Complete equipment for transverse large-diameter hole forming in soft coal seam coal pillar area and hole forming technology

Abstract

The invention relates to complete equipment for transverse large-diameter hole forming in a soft coal seam coal pillar area and a hole forming technology. The complete equipment comprises a high-torque drilling machine, a holing drilling tool and a reaming drilling tool, wherein the high-torque drilling machine comprises a guide rail assembly, a stable drilling support assembly and a drilling androtating device; the stable drilling support assembly is installed on a large rotation plate of the high-torque drilling machine to provide support for a drilling machine in the drilling process; thedrilling and rotating device is installed on the guide rail assembly, and drives the holing drilling tool to rotate according to the drilling process to achieve high-speed drilling or driving the reaming drilling tool to rotate to achieve low-speed high-torque back reaming; the guide rail assembly is installed on the stable drilling support assembly, can adjust the drilling position and directionof the drilling and rotating device and provide required pulling force for back reaming of the drilling and rotating device. The hole forming technology comprises a holing process and a back reaming process. The problems of difficult operation, low efficiency, low hole forming rate, high labor intensity and the like in transverse large-diameter hole forming in the soft coal seam coal pillar can beeffectively solved.

Description

technical field [0001] The invention belongs to the field of complete sets of equipment for underground coal mines, and in particular relates to a complete set of equipment for forming large-diameter holes in the coal pillar area of ​​a soft coal seam and a hole-forming process. Background technique [0002] Gobs will be formed after the coal seam is mined underground in the coal mine, and the upper corner gas will be formed because the gas will flow and accumulate in the goaf during the coal seam mining process. There are many control methods for gas in the upper corner, among which the method with low economic cost and good control effect is to use large-diameter holes in the coal pillar area, and install gas drainage pipes in the holes for goaf gas drainage. [0003] Large-diameter reaming in the coal pillar area of ​​soft coal seams often adopts forward drilling of large-diameter holes. After the drilling is completed, the drilling tool is removed and then the forward pu...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a complete set of equipment for forming large-diameter holes in the coal pillar area of ​​the soft coal seam and a hole-forming process to solve the problems of difficulty in forming large-diameter holes in the coal pillar area of ​​the soft coal seam and low efficiency in coal mines

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