Method for extracting gas in adjacent sections through non-coal-pillar gob-side entry retaining

A technology with empty entry and no coal pillars, which is applied in gas discharge, mining equipment, earthwork drilling and mining, etc., can solve problems such as the inability to effectively reduce the gas overrun in the tunneling face, achieve considerable economic benefits, reduce construction difficulty, and save energy. The effect of construction costs

Pending Publication Date: 2021-08-06
华能煤炭技术研究有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for gas drainage in adjacent sections of gob-side entry without coal pillars, so as to solve the technical problem that the existing coal pillar-free mining methods cannot effectively reduce the gas overrun in the tunneling face

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  • Method for extracting gas in adjacent sections through non-coal-pillar gob-side entry retaining

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Embodiment Construction

[0022] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0023] figure 1 The construction schematic diagram of the method for gas drainage in adjacent sections provided by this embodiment is provided in gob-side entry without coal pillars. Such as figure 1 As shown, this embodiment provides a method for gas extraction in adjacent sections of gob-side entry without coal pillars, including the following steps: S200: During the recovery process of the mining face, the transportation roadway 200 of the first mining face adopts gob-side retention The roadway technology is reserved, and the section return airway 400 is arranged at the edge of the mi...

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Abstract

The invention provides a method for extracting gas in adjacent sections through non-coal-pillar gob-side entry retaining, relates to the technical field of gas extraction, and aims to solve the problem that the existing coal-pillar-free mining method cannot effectively reduce gas overrun of a driving face. The method for extracting the gas in the adjacent sections through the non-coal-pillar gob-side entry retaining comprises the following steps that first bedding drill holes are formed in the gob-side entry retaining of a stope face and a first mining face transportation roadway in the inclined direction of a coal seam, and the tail ends of the first bedding drill holes are located at the position of a connecting face track roadway of the adjacent sections; and in the tunneling process of the connecting face track roadway tunneling working faces of the adjacent sections, second bedding drill holes are formed in the connecting face track roadway tunneling working faces in the coal seam trend, so that the second bedding drill holes and the first bedding drill holes form a latticed three-dimensional intersection state, and the second bedding drill holes communicate with the first bedding drill holes at least through cracks. By means of the method for extracting the gas in the adjacent sections through the non-coal-pillar gob-side entry retaining, gas overrun of the driving face can be effectively avoided.

Description

technical field [0001] The invention relates to the technical field of gas drainage, in particular to a method for gas drainage in adjacent sections of gob-side entry without coal pillars. Background technique [0002] Pillarless mining is a mining technology that does not leave coal pillars in the roadway protection process and maintains the roadway in other ways. Its advantages are high recovery rate, can reduce rock burst, low driving rate, and low roadway maintenance costs , so it has been widely used. However, the existing coal pillar-free mining methods cannot effectively reduce the gas overrun problem in the tunneling face. Contents of the invention [0003] The purpose of the present invention is to provide a method for gas drainage in adjacent sections of gob-side retaining without coal pillars, so as to solve the technical problem that existing coal pillar-free mining methods cannot effectively reduce gas overruns in tunneling working faces. [0004] The method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F7/00
CPCE21F7/00
Inventor 高健勋马新根高利晶郭孝琛张倍宁孙福龙王冰山王维杨阳乔力帆
Owner 华能煤炭技术研究有限公司
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