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Enlightenment of Sandvik AutoMine System Development on the Rock Drilling Tool Industry
The comprehensive popularization of automation and unmanned mining has completely transformed traditional rock drilling modes and put forward new and stringent requirements for the performance, standards, and structural forms of rock drilling tools — the core supporting consumables for underground mining
AutoMine® is a professional automated remote control platform for mining equipment developed by Sandvik. As one of the earliest and most widely deployed intelligent unmanned mining solutions worldwide, the system has been successfully applied in numerous key domestic and overseas mining projects, including the Glencore Zinc Mine in Australia, Codelco Copper Mine in Chile, Norilsk Nickel Mine in Russia, Vareš Silver Mine in Bosnia and Herzegovina, and Shandong Gold Xincheng Gold Mine in China. The comprehensive popularization of automation and unmanned mining has completely transformed traditional rock drilling modes and put forward new and stringent requirements for the performance, standards, and structural forms of rock drilling tools — the core supporting consumables for underground mining.
I. Core Technical Requirements for Rock Drilling Tools under Mine Automation
1. Standardized Dimensional Accuracy Adaptable to Automatic Rod Changing
Supported by underground industrial private networks, 3D geological models and safety access control systems, the AutoMine system realizes unmanned operations including autonomous hole layout and robotic automatic rod changing. The consistency of thread parameters and dimensional tolerances of rock drilling tools directly determines the success rate and efficiency of automatic replacement. Substandard dimensional and thread accuracy may lead to manipulator docking failures and jamming during assembly and disassembly, which will interrupt continuous unmanned mining. Therefore, a high-precision and standardized dimensional system serves as the fundamental prerequisite for drilling tools to adapt to automated equipment.
2. Stable and Extended Service Life to Support Continuous Unmanned Production
Unmanned working faces adopt physical isolation, making on-site part replacement and fault inspection impossible. Accordingly, rock drilling tools must feature longer and more stable service life to ensure round-the-clock uninterrupted production. Specialized supporting products for AutoMine systems, including Autobit drill bits, high-strength drill rods and shank adapters, require comprehensive upgrades covering steel and cemented carbide selection, structural design, precision machining, heat treatment and anti-corrosion processes.
Taking the upgrading project of a cold-region nickel mine in Russia as an example, the overall upgrading of drilling tools significantly reduced the rod replacement frequency of drill rigs. Meanwhile, the optimization of flushing groove structures effectively solved bit jamming during long-duration continuous drilling, fully adapting to all-weather uninterrupted unmanned mining conditions.
3. High-Precision Drilling Capability to Realize Full-Process Intelligent Operation
The AutoMine system generates precise blast hole parameters based on digital blasting models. Drilling accuracy directly determines blasting effects and further influences ore removal efficiency and overall mine productivity. Automated mines impose extremely high requirements on the accuracy and stability of drilled holes, which can be comprehensively improved through material upgrading, process optimization and structural modification of dedicated drilling tools.
The practical application in Shandong Gold Xincheng Gold Mine fully verifies the value of such upgrades. After the deployment of intelligent specialized drilling tools, the qualification rate of blast holes increased from 76% to 97%, and the boulder yield after blasting decreased substantially. A full-process intelligent operation chain integrating drilling, blasting and ore removal was successfully established, achieving overall quality and efficiency improvement in mining production.
4. Strong Digital Adaptability and Excellent Environmental Resistance
Intelligent unmanned mines are gradually adopting smart drilling tools embedded with RFID, stress and temperature sensors. These tools can collect real-time data on equipment operation and tool wear and transmit data to the central control system, realizing online condition monitoring, early fault warning and digital management of drilling tools. In view of harsh underground environments characterized by high humidity, acidic water seepage and heavy dust, drilling tools are equipped with enhanced overall anti-corrosion treatment and thread anti-sticking processes, fundamentally eliminating automatic assembly and disassembly failures caused by corrosion and slag adhesion so as to ensure stable operation of automated equipment.
II. Five Development Trends of the Rock Drilling Tool Industry Driven by AutoMine System
1. Comprehensive Standardization of Thread and Dimensional Systems
Under automated mining scenarios, the industry will accelerate the unification of core standards for drilling tools, including overall dimensions, matching threads and dimensional tolerances, realizing universal and standardized tool specifications within single mines and the whole industry. This fundamentally solves common problems of non-standard tools such as poor adaptability, frequent automatic replacement failures and low equipment compatibility, laying a standardized foundation for full-mine unmanned and cluster operation.
2. Sensor-Embedded Intelligent Drilling Tools to Become Mainstream
Traditional consumable drilling tools are gradually evolving into digital intelligent products. Sensor-equipped intelligent tools with data acquisition modules can monitor real-time drilling conditions, equipment load and self-wear status, accurately predict remaining service life, assist mines in formulating scientific maintenance plans, and reduce unplanned downtime losses. In the long term, combined with digital twin technology, digital iteration of structural optimization, performance simulation and working condition adaptation will be realized to promote the intelligent upgrading of drilling tool products.
3. Continuous Iteration and Upgrading of New Materials and Processes
To adapt to the high-power, long-duration and continuous impact working characteristics of automated equipment, new materials and processes including gradient cemented carbide, PVD coating, laser cladding and high-strength anti-corrosion technology have been widely applied. Optimized processes balance the surface wear resistance and core impact resistance of drill bits, solving the traditional dilemma of mutual restriction between wear resistance and impact resistance, and enabling the tools to adapt to continuous operation under various complex mining conditions.
4. Accelerated Popularization of Integrated and Modular Assemblies
Centering on the vehicle-mounted rod changing warehouse structure of drill rigs, the industry continues to optimize the overall structure of drilling tools and develop integrated modular assemblies. These assemblies support rapid group replacement by manipulators, greatly shortening rod replacement time and improving operational efficiency. Meanwhile, they cater to the low-cost and lightweight intelligent transformation demands of small and medium-sized mines, lowering the threshold for unmanned upgrading.
5. Big Data-Driven Customized Precision Production
The AutoMine system continuously accumulates key working condition data of each mining area, including rock hardness, abrasiveness and ore body structure, providing solid data support for the customized research, development and production of drilling tools. Manufacturers can precisely match products with actual working conditions: drill bits with large flushing grooves and sparse teeth for soft rock conditions, and high-hardness dense-tooth bits for highly abrasive hard rock. Custom special-shaped tools have significantly improved drilling efficiency in fractured and complex ore bodies in China. In addition, 3D printing technology is gradually applied to small-batch and personalized customization of drill bits for complex mining sections, realizing precise adaptation between products and working conditions.
The continuous iteration of mine automation systems represented by AutoMine is driving disruptive transformation of the rock drilling tool industry. It promotes drilling tools to upgrade from traditional extensive consumables to high-end precision products featuring high precision, long service life, digitalization and modularization. With the accelerated advancement of man-less, unmanned and intelligent underground mining worldwide, standardization construction, intelligent innovation, material and process upgrading, and customized production models will become the core directions for high-quality development of the rock drilling tool industry.
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