A kind of anti-collapse hole strengthening gas drainage device and using method

Abstract

The invention discloses an anti-collapse hole-enhanced gas drainage device and a method of use. The device comprises a drainage pipeline covered with a 'battery'-shaped plug 1 and a 'battery'-shaped plug The second 'battery'-shaped plugs are placed opposite each other, and the middle is the sealing area. One end of the grouting pipe and the slurry return pipe passes through the 'battery'-shaped plug 1 and penetrates into the sealing area. The other ends are respectively connected with the valve interface 1 and the interface. Two connections, the first valve port is located at the bottom of the grout injection device, and the second port is located on the side of the grout injection device. Squeeze the circular plate on the first 'battery'-shaped plug, so that a part of the paste penetrates into the pores and cracks of the coal seam to achieve tight adhesion and bonding between the circular plate and the coal seam. The first 'battery'-shaped plug and the 'battery'-shaped plug The first two achieve the purpose of supporting the holes on both sides of the sealing area. Open the valve port 1, adjust the stirring blade, power pump device, sealing plate and sealing cover of the slurry injection device, prepare the sealing slurry, and pass the slurry return tank. The same high pressure is applied as the slurry in the stirring tank, forcing the slurry on both sides to rush to the blocking area, better filling the pores and cracks in the coal seam, and realizing the recovery of the slurry and the high-pressure filling of the drilling hole with the slurry. Wait for the slurry to solidify After that, the gas extraction operation was carried out, and the gas extraction process of the anti-collapse hole enhanced gas was completed.

Description

technical field [0001] The invention relates to an anti-collapse hole strengthening gas extraction device and a use method, and belongs to the field of coal mine gas extraction. Background technique [0002] For the production operations of coal mines, we implement the policy of 'extract first, then mine', which can not only fundamentally solve the problem of frequent gas disasters, but also serve as clean energy to optimize my country's energy consumption structure. But the tightness of the sealing will seriously affect the gas drainage concentration and efficiency. There are many factors that affect the tightness of the sealed hole, one of which is that after a period of gas drainage, when the coal wall around the borehole is subjected to new stress changes, the boreholes on both sides of the plugging area will collapse, and the plugging area will be penetrated. The gas drainage concentration and effect are greatly reduced on the inner and outer sides of the blockage area...

AI Technical Summary

Problems solved by technology

[0003] Technical problem: The purpose of the present invention is to provide an anti-collapse hole enhanced gas drainage device and its use method for the problems of hole collapse in underground coal mines and lax plugging of boreholes.

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