Method and system for gas pumping of high-gas coal mines

A coal mine gas and gas technology, applied in the field of gas drainage methods and drainage systems in high-gas coal mines, can solve the problems of low gas drainage efficiency, unstable gas drainage for a long time, safety hazards, etc., and achieve gas drainage efficiency High, increased safety, low operating costs

Inactive Publication Date: 2012-12-19
YUWU COAL CO LTD OF SHANXI LUAN GRP +1
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Problems solved by technology

[0004] The invention provides a gas drainage method and a gas extraction system in a high-gas coal mine, so as to solve the safety hazards caused by the gas drainage in the caving zone of the existing high

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  • Method and system for gas pumping of high-gas coal mines
  • Method and system for gas pumping of high-gas coal mines

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Embodiment Construction

[0026] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0027] Such as figure 2 As shown, the gas drainage method in a high-gas coal mine according to an embodiment of the present invention includes:

[0028] The wellhead of the horizontal well (ie the wellhead of the horizontal well) is set on the ground;

[0029] Rebuild the ramp to form a ramp segment;

[0030] Then arrange the horizontal section of the horizontal well in the fracture zone, make the horizontal section and the deflection section communicate with the wellhead of the horizontal well, and set the surface wellhead drainage device 21 at the wellhead of the horizontal well; if the horizontal well is located in the caving zone, the steel pipe is very If it is located in a curved subsidence zone, the efficiency of gas ex...

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Abstract

The invention provides a method and a system for gas pumping of high-gas coal mines. The method for gas pumping of high-gas coal mines includes: setting a wellhead of a horizontal well on the ground; setting the horizontal well communicated with the wellhead of the horizontal well in a fissure zone; and setting a vacuum pump on the ground and enabling the vacuum pump to extend into the wellhead of the horizontal well to pump the horizontal well. The system for gas pumping of high-gas coal mines comprises the horizontal well and the pump, wherein the horizontal well is arranged in the fissure zone and communicated with the ground, and the pump is positioned on the ground and communicated with the horizontal pump. Horizontal well drilling and coal mining theories are organically combined to transplant underground works to the ground for implementation, so that risks of coal mine underground construction are reduced.

Description

technical field [0001] The invention relates to the field of coal mining, in particular to gas extraction in high-gas coal mines, that is, a gas drainage method and a gas extraction system in high-gas coal mines. Background technique [0002] According to the mining theory, with the mining of coal, the overlying strata of the mining face will form caving zones, fissure zones and curved subsidence zones from bottom to top, see figure 1 shown. Caving zone 6: Temporarily supported by supports in the stope, and has collapsed in the goaf, arranged regularly or irregularly, and the height is generally 3 to 4 times the mining height; Fissure zone 5: Although it has been broken into blocks, it is still Neatly arranged, about 15 times the mining height, the cracks are well developed, and it is an important area to prevent water seepage accidents. Curved subsidence zone 4: The rock formation is less damaged, resulting in the formation of subsidence basins on the surface. The strong...

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Application Information

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IPC IPC(8): E21F7/00
Inventor 吴有增胡鹏张和茂戴先根
Owner YUWU COAL CO LTD OF SHANXI LUAN GRP
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