Rock burst prevention and control method of three-dimensional coal pillar coal compressing area
A technology of rock burst and coal pillar, which is applied in drilling equipment and methods, ground mining, earth-moving drilling, etc., can solve the problems of high rock burst risk, prevention and control effect, and high-energy rock burst danger, etc. To achieve the effect of reducing the risk of impact and achieving control
Inactive Publication Date: 2018-11-06
HUAIHAI INST OF TECH
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Problems solved by technology
In the mining stage of the working face, due to various historical reasons such as mining technology limitations, mining environmental impacts, and mining needs, leftover coal pillars of various sizes and areas will be formed. Due to the existence of leftover coal pillars, the stress on the coal pillars and their surrounding areas Abnormal appearance, large degree of energy accumulation, high risk of rock burst
Especially when there are residual three-dimensional coal pillars in the upper coal seam of the working face, the mining of the lower working face will accumulate a large impact energy due to the superimposed coupling effect of the upper three-dimensional residual coal.
At present, most of the rock burst prevention and control technologies in the coal pillar area are on the same level coal pillars, but the high stress area and energy accumulation degree generated by the three-dimensional coal pillars are much larger than the same level coal pillars, and the stress environment is extremely complex. The anti-scour technology of pillars is difficult to fundamentally prevent and control the rockburst of three-dimensional coal pillars. Therefore, it is necessary to invent a prevention and control method for rockburst in the three-dimensional coal pillar coal pressing area to ensure the safety of the working face. mining
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Embodiment 1
[0028] Such as figure 1 As shown, this embodiment provides a method for preventing and controlling rock burst in a three-dimensional coal pillar coal pressing area, including the following steps:
[0029] Step 1: Determine the coal pressure area of the upper three-dimensional residual coal pillar in the mining face of the coal seam and the influence range of the coal pillar stress, and delineate the impact risk area 1 affected by the three-dimensional coal pillar;
[0030] Step 2: 300m away from the impact dangerous area in front of the coal wall 2 of the working face, within the delineated impact dangerous area 1, a plurality of blasting drilling groups 4 are arranged at intervals on the coal wall 2 of the working face for the roadway 3, each The blasting drill hole group 4 includes a plurality of blasting drill holes 5;
[0031] The third step: fill the depth of the blasting borehole 5 with explosives, seal the remaining length of the blasting borehole 5 with gun mud, and...
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The invention discloses a rock burst prevention and control method of a three-dimensional coal pillar coal compressing area, and relates to the technical filed of coal mining. A plurality of blastingdrilling groups are formed in a coal wall of a working face, and the high energy level impact energy formed by three-dimensional coal pillars can be blasted by high-strength to form a plurality of low-energy block regions, and the accumulated elastic energy is released to a large extent. The energy block area blocks and eliminates high stress and high energy, reduces the impact risk of a three-dimensional coal pillar area, and realizes the control of high energy level impact energy.
Description
technical field [0001] The invention relates to the technical field of coal mining, in particular to a method for preventing and controlling rock burst in a three-dimensional coal pillar coal pressing area. Background technique [0002] Under the background of continuous mining of coal resources, coal in shallow and easy-to-mine areas is close to depletion. At present, coal mining has developed to deep and difficult-to-mine areas. With the increase of mining depth and mining intensity, the resulting The problem of rock burst is extremely serious. In the mining stage of the working face, due to various historical reasons such as mining technology limitations, mining environmental impacts, and mining needs, leftover coal pillars of various sizes and areas will be formed. Due to the existence of leftover coal pillars, the stress on the coal pillars and their surrounding areas Abnormal appearance, large degree of energy accumulation, and high risk of rock burst. Especially whe...
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IPC IPC(8): E21C41/18E21B7/00
CPCE21C41/18E21B7/007
Inventor 魏辉潘立友宗钟凌田安国张三柱严福生赵晓晴李晓星
Owner HUAIHAI INST OF TECH
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