Non-chain-pillar exploitation method

A mining method and technology without coal pillars, applied in ground mining, mining equipment, earthwork drilling and other directions, can solve the problems of coal pillar ignition, safety production threat, waste of coal resources, etc., to achieve improved recovery rate, high strength, reduced The effect of support difficulty

Inactive Publication Date: 2014-07-30
CHINA UNIV OF MINING & TECH
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  • Summary
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AI Technical Summary

Problems solved by technology

Although the coal pillars left between the working face sections play a certain role in preventing air leakage and spontaneous combustion in the short term, they cause a waste of non-renewable coal resources (loss of 2% to 3%). The side of the goaf is crushed or even crushed, which can easily cause the coal pillars in the goaf to spontaneously ignite, posing a threat to safe production

Method used

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Embodiment Construction

[0015] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0016] The coal pillar-free mining method of the present invention: After the mining of the coal mining face in the upper section is completed, the narrow coal pillar 2 is reserved along the goaf 3 to excavate the lower section track roadway 1, and the width of the narrow coal pillar 2 is not more than 3m. After the excavation of the track roadway 1 in the lower section is completed, the working face 5 in the lower section advances and constructs the filling wall 4 along the edge of the goaf 3 to replace the left narrow coal pillar 2, and builds the filling wall along the edge of the goaf to replace the left coal pillar. The working face in the lower section ahead of the narrow coal pillar is greater than 20m. The filling wall 4 is constructed section by section in advance with the advancement of the working face until the replacement of the narrow coal pi...

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Abstract

The invention discloses a non-chain-pillar exploitation method. The method comprises the following steps: tunneling a lower zone track lane along a reserved narrow chain pillar in a goaf after recovery of an upper zone working surface is ended; replacing the reserved narrow chain pillar with a filling body constructed along the edge of the goaf ahead a lower zone working surface after tunneling of a lower zone mining roadway is ended; gradually constructing the filling body in sections along with extending of the working surface until recovery of the lower zone working surface is finished; and sequentially circulating until coal mining of an overall area is finished. The support difficulty of gob-side entry driving is lowered, deformation of gob-side entry driving is effectively controlled, the goaf is isolated, and the recovery rate of coal resources is improved. The method is simple, safe, reliable and environmentally friendly, and has a useful effect.

Description

technical field [0001] The invention relates to a mining method, in particular to a mining method without coal pillars which is suitable for constructing filling bodies in gob-side entry to replace narrow coal pillars in gob-side entry with good roof conditions . Background technique [0002] As an important research branch of "green mining", the coal pillar-free mining mode is an important part of exploring and realizing the idea of ​​energy conservation and emission reduction and implementing the strategy of sustainable development of human survival in the current production and construction of coal mines in my country, and it is also the focus of the national 12th Five-Year Plan One of the supported research directions. [0003] At present, the roadways in most mining areas in my country have been maintained by the method of retaining coal pillars, that is, narrow coal pillars of 3 to 5 m or wide coal pillars of 15 to 30 m are left between the working faces, the purpose o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/16E21F15/00
Inventor 马立强于斌张炜杜勋王飞
Owner CHINA UNIV OF MINING & TECH
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