Arrangement method of high gas coal seam extraction working face roadway

A technology for mining face and roadway layout, which is applied in the direction of gas discharge, tunnels, safety devices, etc., which can solve the problems of difficult maintenance of gas discharge roadway, waste of resources, and large loss of coal pillars in sections, so as to improve the recovery rate of coal resources , increase the mining ratio, and reduce the loss of coal pillars in the section

Inactive Publication Date: 2012-07-18
CHINA UNIV OF MINING & TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this method is that two 25-35m coal pillars are reserved during the replacement, resulting in a large loss of coal pillars in the section, resulting in a waste of resources
At the same time, when the working face of the next section is recovered, the gas discharge roadway behind the working face enters the state of an island coal pillar roadway, and is in the area where the lateral support pressure stress of the goaf in the two sections increases, which makes the maintenance of the gas discharge roadway difficult

Method used

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  • Arrangement method of high gas coal seam extraction working face roadway
  • Arrangement method of high gas coal seam extraction working face roadway
  • Arrangement method of high gas coal seam extraction working face roadway

Examples

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Embodiment 1

[0011] Embodiment 1, as figure 1 As shown, the first layout method of the roadway in the mining face of high gas coal seam:

[0012] 1. Arrange the initial working face, adopt double roadway layout and excavation, that is, excavate the return air level roadway 4 of the previous working face and the gas discharge roadway 5 of the previous working face at the same time, and the distance between the double roadways is 25~35m;

[0013] 2. Carry out the mining of the initial working face, and maintain the gas discharge lane 5 of the previous working face during the mining process;

[0014] 3. After the mining of the previous working face is completed and the overlying stratum is stable, the coal pillar 8 of the previous working face between the main road 3 along the goaf 1 edge of the previous working face and the gas discharge roadway 5 of the previous working face is parallel Open a gas discharge lane 9 in the next working face, the distance between the gas discharge lane 9 in t...

Embodiment 2

[0016] Embodiment 2, as figure 2 As shown, the layout method of the roadway in the mining face of high-gas coal seam II:

[0017] 1. Arrange the initial working face, adopt double roadway layout and excavation, that is, excavate the return air level roadway 4 of the previous working face and the gas discharge roadway 5 of the previous working face at the same time, and the distance between the two roadways is 25~35m;

[0018] 2. Carry out the mining of the initial working face, and maintain the gas discharge lane 5 of the previous working face during the mining process;

[0019] 3. After the mining of the previous working face is completed and the overlying rock stratum is stable, a return air roadway 6 of the next working face is parallelly opened in the coal seam below the gas discharge roadway 5 of the previous working face from the roadway 3, and the next working face is returned to The width of the coal pillar 11 of the next working face between the air level roadway 6 ...

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Abstract

The invention discloses an arrangement method of a high gas coal seam extraction working face roadway, which comprises roadway arrangement of an initial working face and extraction of the working face. After the completion of the extraction of the last working face and the stabilization of an upper overlying rock layer, the next working face gas exhaustion lane is arranged in parallel along a last working face coal column between a last working face extraction region edge and the last working face gas exhaustion lane from a large lane, or the next working face air returning leveling lane is arranged in parallel along the coal seam below the last working face gas exhaustion lane from the large lane, the next working face gas exhaustion lane is in auxiliary hole cut-off communicated with the next working face, or the next working face air returning leveling lane is in hole cut-off communicated with the next working face; and the processes are repeated until the roadway arrangement of the working face of the exploration region and the extraction of the working face is completed. The problems that the loss of the coal columns in the region sections is large and the next working face gas exhaustion lane is difficult to maintain can be solved, so that the next working face gas exhaustion lane of the outer circle can be normally used under the influence of the secondary extraction, thereby improving the extraction ratio of the coal carbon resources and reducing the roadway tunneling ratio.

Description

technical field [0001] The invention relates to a method for arranging a roadway in a mining face, in particular to a method for arranging a roadway in a mining face in a high-gas coal seam. Background technique [0002] For high gas mines (relative gas emission from mines is greater than 10m 3 / t or the absolute gas emission of the mine is greater than 40m 3 / min), the mining roadway of the working face mostly adopts double-lane or multi-lane layout and excavation. Considering issues such as ventilation, drainage, gas discharge and excavation connection, the Lu'an mining area adopts the layout method of "two incisions and two incisions (double incisions)". The air inlet roadway, a gas discharge roadway and an auxiliary cutout form the outer ring roadway, and the inner ring roadway constitutes a double-circuit working face layout. In addition, the gas discharge roadway is reserved during the mining process of the working face in this section. When the working face in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F7/00E21D9/14
Inventor 柏建彪王襄禹闫帅李文峰徐营霍林军
Owner CHINA UNIV OF MINING & TECH
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