Coal seam gas extraction method based on controllable impact wave technology

A technology of coal seam gas and shock wave, which is applied in the field of coal seam gas drainage based on controllable shock wave technology, can solve problems such as high cost, poor anti-reflection effect, and lack of safety control, and achieve time saving, good safety control, and increased good see-through effect

Pending Publication Date: 2019-04-05
西安闪光能源科技有限公司 +2
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Problems solved by technology

[0005] In order to solve the technical problems of high cost, poor anti-reflection effect and lack of safety control in the existin

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  • Coal seam gas extraction method based on controllable impact wave technology
  • Coal seam gas extraction method based on controllable impact wave technology
  • Coal seam gas extraction method based on controllable impact wave technology

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Embodiment Construction

[0045] The present invention will be further described below in conjunction with accompanying drawing.

[0046] The present invention is based on the controllable shock wave technology for coal seam gas drainage, and the controllable shock wave generating device 5 is gradually exiting the anti-reflection borehole 6 under the control of the drilling rig. Points in turn conduct shock wave anti-reflection operations. The definition of controllable shock waves is that the amplitude and impulse are controllable, as well as the controllable area of ​​action and the number of repeated actions. Through the control of the controllable shock wave intensity and area, the pores can be connected, expanded and extended without destroying the borehole, forming an interwoven three-dimensional network, thereby achieving the purpose of improving the efficiency of coal seam drainage. Compared with the gas drainage of the existing conventional scheme, this method has a significantly larger anti-r...

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Abstract

The invention relates to a coal seam gas extraction method, in particular to a coal seam gas extraction method based on the controllable impact wave technology. In order to solve the technical problems that in existing coal seam gas extraction, the cost is high, the anti-reflection effect is poor, and safety control is lacked, the invention provides the coal seam gas extraction method based on thecontrollable impact wave technology. The method comprises the following steps of 1, exploiting a roadway; 2, drilling anti-reflection drill holes, wherein 2.1, a plurality of anti-reflection drill holes are drilled in the coal mining side perpendicular to a return air cross heading and/or track cross heading; 3, installing controllable impact wave generating equipment; 4, performing impact wave anti-reflection operation. On the basis of the controllable impact wave technology, coal seam gas extraction is performed, the anti-reflection effect is good, the number of drill holes in a fully mechanized coal mining face is greatly reduced, the extraction time is shortened, the cost is effectively lowered, the extraction efficiency is improved, safety control is good, and the wide application prospect is achieved.

Description

technical field [0001] The invention relates to a coal seam gas extraction method, in particular to a coal seam gas extraction method based on controllable shock wave technology. Background technique [0002] At present, in the underground gas drainage of coal mines, the conventional main hole layout method is the "three-flower eye" structure, such as figure 1 As shown, the conventional borehole 01 drilled with this hole layout method has a hole spacing of 1.5-2m and a hole depth of 100-150m. Conventional drill holes are generally required to be arranged in the track trough and return air trough of the fully mechanized mining face. There are 800 to 1,000 holes, and the number of holes is too many, resulting in high cost and low gas drainage efficiency. [0003] In order to improve drainage efficiency and reduce the number of boreholes, coal seam anti-permeability technology has been gradually applied to underground gas drainage. At present, the coal seam anti-permeability ...

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Application Information

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IPC IPC(8): E21F7/00E21B28/00
CPCE21B28/00E21F7/00
Inventor 张永民汤俊萍王平赵有志姚伟博刘美娟
Owner 西安闪光能源科技有限公司
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