A gas extraction borehole plugging device and using method

Abstract

A gas drainage borehole plugging device and a method for using the same. The device comprises a gas drainage pipeline sheathed with a 'flat ball'-shaped plugging device 1 and a 'flat sphere'-shaped plugging device 2, and the two ends of the plugging area are flat sphere drills. Hole 1 and spheroid bore hole 2. The upper and lower ends of the gas drainage pipeline are the grouting pipeline and the grouting pipeline respectively. The other ends are respectively connected to valve one and valve two. Send the gas drainage pipeline into the borehole, so that the oblate bag 1 and the oblate bag 2 are located in the center of the oblate spheroid borehole 1 and the oblate spheroid borehole 2, respectively. 2. When the oblate sphere hole 1 and the oblate sphere hole 2 are expanded and filled, the W-shaped diaphragm of the 'oblate sphere'-shaped plugging device can support the drill holes on both sides of the plugging area, and control the valve 1 and valve 2 to move toward the Confined space grouting to achieve pressure filling and complete effective sealing of gas drainage boreholes.

Description

technical field [0001] The invention relates to a gas drainage borehole plugging device and a method for using the same, belonging to the technical field of underground gas control in coal mines. Background technique [0002] Gas extraction is the fundamental solution to the frequent occurrence of gas disasters in coal mines. The tightness of the plugging of the boreholes seriously affects the gas drainage effect, thereby increasing the risk of gas disasters. During the construction of gas drainage drilling, high-pressure grouting will easily lead to the detachment of the sealing pockets on both sides, and after the gas drainage drilling is constructed, the drilling holes on both sides of the sealing area will collapse, which will greatly reduce the drilling cost. The tightness of the hole sealing affects the gas drainage efficiency. How to solve the above problems and realize the prevention and control of the tight filling of the boreholes and the collapse of the borehole...

AI Technical Summary

Problems solved by technology

[0003] Technical problem: the purpose of the present invention is to solve the problems existing in the prior art, especially the problem that high-pressure grouting easily leads to the falling off of the sealing bag on both sides and the collapse of the drilled holes on both sides of the blocking area, and provides a Seed Gas Drainage Borehole Plugging Device and Application Method

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