Coal mine roadway rock burst prevention and control method based on controllable shock wave presplitting pressure relief
A coal mine roadway and rock burst technology, which is applied in ground mining, mining equipment, earthwork drilling and mining, etc., can solve problems such as inability to release pressure in the deep part of coal or/and rock mass, high risk of safe production, and difficulty in achieving balanced pre-cracking, etc.
Pending Publication Date: 2021-04-27
西安闪光能源科技有限公司 +1
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Problems solved by technology
[0009] The purpose of the present invention is to solve the technical problems that the existing methods for prevention and control of rock burst in coal mine roadway cannot relieve pressure on coal or / and rock mass deep, the risk of safe production is high, or it is difficult to achieve balanced pre-cracking, and to provide a controllable Prevention and control method of rock burst in coal mine roadway by shock wave pre-cracking and pressure relief
Method used
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[0047] The present invention will be further described below in conjunction with accompanying drawing.
[0048] A coal mine roadway rockburst prevention method based on controllable shock wave pre-cracking pressure relief, comprising the following steps:
[0049] 1) Carry out a mechanical analysis test on the coal or / and rock mass around the roadway 7, and drill 3-5 verification boreholes on site, use the verification boreholes to verify the test results, and then reasonably determine the coal or / or The depth interval of drilling the pre-split borehole 9 with the rock mass (that is, the distance between two adjacent pre-split boreholes 9 along the direction of the roadway 7) is 10-30m, the circumferential interval is 10-30m, and each pre-split The hole depth of the borehole 9 is 10-50m, the aperture is 113-133mm and the pre-split operation range, and the distance between adjacent operation points 10 in the hole and the number of operations of each operation point 10; image 3...
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Abstract
The invention relates to a coal mine rock burst prevention and control technology, in particular to a coal mine roadway rock burst prevention and control method based on controllable shock wave presplitting pressure relief. The invention aims to solve the technical problems that an existing coal mine roadway rock burst prevention and control method cannot relieve pressure in the deep portion of coal or / and rock mass, is high in safety production risk or difficultly realizes balanced presplitting, and provides the coal mine roadway rock burst prevention and control method based on controllable shock wave presplitting pressure relief. According to the method, in a controllable shock wave presplitting mode, presplitting areas of coal or / and rock mass on the periphery of a roadway mutually communicate in the depth direction and the circumferential direction of the roadway to form a crushing ring layer, and the crushing ring layer is surrounded by an outer complete coal or / and rock mass layer and an inner complete coal or / and rock mass layer on the two sides of the crushing ring layer, so that a hard layer-soft layer-hard layer structure with a buffering function on rock burst is formed.
Description
technical field [0001] The invention relates to coal mine rock burst prevention technology, in particular to a coal mine roadway rock burst prevention method based on controllable shock wave pre-splitting and pressure relief. Background technique [0002] Rockburst is a sudden, severe, and destructive dynamic phenomenon caused by the instantaneous release of elastic deformation energy of coal or / and rock mass around coal mine roadways and working faces, often accompanied by instantaneous displacement of coal or / and rock mass, throwing Eruptions, loud noises and air waves are one of the typical dynamic disasters in the coal mining process. Coal mine rock burst is not only harmful and affects a wide range of areas, but also is the root cause of other major coal mine accidents. When rock burst occurs, it may also induce disasters such as abnormal gas gushing, coal and gas outburst, water inrush, and gas explosion, resulting in more serious consequences. [0003] Statistical a...
Claims
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Patent Timeline
Login to View More IPC IPC(8): E21C41/16E21C41/18E21F7/00E21B43/26
CPCE21C41/16E21C41/18E21F7/00E21B43/26
Inventor 张永民汤俊萍郭晓飞王平张硕刘美娟邱爱慈
Owner 西安闪光能源科技有限公司