A leak-proof wind gas drainage method by drilling along the bedding

A technology of gas extraction and layer drilling, which is applied in gas discharge, earthwork drilling, mining equipment, etc., can solve problems such as high cost, failure of sealing holes, air leakage, etc., so as to improve gas extraction concentration and save labor costs. , The effect of reducing air leakage

Active Publication Date: 2019-06-11
CHINA UNIV OF MINING & TECH
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Problems solved by technology

The existing related technologies are all focused on sealing the air leakage channel, but the development of the air leakage channel is relatively complicated on the one hand, and on the other hand, there may be changes with the extraction time
Therefore, in the actual extraction process, although the hole sealing process of sealing the air leakage channel has been carried out, there is still a certain degree of air leakage. Failure phenomenon, and high cost

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  • A leak-proof wind gas drainage method by drilling along the bedding

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Embodiment Construction

[0011] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0012] see figure 1 , the specific embodiment of a kind of bedding-drilling anti-leakage gas drainage method of the present invention comprises two stages, first establishes the main gas drainage system, and establishes the auxiliary gas drainage system on the basis of the main gas drainage system.

[0013] When establishing the main gas dra...

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Abstract

A bedding borehole-based gas extraction method capable of avoiding air leakage, comprising two stages, i.e., building a main gas extraction system and building an auxiliary gas extraction system: firstly, a main gas extraction pipeline (9) is laid inside a roadway (11), bedding extraction boreholes are constructed, the bedding extraction boreholes are sealed, and borehole-based gas extraction pipes are connected to the main gas extraction pipeline to perform gas extraction; and after all the boreholes in the roadway are sealed for extraction, an airtight wall is constructed at an opening of the roadway where the boreholes are constructed, an auxiliary gas extraction pipeline (10) is laid, and the auxiliary gas extraction pipeline (10) is connected to an auxiliary gas pump extraction pipeline to perform auxiliary extraction. The method can effectively resolve the problem of serious air leakage in a bedding borehole-based extraction process, has a simple process, is easy to implement, and can reduce labor costs.

Description

technical field [0001] The invention relates to a method for gas drainage in areas with serious air leakage during the bedding drilling drainage process, and belongs to the field of coal mine gas bedding drilling drainage. Background technique [0002] When using boreholes for coal seam gas extraction, the gas concentration (volume percentage) extracted from well-sealed and airtight boreholes should be close to 100% in theory, but in the actual extraction process, due to the leakage of a large amount of air, As a result, the concentration of gas drainage in most mines in my country has been below 30% for a long time. [0003] Two conditions must be met for the existence of air leakage in the gas drainage process. One is that there must be an air leakage channel, and the other is that there must be a pressure difference between the two ends of the air leakage channel. The existing related technologies all focus on plugging the air leakage channel, but on the one hand, the dev...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F7/00E21B33/13
CPCE21B33/13E21F7/00
Inventor 林柏泉刘辉辉牟俊惠杨威刘统
Owner CHINA UNIV OF MINING & TECH
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