Hole collapse prevention reinforced gas extraction device and using method

Abstract

The invention discloses a hole collapse prevention reinforced gas extraction device and a using method. The device comprises an extraction pipeline sleeved with a first battery-shaped plug and a second battery-shaped plug, the first battery-shaped plug and the second battery-shaped plug are oppositely placed, a hole sealing area is arranged between the first battery-shaped plug and the second battery-shaped plug, one end of a grouting pipe and one end of a slurry return pipe penetrate through the first battery-shaped plug and penetrate into the hole sealing area, the other end of the grouting pipe and the other end of the slurry return pipe are correspondingly connected with a first valve connector and a second valve connector, the first valve connector is located at the bottom of a grout injection and return device, and the second connector is located on the side face of the grout injection and return device. A round plate on the first battery-shaped plug is extruded, so that a part of paste permeates into coal seam hole cracks, tight adhesion and attachment of the round plate and a coal seam are achieved, the first battery-shaped plug and the second battery-shaped plug achieve the purpose of supporting drill holes in the two sides of the hole sealing area, the first valve connector is opened, a stirring blade, a power pump device, a sealing plate and a sealing cover of the slurry injection and return device are regulated and controlled, hole sealing slurry is prepared, the same high pressure is applied to slurry in a slurry return tank body and a stirring tank body, the slurry on the two sides is forced to rush to a plugging area, hole cracks in a coal seam are better filled, slurry recovery and high-pressure filling of the slurry to the drill hole are achieved, and after the slurry is solidified, gas extraction operation is carried out, and the extraction process of the hole collapse prevention reinforced gas is completed.

Description

technical field [0001] The invention relates to an anti-collapse hole enhanced gas drainage device and a use method thereof, which belong to the field of coal mine gas drainage. Background technique [0002] For the production operations of coal mines, we implement the policy of "pumping first and mining later", which can not only fundamentally solve the problem of frequent gas disasters, but also be used as clean energy to optimize my country's energy consumption structure. However, the compactness of the sealed holes will seriously affect the concentration and efficiency of gas drainage. There are many factors that affect the compactness of the sealed hole, one of which is that after a period of gas extraction, when the coal wall around the borehole is subject to new stress changes, the boreholes on both sides of the plugged area will collapse, and the hole will pass through the plugged area. The inner and outer sides of the plugging area greatly reduce the concentration ...

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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