Abstract
With the continuous popularization and application of TBM equipment and technology in the field of coal mine, aiming at the problems of small torque and small propulsion of existing TBM advanced exploration drilling rigs for coal mine, which is difficult to drill long borehole, and lack of special high-power drilling equipment to match with it, a high-power drilling rig for coal mine TBM is developed. This paper introduces the structure of the drilling rig, analyzes the structure and principle of the luffing mechanism and the rotary table protection device, also the strength of the key parts. Through the application in Guineng Group Heilaga Juxin coal mine shows that this equipment has large torque and propulsion, the hydraulic system and operation mode meet the requirements of long-distance separate layout in TBM. The drilling rig has good stability and high efficiency, and can meet the various needs of long drilling for advanced exploration, which promotes the application of TBM equipment and technology in the field of coal mine.
Highlights
In recent years, the drivage efficiency of rock roadways has become an important factor restricting the high-efficiency and high-quality development of the coal industry
The rotary head is equipped with a hydraulic chuck, which can clamp the drill pipe and provide drilling rotation power; the clamper is used to clamp the drill pipes in the hole, and cooperates with the rotary head to accomplish the screwing and unloading of the drill pipe thread; the cylinder of the propulsion device can drive the rotary head to reciprocate along the guide rail, which is provide the drilling pipe with propulsion force or pulling force; the luffing mechanism is used to adjust the circumferential angle, main shaft angle, working radius and other parameters to meet the requirements for drilling hole
Since the drilling rig is still some distance away from the hole, in order to reduce the shaking of the device during high-speed drilling, a set of hydraulic diagonal shore mechanism is designed between the rack unit and the propulsion device, which is mainly composed of diagonal poles and hydraulic chuck
Summary
The drivage efficiency of rock roadways has become an important factor restricting the high-efficiency and high-quality development of the coal industry. The tunneling construction in coal mines has such problems as large construction depth, complicated geological conditions, and the difficult to accurately predict the exploration in the early stage. For these reasons, Chinese government has made a mandatory requirement of "exploration at every excavation, first exploration and excavation". Inclination affects the accuracy of advanced exploration These problems greatly restrict the popularization and application of TBM equipment in coal mines. DEVELOPMENT AND APPLICATION OF HIGH-POWER ADVANCED EXPLORATION DRILLING RIG FOR COAL MINING TBM. It can support with various construction techniques such as rotary drilling, pneumatic percussion drilling, and hydraulic percussion drilling [4-10]
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