Gas control method for return airflow corner of coalmine coal working face

A coal mining face and gas technology, applied in the direction of gas discharge, mining equipment, earthwork drilling, etc., can solve the problem of gas overrun in the return air corner, reduce the gas concentration, solve the problem of gas control, and improve the safe working environment Effect

Active Publication Date: 2012-04-11
CHINA SHENHUA ENERGY CO LTD
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Problems solved by technology

[0010] In view of this, the purpose of the present invention is to provide a gas control method for the return air corner of the coal mining face in a coal mine, which can effectively solve the problem of excessive gas in the return air corner of the coal mining face in high-yield and high-efficiency mines

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  • Gas control method for return airflow corner of coalmine coal working face
  • Gas control method for return airflow corner of coalmine coal working face
  • Gas control method for return airflow corner of coalmine coal working face

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Embodiment Construction

[0041] Referring to the accompanying drawings, the method for controlling the gas in the air return corner of the coal mining face of the present invention will be described in detail with reference to specific embodiments.

[0042] figure 1 and figure 2 The working process and roadway structure of a preferred embodiment of the present invention are shown.

[0043] in, figure 1 The working process of a preferred embodiment of the present invention is shown, which specifically includes the following steps:

[0044] Step 101, the working face is pushed forward to the entrance of a connecting roadway.

[0045] Such as figure 2 As shown, the end face on the left side of goaf 1 is the working face, and there are first air return roadway 3 and second air return roadway 4 on both sides of coal pillar 2, and there is a connecting first return airway between every two coal pillars 2 The connection lanes 10, 11, 12, 13, 14, 15 of the wind lane 3 and the second air return lane 4. ...

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Abstract

The invention discloses a gas control method for a return airflow corner of a coalmine coal working face; the gas control method comprises the steps of laying a main drawing-out pipe in a return air roadway in advance and laying a drawing-out branch pipe with a butterfly valve, which corresponds to a connection roadway; the control process comprises the following steps of: A. closing the connection roadway and the return air roadway when the working face is pushed forward to an entrance of the connection roadway; B. laying a wind tunnel from a closing part of the return air roadway to a closing part of the connection roadway in a penetrating manner; and drawing out gas of the return airflow corner by using the wind tunnel; and C. opening a butterfly valve on a drawing-out branch pipe of a connection roadway previous to the connection roadway in the step A for drawing out gas. According to the gas control method, the gas concentration of the return airflow corner of the working face can be effectively reduced, the difficult problem of the gas control on the return airflow corner of the high-yield and high-efficiency working face is effectively solved, and the safety operating environment of the working face is greatly improved.

Description

technical field [0001] The invention relates to the technical field of coal mining in coal mines, in particular to a method for controlling gas at the return air corner of a coal mining working face. Background technique [0002] At present, the gas control measures for the return air corner of the coal mining face mainly include the following: [0003] 1) Set up wind curtains to guide wind flow. When the gas concentration in the upper corner of the coal mining working face is not too high, wind curtains or wooden boards are installed near the upper corner of the working face to force a part of the air flow to pass through the upper corner to discharge the accumulated gas. [0004] 2) Fan exclusion method. The fan exhaust method can be divided into hydraulic fans, electric local fans and ejectors according to the different power sources, but the principle and arrangement method are the same. The accumulated gas is flushed and taken away. [0005] 3) Increase the air volu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F7/00
Inventor 杨俊哲贺安民陈殿赋安世岗薛夏民黄步青秦波涛张雷林周成军
Owner CHINA SHENHUA ENERGY CO LTD
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