Rapid pushing and hole sealing method for upward long water injection drill hole in coal seam

Abstract

The invention discloses a rapid pushing and hole sealing method for upward long water injection drill holes in a coal seam. A hole packer, a slurry return pipe, a high-pressure water injection pipe, a pushing pipe formed by splicing a plurality of sections of steel pipes and a steel wire are prepared; a hole packer, a slurry return pipe and a high-pressure water injection pipe are bound into a whole through steel wires, a traction steel wire with the length larger than the drilling depth is bound at a front end of the hole packer, the traction steel wire penetrates through a pushing pipe, and the hole packer is pushed to a preset hole sealing position through the pushing pipe; after the hole packer reaches the preset hole sealing position, the pushing pipe is pulled out, and the hole packer, the slurry return pipe, the high-pressure water injection pipe and the steel wire are arranged in the drill hole; totally six steps are carried out; problems that in upward long water injection drilling, the hole sealing distance is long, the coal (rock) wall of the drilled hole is rough, the inclination angle of the drilled hole is large, and materials such as a hole packer, a slurry return pipe and a high-pressure water injection pipe required for flexible water injection and hole sealing are difficult to feed into the hole to smoothly complete upward deep hole water injection drilling under-pressure hole sealing can be solved.

Description

technical field [0001] The invention relates to the technical field of coal seam water injection drilling and sealing, in particular to a method for quickly pushing and sealing long upward water injection drilling holes in a coal seam. Background technique [0002] In recent years, with the emergence of deep coal mines and highly mechanized and intelligent mining models, the ground stress, gas pressure and content of coal seams have increased significantly. Coal and gas outburst disasters are the main disasters faced by mines, and coal mine gas outburst prevention work is also becoming more and more serious. It's getting tougher. At present, some mines in China adopt the method of coal seam water injection to improve the mechanical properties of the coal body, release the in-situ stress, push the peak value of the stress to the deep, and inhibit the gas desorption, thereby reducing coal and gas outburst disasters. According to the mining conditions of the coal seam, before ...

AI Technical Summary

Problems solved by technology

This will result in a long sealing distance in the rock formation, and the coal (rock) wall of the water injection drilling is rough, and the drilling inclination is relatively large, making it difficult to deliver the materials required for flexible water injection and hole sealing such as the hole sealer, slurry return pipe, and high-pressure water injection pipe. Successful completion of upward deep hole water injection drilling with pressure sealing in the entry hole

Images