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Gas extraction hole-drilling hole-sealing device and hole-sealing method

A technology of gas extraction and hole sealing device, which is applied in gas discharge, safety device, sealing/sealing and other directions, can solve the problems of easy gas blockage, frequent gas leakage, and short effective time for extraction, and achieves increased bearing stress. the effect of strength

Pending Publication Date: 2019-11-15
HENAN POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention provides a drilling hole sealing device for gas drainage and a hole sealing method. The gas drainage drilling sealing device can effectively solve the problems of easy gas blockage, frequent gas leakage and short drainage effective time in gas drainage drilling. And other issues

Method used

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  • Gas extraction hole-drilling hole-sealing device and hole-sealing method

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Embodiment Construction

[0036] Such as image 3 and 4 As shown, a gas drainage drilling sealing device includes a solid drainage pipe body 10 for inserting into a gas drainage drilling hole. The material of the drainage pipe body 10 is polycarbonate PC. The drainage pipe body 10 After being inserted into the borehole, the end at the depth of the borehole is called the deep end 11, and the end at the outer edge of the borehole is called the connecting end 12; The extraction channel 14 and the repairing material channel 15, the extraction channel 14 runs through both ends of the extraction pipe body 10 and both ends of the extraction channel 14 are open, the grouting channel 13 and the repairing material channel 15 are at the connection end 12 of the extraction pipe body 10 Both openings, the other ends of the grouting channel 13 and the restoration material channel 15 are closed, and the extraction pipe body 10 is fixedly sleeved with a sealed and flexible first bladder 16, a second bladder 17, and a...

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Abstract

The invention discloses a gas extraction hole-drilling hole-sealing device and a hole-sealing method. The hole-sealing device comprises an extraction pipe body, a grouting channel, an extraction channel and a repair material channel are formed in the extraction pipe body, and a first bag and a second bag fixedly sleeve the extraction pipe body in turn; a first low pressure slurry outlet and a second low pressure slurry outlet are separately formed in the first bag and the second bag by the grouting channel, and a high pressure slurry outlet is formed in the grouting channel between the first bag and the second bag; a slurry returning port is formed in the extraction channel between the first bag and the second bag; a first repair material outlet and a second repair material outlet are formed in the first bag and the second bag separately by the repair material channel; a third repair material outlet is formed in the repair material channel between the first bag and the second bag; andthe gas extraction hole-drilling hole-sealing device further comprises a hole connection plug. According to the gas extraction hole-drilling hole-sealing device and the hole-sealing method, the problems that gas extraction is prone to being blocked, gas leakage frequently occurs, the extraction effective time is short in gas extraction hole-drilling can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of gas drainage drilling and sealing, and in particular relates to a gas drainage drilling sealing device and a sealing method. Background technique [0002] Gas drainage is the fundamental measure to control coal seam gas disasters. Gas drainage drilling is the carrier of gas extraction. However, after the drilling is completed, the surrounding rock with weak structure will be unloaded due to the drilling. Under the action of the redistributed stress, the rock stratum breaks, and the weak structure produces slip, dislocation and shear deformation along the primary and new fracture planes. Affected by the deformation and damage of the weak structure, the deformation and damage of the surrounding rock in other parts of the borehole intensified, and it was squeezed into the borehole space to cause instability, which manifested as borehole collapse and hole blocking. Therefore, the quality of drainage drilling...

Claims

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Application Information

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IPC IPC(8): E21B33/13E21F7/00
CPCE21B33/13E21F7/00
Inventor 刘晓荆天祥蔺海晓倪小明张小东李定启
Owner HENAN POLYTECHNIC UNIV
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