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Method for preventing and treating impact mine pressure through high-dipping super-high-seam mining roadway combined pressure relief

A technology for mining tunnels and extra-thick coal seams, used in special mining, mining equipment, surface mining, etc., can solve the problem of not being able to economically and effectively reduce the degree of stress concentration in the coal seam and roof and floor, restricting the safe and efficient mining of steeply inclined coal seams, and inconsistency in parameters. Reasonable and other issues, to reduce the risk of rock burst dynamic disaster, avoid rock burst dynamic disaster, and achieve good results

Inactive Publication Date: 2019-07-30
CHINA UNIV OF MINING & TECH +2
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AI Technical Summary

Problems solved by technology

At present, there are domestic pressure relief schemes for the mining of steeply inclined coal seams, either because of single means or unreasonable parameters, which cannot economically and effectively reduce the stress concentration of the coal seam and the roof and floor, which seriously restricts the safety of steeply inclined coal seams. efficient mining

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  • Method for preventing and treating impact mine pressure through high-dipping super-high-seam mining roadway combined pressure relief
  • Method for preventing and treating impact mine pressure through high-dipping super-high-seam mining roadway combined pressure relief

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Embodiment Construction

[0017] The present invention will be further described below.

[0018] As shown in the figure, the concrete steps of the present invention are:

[0019] A. Determine the coal blasting and pressure relief arrangement at the side of the roadway: start from the two sides of the mining roadway 30m in front of the working face, and drill the blasting pressure relief borehole I10 at the side of the coal body 7 side of the working face, And arrange multiple blasting pressure relief drilling holes I10 in a single row forward along the side, and the distance between the blasting pressure relief drilling hole I10 farthest from the working face and the working face is not less than 150m; each blasting pressure relief drilling hole I10 is perpendicular to the mining roadway and has an angle of 3° to 5° with the horizontal direction of the coal body. Multiple explosive tubes are installed in each blasting pressure relief borehole I10, and the explosives in each blasting pressure relief bor...

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Abstract

The invention discloses a method for preventing and treating impact mine pressure through high-dipping super-high-seam mining roadway combined pressure relief. By implementing blasting pressure reliefon a roadway side and bottom corners, the stress concentration degree of a coal body around a roadway is decreased; and by implementing deep-hole blasting pre-cracking on a roof and floor rock stratum, a roof and floor can be collapsed in time along with working face coal caving, thus large-area roof and floor rock stratum suspension is prevented from being formed, the stress concentration degreeof roadway surrounding rock is decreased, meanwhile, strong vibration disturbance generated by sudden breaking of the roof and floor rock stratum is eliminated, and the risk that vibration induces the high-stress coal body around the roadway to generate the impact mine pressure dynamic disaster is reduced.

Description

technical field [0001] The invention relates to a method for preventing and controlling rock burst, in particular to a method for preventing and controlling rock burst by combined pressure relief of mining roadways in steeply inclined and extra-thick coal seams. Background technique [0002] Shock mine pressure is an explosive dynamic disaster in mines caused by the instantaneous and violent release of a large amount of elastic deformation accumulated in coal and rock under the action of high stress. Efficient production had a huge impact. Steeply inclined coal seams account for about 20% of my country's proven coal reserves, and with the increase in mining depth year by year, dynamic disasters represented by rock bursts are more likely to occur in deep mining of steeply inclined coal seams. Timely relief during depressurization and recovery is very necessary. At present, there are domestic pressure relief schemes for the mining of steeply inclined coal seams, either becaus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C37/00E21C41/18E21F17/18E21F17/00
CPCE21C37/00E21C41/18E21F17/00E21F17/18
Inventor 何江窦林名曹晋荣袁崇亮王崧玮葛庆
Owner CHINA UNIV OF MINING & TECH
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