Ground area stripe coal mine gas outburst elimination technique

A technology for coal mine gas and ground area, which is applied in gas discharge, mining equipment, mining fluid and other directions, can solve the problems of long extraction cycle, etc., and achieve the effects of increasing coal mine production, reducing costs and reducing drilling costs

Inactive Publication Date: 2018-10-12
HENAN INST OF ENG
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  • Abstract
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Problems solved by technology

[0003] The present invention proposes a strip coal mine gas outburst elimination process in the ground area, which solves the problem of long drainage period and

Method used

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  • Ground area stripe coal mine gas outburst elimination technique
  • Ground area stripe coal mine gas outburst elimination technique
  • Ground area stripe coal mine gas outburst elimination technique

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[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0037] A strip coal mine gas outburst elimination process in a ground area, including the following steps:

[0038] a. According to the reservoir characteristics and geological characteristics, the branch layout is optimized;

[0039] Most of Henan is a single coal seam, and only Pingdingshan is developed for multiple coal seams, but the seam spacing is relatively large, and most of them do not have the conditions for mining protective layer...

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Abstract

The invention provides a ground area stripe coal mine gas outburst elimination technique. The ground area stripe coal mine gas outburst elimination technique comprises the following steps that a branch arrangement mode is optimized; a well location of a vertical well is optimized; a deflection point is optimized; a branch parameter is optimized; a reservoir modification technology is optimized; well drilling and deflecting are carried out; drilling of a main branch section is completed, and a coal rock core is observed; drilling of branches is completed; main branch hydraulic jetting fracturing is completed; and drainage and mining is started according to a drainage and mining design. The ground area stripe coal mine gas outburst elimination technique has the beneficial effects that the development cost of ground coal bed gas can be reduced, a gas extraction period can be shortened, the aim that coal seam gas-bearing capacity is quickly reduced is realized, and a great promoting function of improving coal mine production and accelerating rapid development of the coal industry is achieved.

Description

technical field [0001] The invention relates to a coal mine gas outburst elimination technology, in particular to a coal mine gas outburst elimination technology in strips on the ground. Background technique [0002] Coal plays an important role in my country's national economic construction and energy demand. With the rapid development of the country's economy, the demand for coal continues to increase, the mining intensity, mining depth, and ground stress continue to increase, and the absolute gas emission volume continues to increase, making it more difficult to solve gas exceeding the limit by relying solely on ventilation. The chances of dynamic disaster phenomena and the possibility of coal and gas outbursts have increased significantly. Therefore, it is necessary to take some measures to reduce the gas content in the coal seam and reduce the occurrence of coal and gas outburst and coal-rock composite dynamic disaster accidents. The methods to reduce the gas content ...

Claims

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Application Information

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IPC IPC(8): E21F7/00E21B43/30
CPCE21F7/00E21B43/305
Inventor 张文勇田坤云郭启文张瑞林徐星孙光中郑吉玉张青松张亚莉
Owner HENAN INST OF ENG
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