Combined hole sealing method for gas extracting and drilling delaying self-expansion capsule-paste

A gas extraction and self-expansion technology, which is applied in gas discharge, mining equipment, earth-moving drilling, etc., can solve the problem that the gas extraction drilling and sealing process cannot achieve a better extraction effect, and improve the extraction effect. , easy to operate, improve the effect of air tightness

Inactive Publication Date: 2012-08-15
CHINA UNIV OF MINING & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem that the existing gas drainage drilling and sealing process cannot achieve a better drainage effect, the present invention provides a gas drainage drilling delay automatic Expa...

Method used

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  • Combined hole sealing method for gas extracting and drilling delaying self-expansion capsule-paste
  • Combined hole sealing method for gas extracting and drilling delaying self-expansion capsule-paste
  • Combined hole sealing method for gas extracting and drilling delaying self-expansion capsule-paste

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Embodiment Construction

[0017] In the figure, the self-expanding capsule-paste combination sealing device for gas drainage drilling includes drilling 1, self-expanding capsule a 2, self-expanding capsule b 3, single valve 4, filling cavity 5, extraction pipe 6, Injection plug 7, injection pipe 8, orifice 9, cement mortar cavity 10, grouting pipe 11, O-shaped sealing ring 12; the operation steps of the gas drainage drilling time-delay self-expanding capsule-paste combination sealing method are as follows: :

[0018] (1) Drill the gas drainage borehole 1 to the depth of the final hole with drilling tools, and then pull out the drilling tools;

[0019] (2) Inject water into self-expanding capsule a 2 and self-expanding capsule b 3 respectively through the one-way water injection port of the capsule, and quickly send self-expanding capsule a 2 , self-expanding capsule b 3 and extraction pipe 6 into the borehole 1;

[0020] (3) Self-expandable capsules a 2 and self-expandable capsule b 3 react wi...

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Abstract

The invention relates to a combined hole sealing method for gas extracting and drilling delaying self-expansion capsule-paste. The technical scheme is that two delaying self-expansion capsules are adopted to plug a hole bottom and a hole opening; an annular space between the two capsules is full of paste hole sealing material with pressure so as to further seal cracks around a drilled hole; and therefore, the gas tightness of the gas extracting and drilling is guaranteed. According to the combined hole sealing method for the gas extracting and drilling delaying self-expansion capsule-paste, the gas tightness of the coal mine gas extracting and drilling is improved, the extraction effect can be enhanced, and the later-stage extraction effect is obviously improved. The combined hole sealing method for the gas extracting and drilling delaying self-expansion capsule-paste has the advantages of simple technology, is convenient to operate and the like.

Description

technical field [0001] The invention relates to a gas drainage drilling hole sealing method, in particular to a gas drainage drilling time-delayed self-expansion method suitable for the sealing operation of gas drainage drilling holes in soft, broken and easily deformable rock (coal) layers Capsule-paste combination sealing method. Background technique [0002] Mine gas accidents are one of the most serious hazards in coal mine safety production. In the process of coal mine production, if the gas is not properly controlled or managed properly, catastrophic accidents are likely to occur. At present, mines threatened by gas disasters in my country (especially high gas mines) have generally adopted the method of pre-pumping gas to prevent gas disasters. The coal mine gas drainage boreholes include the coal seam drainage boreholes and the upper (lower) adjacent layer drainage boreholes, and because the natural occurrence forms of coal seams are various, these gas drainage boreh...

Claims

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Application Information

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IPC IPC(8): E21F7/00E21B33/10
Inventor 李增华葛泉杨永良李雨佳徐伟刘震岳克明
Owner CHINA UNIV OF MINING & TECH
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