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A Method for Relief of Rock Burst

A technology of rock burst and crisis relief, which is applied in surface mining, earth drilling, underground mining, etc., can solve the problem of only a small degree of relief of rock burst, reverse water phenomenon, and loss of pressure regulating water injection. and other problems, to achieve the effect of a small number of drill holes, avoiding rock burst accidents, and simple operation steps

Active Publication Date: 2018-12-28
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional methods of preventing and controlling rock burst mainly include deep hole blasting for pressure relief, drilling for high-pressure water injection cutting, water injection softening, etc. Among them, the deep hole blasting pressure relief method has a small aperture, and the defined deep hole is several meters to more than ten meters. The length of the working face is relatively small, there is a certain risk in the blasting process, and the occurrence of rock burst can only be alleviated to a small extent; the drilling high-pressure water injection cutting and water injection softening methods are limited by the conditions of the coal body, and often one water injection After only a few minutes of water injection in the hole, the reverse water phenomenon occurs, thus losing the function of pressure regulating water injection, which limits the use of the method to a certain extent

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  • A Method for Relief of Rock Burst
  • A Method for Relief of Rock Burst
  • A Method for Relief of Rock Burst

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Effect test

Embodiment 1

[0036] A method for relieving rock burst, comprising the following steps:

[0037] Step 1, comprehensive analysis of crisis relief space

[0038] Combined with the basic conditions of the specific construction mine, comprehensively analyze the coal seam geological occurrence conditions and in-situ stress distribution characteristics in the relief space, the physical and mechanical parameters of the coal seam and surrounding rock, and estimate the peak bearing pressure in front of the working face according to the numerical simulation method. The peak position is at 5m to 20m in front of the coal mining face, analyze the construction economic cost and construction technical conditions;

[0039] Step 2, determine the large diameter drilling parameters

[0040] According to the comprehensive analysis of the risk-relief space, considering the large-diameter borehole under the two-way unequal pressure stress field, the maximum boundary R of the plastic zone around the large-diamet...

Embodiment 2

[0051] Step 1, comprehensive analysis of crisis relief space

[0052] Combined with the basic conditions of the specific construction mine, comprehensively analyze the coal seam geological occurrence conditions and in-situ stress distribution characteristics in the relief space, the physical and mechanical parameters of the coal seam and surrounding rock, and estimate the peak bearing pressure in front of the working face according to the numerical simulation method. The peak position is at 5-20m in front of the coal mining face, analyze the construction economic cost and construction technical conditions;

[0053] Step 2, determine the large diameter drilling parameters

[0054] According to the comprehensive analysis of the risk-relief space, considering the large-diameter borehole under the two-way unequal pressure stress field, the maximum boundary R of the plastic zone around the large-diameter borehole is determined according to the coal seam thickness of the mined coal ...

Embodiment 3

[0064] A method for relieving rock burst, comprising the following steps:

[0065] Step 1, comprehensive analysis of crisis relief space

[0066] Combined with the basic conditions of the specific construction mine, comprehensively analyze the coal seam geological occurrence conditions and in-situ stress distribution characteristics in the relief space, the physical and mechanical parameters of the coal seam and surrounding rock, and estimate the peak bearing pressure in front of the working face according to the numerical simulation method. The peak position is at 5-20m in front of the coal mining face, analyze the construction economic cost and construction technical conditions;

[0067] Step 2, determine the large diameter drilling parameters

[0068] According to the comprehensive analysis of the risk-relief space, considering the large-diameter borehole under the two-way unequal pressure stress field, the maximum boundary R of the plastic zone around the large-diameter b...

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Abstract

The invention discloses a danger reliving method for impact ground pressures, and belongs to the field of coal mining technologies. The danger relieving method for the impact ground pressures includes combining comprehensive conditions of particular danger relieving spaces with one another, determining the maximum boundaries R of plastic zones around large-diameter drilled holes according to the coal-seam thicknesses of mined coal seams and designing the radiuses r of the large-diameter drilled holes; forming n large-diameter drilled holes with the diameters of 2r in front coal bodies of coal mining working faces when danger is about to be relieved for the coal mining working faces and forming a large-diameter drilled hole with the diameter of 2r in a coal body of a side of each forward coal side of each stoping roadway. The n large-diameter drilled holes in the front coal bodies are parallel to coal walls, and the large-diameter drilled hole in the coal body of the side of each front coal side of each stoping roadway is parallel to the front coal side. The danger relieving method has the advantages that the danger relieving method includes simple operation steps, only a few quantity of drilled holes need to be formed, pressure relief by blasting can be omitted, and the danger relieving method is particularly applicable to mines with impact ground pressure tendency and high coal-seam gas contents.

Description

technical field [0001] The invention belongs to the technical field of coal mine mining, and in particular relates to a method for relieving rock burst. This method adopts the method of arranging large-diameter boreholes parallel to the coal wall of the coal mining face or the coal side of the mining roadway in the coal body in the relieving space. Large-diameter drilling relieves danger. Background technique [0002] Rock burst is one of the most destructive disasters among all kinds of disasters in coal mines. It can destroy the mining face, damage the roadway, cause a large number of casualties and huge economic losses, and seriously threaten the safety of coal mine production. Research on rock burst prevention Work is the guarantee of safe production in coal mines. Traditional methods of preventing and controlling rock burst mainly include deep hole blasting for pressure relief, drilling for high-pressure water injection cutting, water injection softening, etc. Among th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/18
CPCE21C41/18
Inventor 赵志强马念杰鱼琪伟高旭吴峥
Owner CHINA UNIV OF MINING & TECH (BEIJING)