Method for gas resourceextractionof reversed F-shaped ground well in mining area

A mining area and ground technology, applied in gas discharge, mining equipment, earth-moving drilling, etc., can solve problems such as gas overrun, and achieve the effect of ensuring gas safety

Active Publication Date: 2019-02-12
CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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Problems solved by technology

[0002] At present, in the process of gas resource extraction, there are problems of excessive gas in the coal mining face, upper corner and return airway. At this stage, there is no method to solve the gas resource extraction of inverted F-shaped ground wells in the mining area. Such problems

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  • Method for gas resourceextractionof reversed F-shaped ground well in mining area
  • Method for gas resourceextractionof reversed F-shaped ground well in mining area
  • Method for gas resourceextractionof reversed F-shaped ground well in mining area

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Embodiment Construction

[0034] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0035] By arranging a surface well on the roof above the coal seam, the well leads two horizontal well sections (the first horizontal well section and the second horizontal well section) from different layers of the vertical well section, and the first horizontal well section is arranged in the coal seam caving zone In the middle part, the gas decompressed and desorbed in the space of the coal mining face is extracted, and the gas desorbed in the coal mining face is continuously extracted as the working face advances. The anti-extrusion or shearing capacity of the gas drainage screen, the gas in the coal mining face and adjacent layers is extracted, and the surface well is pushed through the surface well as the working face is pushed. The second horizontal well section will drain the gas resources in the goaf for a long time. Such as figur...

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Abstract

The invention relates to a method for gas resourceextraction of a reversed F-shaped ground well in a mining area, and belongs to the technical field of coal mine gas extraction. According to the method for extracting gas resourcesin a goaf, the problem that gas is transfinite on a coal face, an upper corner and a return airway is solved. The method mainly comprises the steps that (1) layer position of horizontal well section of the reversed ''F''-shaped ground well in the mining area is determined; (2) the plane position of the horizontal well section of the reversed ''F''-shaped ground well in the mining area is determined; (3) the drilling well completion technology of the reversed ''F''-shaped ground well in the mining area is carried out; and (4) gas of the reversed ''F''-shaped groundwell in the mining area is safely extracted and controlled. Therefore, the complete method for gas resourceextraction of the reversed ''F''-shaped ground well in the mining area can be formed, and the safety of gas in coal face and extraction gas resources in the goaf can be effectively ensured.

Description

technical field [0001] The invention belongs to the technical field of gas extraction in coal mines, and relates to a method for extracting gas resources from an inverted F-shaped ground shaft in a mining area. Background technique [0002] At present, in the process of gas resource extraction, there are problems of excessive gas in the coal mining face, upper corner and return airway. At this stage, there is no method to solve the gas resource extraction of inverted F-shaped ground wells in the mining area. Such problems. Contents of the invention [0003] In view of this, the object of the present invention is to provide a method for extracting gas resources from inverted F-shaped ground wells in mining areas. [0004] To achieve the above object, the present invention provides the following technical solutions: [0005] A method for extracting gas resources from an inverted F-shaped ground well in a mining area, the method comprising the following steps: [0006] S1:...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F7/00
CPCE21F7/00
Inventor 付军辉林府进李日富孙海涛江万刚刘见中孙东玲王然马正恒张玉明
Owner CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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