CE marking.

• Drill bits of various diameters and types (as suitable for the respective ground).

• Hollow core anchor rods of various diameters with a continuous rolled left-hand thread and available in standard lengths of 1 m, 2 m, 3 m, 4 m and 6 m.

• Couplers to connect and extend the hollow core anchor rods, with center stop for enhanced energy transfer and sealing.

• Solid plates or domed plates for connection to the structure.

• Hexagonal nuts for anchoring and locking.

To ensure thread ability, the thread surface of the accessories may remain un-galvanized. Should small voids become visible on the anchor nut end facing towards the bar, these must be filled with zinc dust paint.

Agt, which is the percentage total elongation at maximum force, is that measure of elongation which excludes that considerable and highly localized extension of the steel under test in the area of plastic instability adjacent to the point of fracture.

Ductility is a measure of the degree of plastic deformation that has been sustained at fracture. A material that experiences very little or no plastic deformation upon fracture is termed brittle. The value of Agt can denote the ductility. For the sake of safety, the minimum number of 5% Agt is required for all Slef Drilling Anchor bars. Sinodrills guarantees minimum 6% in Agt.

Drilling tools are applied in many scenarios in tunnelling engineering, including blasthole drilling, pre-grouting, rock reinforcing, etc. Different scenarios require different features of the drilling tools.

We offer drilling tools for rock drilling, crushing duties and self-drilling anchors for pre-supporting with reasonable price and reliable performance.

Parameters

Size	O.D (mm)	I.D (mm)	Ultimate Load (kN)	Yield Load (kN)	Weight (kg/meter)
T30-11	30.0	11.0	320	260	3.3
T30-14	30.0	14.0	275	220	2.9
T30-16	30.0	16.0	245	190	2.7
T40-16	40.0	16.0	660	525	7.1
T40-20	40.0	20.0	540	425	5.6
T52-26	52.0	26.0	930	730	10
T73-56	73.0	56.0	1035	830	10.8
T73-53	73.0	53.0	1160	970	14
T73-45	73.0	45.0	1600	1270	17.5
T103-78	103.0	78.0	2270	1800	25
T103-51	103.0	51.0	3660	2670	44
Thread direction: Left hand / Right hand
Thread standard: ISO10280 / ISO1720 / Other international standards

Our booth is located in Hall 6, Booth C9,10. We will display our full range of rock drilling tools and our professional team will be present to answer your questions, provide detailed product information and technical support.

We hope that we can communicate with our new and old customers through this exhibition, share our products and discuss future cooperation opportunities. We warmly welcome you and look forward to seeing you at the show.

During the exhibition, our booth attracted numerous existing customers who visited to show their support. They acknowledged our continuous efforts in product quality and technical services. These discussions with our long-standing customers about ongoing cooperation and future plans have laid a solid foundation for our long-term development in the European market.

At the same time, many new customers showed a keen interest in our products and services. They engaged in in-depth discussions with our professional team at the booth and expressed their intention to collaborate, creating opportunities for further expansion in the European market.

Through this exhibition, SINODRILLS has further strengthened its presence in the European market and expanded its customer base. In the face of future market competition, SINODRILLS remains committed to providing the highest quality rock drilling tool solutions to all our customers. We look forward to achieving even greater success in the European market!

Our booth became a focal point at the exhibition, attracting numerous customers and industry experts who expressed great interest in our products and services. Through in-depth discussions, we gained valuable insights into local market demands and trends. We also established initial cooperation intentions with several customers, laying a solid foundation for future business collaborations.

This exhibition not only demonstrated SINODRILLS' strength in the rock drilling tools industry but also strengthened our connections with the local market. We sincerely thank every customer and partner who visited our booth and look forward to maintaining close relationships with each of you in the future.

SINODRILLS will continue to uphold the principles of professionalism, innovation, and excellence, constantly improving the quality of our products and services to provide better rock drilling tool solutions for our global customers. Let’s work together to create a brighter future!

As China's leading exporter of rock drilling tools, we will showcase a full range of rock drilling products to meet diverse customer needs at this exhibition. Additionally, our professional team will provide personalized solutions to meet specific customer requirements.

We sincerely invite every customer to visit our booth and discuss potential cooperation. Looking forward to meeting you at the exhibition.

As China's leading exporter of rock drilling tools, we will be showcasing our complete range of rock drilling tools and offering tailored product solutions throughout the exhibition. The professional team at SINODRILLS is committed to meeting the specific needs of each client with personalized product offerings. Whether you are seeking cost-effective solutions, require comprehensive rock drilling tools, or are exploring partnership opportunities, we eagerly await the opportunity to engage with you in person.

We cordially invite you to visit us at Booth 5A-G016 during INTERMAT 2024!

During the exhibition, in addition to showcasing a complete range of rock drilling tools, Guizhou SINODRILLS' professional team will also provide customized product solutions tailored to your specific needs. Whether you are seeking cost-effective products, a one-stop drilling tool supplier, or simply wish to connect with us, we eagerly anticipate the opportunity to engage with you face-to-face.

Guizhou SINODRILLS is excited about the prospect of meeting you and discussing potential business opportunities and future collaborations.

Throughout the exhibition, our booth attracted a continuous flow of visitors, including many professionals who came to exchange ideas with us. The expertise we demonstrated during the discussions was highly recognized by the visitors. In addition, we had in-depth negotiations with multiple customers during the exhibition and successfully signed several orders. This exhibition not only helped us establish closer relationships with our customers but also laid a solid foundation for our product expansion in Russia and surrounding markets.

In the future, we will continue to strive to provide our customers with better quality products and services, and work hand in hand with every customer for common development.

We warmly welcome you to visit our booth and meet with us during the exhibition. Our team will be on hand to provide information and answer any questions you may have about our products and services.

We are confident that our participation in Mining World Russia 2023 will be a great success, and we look forward to meeting you at our booth, Pavilion 1 Hall 1, A3043. See you there!

Although at this special time, overseas customers were unable to visit due to the travel restrictions, it still attracted more than 3000 domestic exhibitors, which reflects the stable recovery of the domestic mining & construction industries. Under such circumstance, it also urges SINODRILLS to continuously upgrade products and improve service to optimize and enhance product competitiveness.

Despite the COVID-19 has had a short-term negative impact on the industry this year, we will continue to serve customers with efficient and excellent products as always. Hand in hand with every customer to forge ahead and develop together in adversity.

For over two decades, we have adhered to the business philosophy of “drill more, drill globally,” continuously innovating technology and optimizing products. Through relentless efforts over more than 20 years, we have earned widespread recognition and trust in the international market. Receiving the Euromonitor certification is a significant acknowledgment of our hard work and outstanding achievements over the years.

In today’s increasingly competitive global market, our ability to maintain a leading position in the rock drilling tools export industry is inseparable from the strong support of every customer and partner. It is your trust and cooperation that have shaped us into what we are today, and it will inspire us to continue forward toward a more brilliant future.

Looking to the future, we will continue to focus on technological innovation, remain true to our original aspirations, forge ahead, enhance product quality, and provide superior rock drilling solutions to global customers.

Time: In January, 2014.

Mine & Project: Bingham Canyon Mine

DTH Drill Rig Model: DM45 HP & DML

DTH Hammer Model: SINODRILLS QL60 quick hammer & World famous brand A QL60 shank hammer

Rock Formation: Rock conditions vary widely, from mild rock (not very abrasive) to very hard and very abrasive.

DTH Button Bits Configurations: QL60 171mm, 10 gauge buttons x 18mm, 10 face buttons x 18mm, two flushing holes.

Our three pieces of QL60 171mm button bits had been tested from the 7th to 20th of January, as below, it was the summary for the drilling test.

As below, it was our # 1 bit detailed drilling record from the site.

Remarks: Red box: with SINODRILLS brand QL60 quick hammer, 0.68 m/Min average speed;

Yellow box: with world famous brand A QL60 shank hammer, 0.55 m/Min average speed.

As below, it was the summary from the site manager about SINODRILLS DTH button bits:

Drill machine: KS-668 Hydraulic DTH drill machine, it is made by Kongshan China. The maximum rotation speed is 70 Rpm, and the maximum torque is 3680Nm.

Working pressure: The working pressure is 18Bar.

Rock condition: Granite

DTH hammer: GSE DHD350, Outer diameter is 126mm, the recommended wear sleeve discard diameter 114mm. The current diameter is 113mm

DTH bit: DHD350Ø140mm DTH bits, Flat front, Spherical buttons, 8x17mm gauge buttons, 7x14mm front buttons, 2 flushing hole, 35°gauge button angle.

As a kind of hard rock, granite wears the rock drilling tools very seriously. Therefore, the quality requirements of the drilling tools are also higher. Recently, our new generation of GSE DHD350 hammer has been well received by customers during its use. Our hammer completed 4900 meters of granite drilling without replacing the outer tube, and the working pressure was 18 bar. It proves the excellent performance of our products once again.

As a leading enterprise in the modern rock drilling tools manufacturing industry, SINODRILLS deeply values its employees as one of the company's most precious assets. In addition to routine health checks, this health examination included over 30 detailed specialized assessments. Furthermore, tailored examinations were designed based on the physiological characteristics of male and female employees. The primary objective was to empower employees with a comprehensive understanding of their health status and equip them with the knowledge of essential health management measures, thereby enhancing their self-care awareness.

SINODRILLS has consistently upheld the concept of sharing achievements, and this health examination is also a part of that shared success. It aims to enable employees to partake in the company's accomplishments. We will continue to provide an even more superior working environment and extensive career development opportunities. Together with all SINODRILLS employees, we are committed to shaping a brighter future.

Time: in August, 2013

Mine & project: Rio Negro, gold mining

DTH Drill rig: Atlas Copco ROC L6

DTH button bits configurations: DHD340A 115mm, flat face, hemi-spherical buttons,2 flushing holes;

Rock formation: Brecciated silica with clay matrix and disseminated sulfide mineralization, detailed photos as below:

Average life span of our DHD340A 115mm DTH button bits: 480 meters;

Average life span of a world famous brand A’s DHD340A 115mm button bits: 520 meters;

Considering different prices from our company and the world famous brand A, as below, the chart shows a drilling cost comparison between our brand and world famous brand A.

As below, here are some pictures about our DHD340A 115mm button bits performance:

Rock drill model: Pneumatic drill

Test place: Ecuador--El Oro, Azuay, Zamora

Test model: Taper bit, 11 degree, 38mm, 5*9mm, 2*7mm, short skirt.

Hole depth: 1.2m.

The taper bit after using.

The golden taper bit with 1 front hole and 1 side hole drills 175 holes with 1.2m depth per hole.

The yellow taper bit with 2 front hole and 1 side hole drills 170 holes with 1.2m depth per hole

The yellow taper bit with 1 front hole and 1 side hole drills 160 holes with 1.2m depth per hole.

Mexico trademark Certificate                                                          Peru trademark Certificate

Since its establishment 20 years ago, the company Guizhou Sinodrills Equipment Co., Ltd. has been continuously improving its competitiveness and brand image. While the overseas market share is increasing year by year, the "SINODRILLS" brand has also become the first choice of more and more overseas customers. The successful trademark registration of our company overseas not only allows the "SINODRILLS" brand to get strong protection from the corresponding countries, but also marks an important milestone in our company's brand building.

Colombian trademark Certificate                                                         Chile trademark Certificate

In the future, we will continue to activate the brand potential, keep continuous independent innovation, enhance the brand value with good product quality and strive to provide customers with better products and services.

During the visit, our general manager led the group to visit the exhibition hall of Guizhou Sinodrills Equipment Co., Ltd., office space and visit the factory production workshop via video calling. At the same time, he gave a detailed report on the current situation of the company, business segments and overseas sales. In the subsequent discussion and exchange meeting, leaders at all levels had a detailed exchange with our management team and gained an in-depth understanding of our development history, operation, R&D investment, and development planning.

At the meeting, the leaders fully recognized our company’s achievements in the past almost 20 years of development and introduced Wuxue City’s investment policy for our company in detail, and made in-depth communication about the land use and project cooperation, and reached a preliminary cooperation agreement.

In addition to the regular physical checkups, blood testing, occupational disease examinations and other items, the program was also customized with high-end items according to the physiological characteristics of men and women, so that all employees can have a more comprehensive understanding of their physical health and enhance their self-care awareness.

Our company has always adhered to the business philosophy of “co-creation and sharing”, and has put this philosophy into practice. As one of the regular work, the staff physical examination also allows all people in SINODRILLS to share the achievements made by the company.

“Born as a summer flower and living as brave as Mulan”. No matter what roles women play and where they live, they have demonstrated responsibility and commitment with their own contributions. Soft shoulders carry heavy responsibilities and women take their roles. With hard sweat and unremitting struggle, women “hold up half the sky” in their careers and families, and make their own extraordinary achievements. 

On the occasion of this holiday, we would like to deliver our gratitude to each female compatriot for your contributions and wish you all a happy holiday!

self-drilling anchor system increase the load-bearing capacity of the entire structure and act as a group of elements, withstanding tensile and shear forces acting on the self drilling anchor system. The center-to-center distance of nails must be chosen so that they are able to act as a complete nailing system. Prior to nail installation, the excavation face is generally supported by shotcrete, precast concrete elements, mesh, or geotextiles. The design of a nail head construction depends on the application and the intended lifetime of the structure.

SINODRILLS R Thread Self drilling hollow anchor bars (IBO)

Pile Foundation	Uplift Control	Abutments

Pile foundation systems either consist of single piles or a group of piles which are connected to each other by a pile cap structure. Micro piles are typically used for underpinning of civil structures, especially under limited space conditions or time constraints. By definition, micro piles consist of tubular steel elements with an outer diameter range of approx. 60 - 200 (mm). In general, micro piles act as a passive foundation system. Hollow bar micro piles are installed self drilling, typically using a large-diameter drill bit. Installation is accomplished with rotary or rotary-percussive drilling equipment, depending on the ground conditions and the intended installation length. Filling/grouting of the borehole is either performed simultaneously while drilling or afterwards. The grout serves as bonding medium which transfers the forces to the soil in terms of skin friction. Larger grout coverage also enhances the corrosion protection of the system.

Fields of Application

Rock Fall Protection	Portal Stabilization	Slope Stabilization

The basic concept of soil or rock nail is based on the installation of longitudinal reinforcement elements into the ground. Hence, this load-bearing system significantly differs from ground anchors (actively tensioned) and tensile piles, as the nail is installed un-tensioned (passive system). Consequently, self-drilling anchor system increase the load-bearing capacity of the entire structure and act as a group of elements, withstanding tensile and shear forces acting on the self drilling anchor system. The center-to-center distance of nails must be chosen so that they are able to act as a complete nailing system. Prior to nail installation, the excavation face is generally supported by shotcrete, precast concrete elements, mesh, or geotextiles. The design of a nail head construction depends on the application and the intended lifetime of the structure.

Conventional nail systems consisting of solid threaded bars are installed into pre-drilled holes and subsequently grouted. Self drilling anchor system used as soil nails are installed self-drilling, and are either grouted simultaneously during drilling or afterwards.

1, Ancho bit	2, Anchor bar	3, Anchor coupler	4, Anchor plate	5, Anchor nut

Beside this standard usage, the system is often applied to increase stability in portal sections and for the re-excavation of collapsed sections in underground construction. Another application area is ground improvement and waterproofing in combination with all tunnel construction methods.

Fields of Application

Main Advantages

RC drilling uses a drill bit that features round, protruding tungsten-carbide buttons, to cut through hard rock and earth. The drill rods themselves are hollow and feature an inner tube with an outer barrel (similar to air core drilling).

A pneumatic reciprocating piston (also known as a down hole hammer) delivers rapid impacts to the drill stem, transferring this energy through the drill bit. This extra concussive force hammers the bit into the rock, pulverizing it, while a rotational device ensures that the drill bit hits new sections of rock with each impact.

Inside the drill bit, a dual-walled drill pipe is used to achieve circulation, with compressed air getting injected between the tubes to flush the cuttings from the hole and up through the inner tube. The cuttings travel back up the tube to the surface, into a cyclone, where they go over a splitter that delivers the samples into a sample bag.

The exploration team then collects the samples, align them to the hole depth, and layout for their client to log. From here the sample is transported to their lab for assay.

RC drilling is commonly employed in open-cut mines and used for pit grade control and in delivering useful insight for mine planning and blasting. It has an optimal depth of between 300-500 metres.

RC grade control is extremely effective in defining boundaries between ore bodies and waste rock

RC drilling is ideal for exploration, as it delivers contaminant-free samples, which are collected at the drill itself and can be sent immediately for assessment. It also reduces handling time, which in turn can serve to reduce overall program costs.

The Australian Centre for Geomechanics (ACG) has developed a training and safety guide for miners to properly conduct drilling and blasting operations underground.  

The video displays the process of underground drilling and blasting from beginning to end. It also provides the safest techniques for drilling and blasting, including a wealth of safety tips. In addition, the video provides real-life underground drilling and blasting footage.

Based at The University of Western Australia in Perth, the Australian Centre for Geomechanics is a non-for-profit mining research center. The organization’s mission is to provide the mining industry with the necessary tools and knowledge for safe mining.

This partnership will bring together the two companies’ expertise in the field to address the growing demand from customers mining in increasingly hazardous and challenging underground conditions.

Together, the companies will combine theri wireless initiating system and automation strategies in the first steps to achieving their vision of automated drill and blast operations.

The companies expect the first prototype system in 2020, with the first commercially available systems to come into service in 2021.

As mine operations go deeper and ore bodies become more remote, implementing blasting automation becomes more necessary to keep up with the growing demand for commodities.

“Automation is a key pillar of our technology strategy and supports our vision of transforming drill and blast to unlock mining value by creating safer and more sustainable operations,” This famous company said.

These are some of the key findings from the 'Staying ahead of the game' report, released by Industry Growth Centres METS Ignited and NERA (National Energy Resources Australia). Prepared by AlphaBeta, the report looks to understand the positive impact new technology could bring to the local sector.

"There is a real and immediate opportunity, Australia has the right foundation and experience to create a highly competitive resources technology ecosystem, contributing more jobs and growth to our economy," said METS Ignited CEO, Adrian Beer.

"As an industry, we must focus on having the right framework in place to realise this vision: actively upskilling our workforce for their future roles; strengthening collaboration among industry, government and education providers; investing more in commercially-orientated research and development".

Automation has been in the sector for some time, however the next wave of growth will come from the widespread adoption of Industry 4.0 technology. Australia's METS companies are well placed to lead this next phase.

"The growing use of digital technology creates additional social and economic benefits for the broader community as well. We will see significant environmental advantages, improvements in workplace health and safety outcomes, and further investment in regional centres and local technology providers if our industry acts now".

NERA CEO Miranda Taylor said the report findings indicate a critical opportunity for Australia's resources industries to take the actions needed to ensure they can translate automation and robotic technologies into real employment and productivity advantages.

"As part of the Industry Growth Centres Initiative, we have a mandate to ensure Australian industry adapts to rapidly changing technology and emerging workforce trends. This report demonstrates the transformative effects that new technologies have and will continue to exert across industry supply networks and the enormous benefits that flow from supporting and integrating innovation. Just as importantly, it also highlights the very real consequences at a national level, if we fail to, or are too slow in harnessing the value that new technologies present us," Taylor said.

"To ensure Australia leads, in taking up this automation opportunity, we must continue to inform and support our sectors about future workforce and skill requirements. Sector-wide collaboration is critical to addressing workforce planning issues, widening and deepening the pipeline of appropriately skilled personnel, cementing a culture of R&D investment and growing our entrepreneurial ecosystem to continue commercialising and integrating new technologies."

"To realise this vision, Australia needs to be bold. Policymakers, mining and oil and gas companies, education providers, and researchers need to work together to ensure Australia provides the right environment to thrive in an increasingly competitive globalised environment," said Andrew Charlton, Partner at AlphaBeta.

"If we focus on the right pathway to spearhead this technological progress, mining, gas and oil support systems will continue to be delivered by Australian firms and the jobs will continue to be created in Australia.

"But if we choose to ignore this report, our competitive advantage will severely diminish. If we act now, the total number of jobs can increase and Australia can maintain its competitiveness in the mining, gas and oil industries."

This easy-to-use software system is enabled by Dyno Nobel’s proprietary in-truck control panel, DynoLogix™. This new software system utilizes data from outside sources, such as drills face profiles or other data that characterizes rock properties to allow targeted placement of energy in the blast hole. The ΔE2 system can also send loading instructions directly to the pump truck control system ensuring boreholes are loaded as designed, giving control back to the engineer or blaster.

The ΔE2 system can improve shovel dig rates, improve crusher throughput and lower overall drill and blast costs. Furthermore, this new system improves operator efficiency by simplifying the loading process and allowing explosives’ energy to be accurately placed in the blast hole, thus reducing oversize and/or fines.

The ΔE2 Pre-Load desktop software, part of the new ΔE2 system, allows users to precisely place energy within the shot and can be used by blasters and engineers to optimize energy placement within each borehole in the shot. The system can import data from multiple sources, including data from the Dyno Nobel mobile suite of applications that can create shot designs, to allow users an easy way to control the loading of a blast. Users can view powder factors that can be changed on the fly, which gives the engineer and blaster the ability to understand explosives usage prior to loading the shot, enabling them to control the actual shot cost.

Sharp bits

How quickly a bit will dull varies on its application. In hard abrasive rock. And how do you know when to change out a bit?

When the diameter of the flat area of a worn button on a bit exceeds one-third of the base diameter of the button, you should change it.

We compare a flattened button to a pair of flat-soled shoes, which spread the weight of the wearer across the bottom of the shoe. A rounded button as like a pair of stiletto high heels, which transfer the weight to the surface in a very small area. The smaller the button area touching the surface, the greater the psi and rock-breaking stress brought to bear upon the rock surface. The sharper the bit, the less energy reflection you will get, and the faster the bit will cut the rock.

Balance feed, rotation, percussion

These forces are the key variables, and optimizing them can be aided by watching for such aspects as the size of cuttings coming out of the hole. The chips should be as large as possible, thumbnail-sized ideally. The goal is to minimize the amount of mechanical kinetic energy and heat bouncing back to the drill, while transferring as much energy as possible into the rock to spall and break it.

Drill smart

Set up a rig precisely. If it is supposed to be vertical to the surface, the mast dial should read 90 degrees, not 85. “Close enough” isn’t good enough.

When the drill bit is lowered to the rock surface, ease into the boring. When collaring in, grind out a pocket for the bit to sit in before powering up. Otherwise, the drill head is apt to skew off, producing lateral stress on the string. If loose, unstable material is left over from a prior shooting, proceed carefully, because the unstable rock can easily fall into the hole atop the drill head and become wedged there. If possible, clear away unconsolidated surface material before beginning to drill, because if you can’t hold that hole open, you are in trouble.

A larger diameter drill string

Compared to the diameter of the bit, a large diameter drill string is stiffer and minimizes hole deviation while it maximizes air flushing capacity. This is especially important when drilling in porous material that bleeds off the air.

In using a larger diameter pipe or drill rod, check to ensure adequate clearance is being maintained for cuttings to flow to the surface. With that provision met, the velocity of the flushing airstream is increased or better maintained, it helps the operator maintain a hole to hole cycle time.