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Method for releasing pressure and removing danger of rock burst

A technology of rock burst and danger relief, applied in surface mining, earthwork drilling, underground mining, etc., can solve the problems of weakening coal seam impact tendency, singleness, and inability to achieve, to ensure safe production, economic and social benefits Huge, good effect

Inactive Publication Date: 2012-09-19
HENAN DAYOU ENERGY
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Problems solved by technology

[0003] For various rock burst mines with different geological structures and stress concentration levels on the mining face, the existing measures for pressure relief of rock burst are too simple in practical application and cannot effectively prevent the occurrence of rock burst disasters, thus failing to achieve the goal of weakening the coal seam. The expected effect of impact tendency cannot well solve the unsafe hidden dangers caused by rock burst. Therefore, improvement and innovation in pressure relief and danger relief of rock burst are technical problems that must be solved

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  • Method for releasing pressure and removing danger of rock burst
  • Method for releasing pressure and removing danger of rock burst
  • Method for releasing pressure and removing danger of rock burst

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Embodiment Construction

[0037] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings and actual conditions.

[0038] Depend on figure 1 As shown, the present invention uses a three-level system to relieve pressure and relieve rock burst, and the three-level system is a first-level coal seam pressure relief, a second-level surrounding rock pressure relief, and a third-level mining release layer pressure relief;

[0039] One of the first-level coal seam pressure relief methods is to use the coal seam pressure relief blasting, pressure relief drilling, and coal seam water injection, respectively:

[0040] (1) Deep-hole blasting in this coal seam: During coal mining and excavation, blasting blastholes (also called blasting holes) are arranged in the head, the upper side of the transportation lane, the return air lane, and the lower side of the transportation lane. The distance between the blastholes is 5m and the hole d...

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Abstract

The invention relates to a method for releasing pressure and removing danger of rock burst. The effects of releasing pressure and removing danger of rock burst and ensuring the safety of a coal mine can be effectively realized. The method comprises the following steps of: releasing pressure and bursting a coal bed; because of higher inner stress in the coal bed, drilling a roadway wall to form a free space, so that the stress is re-distributed; drilling to enable pressure and water solution to enter a coal body and increase water content; bursting a top plate of the coal bed; bursting a bottom plate of the coal bed; through high pressure, filling fracturing fluid into cracks and slots which are formed in the coal body before fracturing and after fracturing; expanding, extending and dredging the cracks; increasing the slots of the coal bed; changing the magnitude and the direction of the stress on the coal body; transmitting the stress to the deep part of a coal-rock mass; and selecting the safe coal bed or coal body to exploit, wherein after a goaf area and a natural caving arch are formed, an unloading effect is achieved, the rock burst and roof collapse are prevented or relieved. The method is stable and reliable, good in pressure-releasing and danger-removing effects, and high in economic and social benefits, prevention and control on the rock burst are realized, and the safe production of the coal mine is effectively protected.

Description

technical field [0001] The invention relates to the mining industry, in particular to a rock burst pressure relief method comprehensively used in a pressure relief system in a strong rock burst dangerous area. Background technique [0002] When coal mining reaches a certain depth, due to the joint action of ground stress, mining stress and structural stress, most mines are threatened by rock burst to varying degrees, coupled with the impact tendency of the coal seam itself, mining technical conditions and geological factors, Rockburst will appear more and more serious, and with the increase of mining depth, rockburst will appear more and more frequently. The impact intensity and degree of damage are getting bigger and bigger, especially when the mining depth reaches 500m below the surface, it occurs frequently and strongly, which seriously threatens safe production. [0003] For various rock burst mines with different geological structures and stress concentration levels on...

Claims

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Application Information

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IPC IPC(8): E21C41/16
Inventor 刘军韩荣军姜红兵吴凯马建军李俊营王世超丁传宏张毅
Owner HENAN DAYOU ENERGY
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