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Method of retaining roadway along gob to avoid influence of dynamic pressure in coal seam mining

A technology for emptying roadway and coal seam, which is applied in ground mining, mining equipment, earthwork drilling and other directions, can solve the problems of increasing difficulty in safety management of shed repairs, a large amount of material and labor costs, and repeated investment of I-beams. Cost and engineering volume, reducing the cost of roadway retention, and the effect of roadway stabilization

Inactive Publication Date: 2016-09-28
HENAN POLYTECHNIC UNIV
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Problems solved by technology

[0006] At present, many coal mines in China have unanimously carried out targeted repairs on the sections where the local deformation of the roadway is relatively serious, but the roadway is always in a passive repair state, and the repaired roadway is still deformed, resulting in the repeated investment of I-beams. A large amount of material and labor costs, and the difficulty of safety management for repairing the shed also increases

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  • Method of retaining roadway along gob to avoid influence of dynamic pressure in coal seam mining
  • Method of retaining roadway along gob to avoid influence of dynamic pressure in coal seam mining

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Embodiment Construction

[0030] Such as figure 1 and figure 2 As shown, the coal seam mining of the present invention avoids the gob-side entry method of dynamic pressure influence, comprises the following steps:

[0031] 1) Divide the coal seam into the mining area, and divide the mining area into several sections, arrange the preparation roadway 1 serving each section in the mining area, and the leftmost side behind the preparation roadway 1 is the first section 2, The right side of the first section 2 is the second section 3, the right side of the second section 3 is the third section 4, and so on, and the rightmost side of the preparation roadway 1 is the Nth section;

[0032] 2) On the left side of the first section 2, there is a return air level roadway 5 in the first section that is perpendicular to and connected with the preparation roadway 1. Between the first section 2 and the second section 3, there is a vertical roadway 5 perpendicular to the preparation roadway 1. The first section of ...

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Abstract

The gob-side retaining method for avoiding the influence of dynamic pressure in coal seam mining includes the following steps: divide the coal seam mining area, and divide the mining area into several sections; The front end of the roadway is opened and cut, and the mining operation is carried out on the front of the cut to form the working face, and the goaf is formed behind the working face after mining; in the goaf, the position L meters behind the working face is started. Re-repair the first section of the transport level roadway, within the range less than L meters is the temporary support section of the gob-side entry retention. This section adopts a steel frame temporary support structure and is supplemented by a single column to strengthen the support. The invention reduces the cost and difficulty of retaining the roadway, and the work of retaining the roadway and the working face are separated by a certain distance, and the construction does not affect each other. The roadway is more stable and easy to maintain.

Description

technical field [0001] The invention relates to the technical field of coal mine safety production, in particular to a gob-side entry retaining method for avoiding the influence of dynamic pressure in coal seam mining. Background technique [0002] Gobside entry retention technology is a relatively mature technology in China's coal mining. Its basic principle is to maintain a roadway at both ends of the coal mining face during the mining process without abandoning it, and artificially construct isolation between the roadway and the goaf Generally, the isolation belt is constructed at the rear of the working face. There are mainly two methods of solid material stacking and paste filling, and the left roadway serves the adjacent section, so the coal pillar-free roadway between the sections is realized. It improves the recovery rate of coal resources, reduces the mine excavation rate, relieves the tension of excavation replacement, and can realize the Y-shaped ventilation of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/18E21D9/00E21D11/00
CPCE21C41/18E21D11/00
Inventor 袁瑞甫李春杰乔卿付杨明刘银先
Owner HENAN POLYTECHNIC UNIV
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