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Full-wind-pressure gas emission method adopting advanced boreholes for coal face

A technology of coal mining face and advanced drilling, which is applied in gas discharge, safety devices, mining equipment and other directions, can solve the problems of wasting time and increasing production and operation costs of coal mines, and achieves improved comprehensive benefits, shortened discharge time, and reduced air volume. Effect

Inactive Publication Date: 2019-06-21
HENAN POLYTECHNIC UNIV
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  • Description
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Problems solved by technology

This method only reduces the gas concentration in the return air flow, but the air flow velocity and gas concentration of the working face have not changed, and adding a roadway is a waste of time and greatly increases the production and operation costs of the coal mine

Method used

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  • Full-wind-pressure gas emission method adopting advanced boreholes for coal face
  • Full-wind-pressure gas emission method adopting advanced boreholes for coal face
  • Full-wind-pressure gas emission method adopting advanced boreholes for coal face

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Embodiment Construction

[0030]In order to make the purpose, technical solutions and beneficial effects of the present invention more clear, the following will further describe the implementation of the present invention in detail in conjunction with the accompanying drawings.

[0031] like figure 1 As shown, the present invention provides a method for full wind pressure gas discharge of advanced drilling in coal mining face, including the following construction steps:

[0032] Step 1: Set up return air uphill 1, transport uphill 2 and track uphill 3 in the floor rock layer in the middle or one side of the design section. The distance between return air uphill 1 and transport uphill 2 is 20m, and the transportation uphill The distance between 2 and the mountain 3 on the track is 20m.

[0033] Step 2: Set up a section transportation lane 4 at the lower boundary of the design section, and set up a section-specific gas discharge lane 5 and a section return air lane 6 at the upper boundary of the design ...

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Abstract

The invention relates to a full-wind-pressure gas emission method adopting advanced boreholes for a coal face. The method adopts the advanced boreholes connected to an upper wind roadway and a lower wind roadway of a working face for gas emission and specifically comprises the following steps that an original common gas tail roadway is utilized as a special gas emission roadway for a zone, for original advanced gas drainage boreholes which are not through in a coal body, a haulage roadway for the zone is directly communicated with the special gas emission roadway for the zone, so that the windflow passes through the through boreholes, gas around the boreholes is directly brought to the special gas emission roadway through the entrainment effect, drainage equipment emission is changed intospecial roadway emission, and after the implementation, a coal wall of the working face does not need to carry out shallow hole gas emission work. According to the method, the emission quantity of the gas emission boreholes is selected, so that the gas concentration in the special gas emission roadway can be kept within a reasonable range, and the emission efficiency and the safety degree can begreatly improved; and the gas in the coal wall is directly emitted through a full-wind-pressure wind path, so that the gas emission quantity of the working face is decreased.

Description

technical field [0001] The invention belongs to the technical field of gas drainage in coal mining, in particular to a method for discharging gas under full wind pressure through advanced drilling in a coal mining face. Background technique [0002] In the process of mining outburst coal seams in coal mines, effective measures to prevent coal and gas outburst must be taken; Article 216 of the "Coal Mine Safety Regulations Local Comprehensive Outburst Prevention Measures" stipulates: "Advance drilling and pre-extraction can be selected for the coal mining face. gas, advance drilling to discharge gas, water injection to wet the coal body, loose blasting or other outburst prevention measures that have been proved effective by tests.” These intermediate advance drilling discharge measures are currently widely used in outburst mines in my country. [0003] There are two main methods to prevent gas outburst in the existing coal mining face: one is to adopt the method of drilling ga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F7/00
Inventor 李振峰王春王浩神文龙夏大平李文彩
Owner HENAN POLYTECHNIC UNIV
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