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Unloading-cracking-supporting collaborative anti-impact method based on coal body pressure relief and roof pre-cracking

A roof and coal body technology, applied in the direction of earth drilling, ground mining, mining equipment, etc., can solve the problems of not taking into account the main influencing factors of hard roof, so as to avoid engineering disturbance and mining disturbance, reduce the probability of occurrence, and achieve good results. The effect of the anchoring effect

Active Publication Date: 2022-08-02
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

[0003] At present, although the anti-scouring method based on the concept of "unloading-branch" coupling considers both pressure relief and reinforcement, it does not take into account the hard roof, which is the main factor affecting rock burst.

Method used

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  • Unloading-cracking-supporting collaborative anti-impact method based on coal body pressure relief and roof pre-cracking
  • Unloading-cracking-supporting collaborative anti-impact method based on coal body pressure relief and roof pre-cracking
  • Unloading-cracking-supporting collaborative anti-impact method based on coal body pressure relief and roof pre-cracking

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[0088] In order to make the objectives, technical solutions and beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the specific embodiments and the accompanying drawings. Certain embodiments of the present invention are described more fully hereinafter with reference to the accompanying drawings, some, but not all embodiments, of which are shown. Indeed, various embodiments of the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth in this number; rather, these embodiments are provided so that this invention will satisfy applicable legal requirements.

[0089] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "inside", "outside", "upper", "lower", "front", "rear", etc. are based on those shown in the accompanying drawings. The orientati...

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Abstract

The invention provides an unloading-cracking-supporting collaborative anti-impact method based on coal body pressure relief and roof presplitting, and relates to the technical field of coal mine rock burst prevention and control. The unloading-cracking-supporting collaborative anti-impact method based on coal body pressure relief and roof presplitting comprises the following steps that 1, a tunneling coal seam is subjected to pressure relief; 2, pre-splitting a low-position top plate in the tunneling process; 3, roadway surrounding rock supporting and reinforcing supporting are carried out; 4, pressure relief is conducted on a roadway bottom plate; 5, presplitting a high-position roof before mining of the working face; and 6, pressure relief and support of surrounding rock of the advance roadway in the working face stoping process. According to the unloading-cracking-supporting cooperative anti-impact method based on coal body pressure relief and top plate presplitting, local pressure relief, top plate presplitting and reinforcing and supporting construction are progressively carried out in the whole period of the coal mine stope face so as to achieve prevention and treatment of rock burst of the stope face.

Description

technical field [0001] The invention relates to the technical field of coal mine rock burst prevention and control, in particular to a unloading-cracking-branch synergistic anti-scouring method based on coal body pressure relief and roof pre-splitting. Background technique [0002] As a typical coal mine dynamic disaster, rockburst seriously threatens the safe production and operation of mines. With the increase of coal mining intensity and depth, the frequency of rock burst increases significantly. Statistics show that the number of rock bursts occurring in roadways accounts for nearly 90% of the total number of rock bursts. In order to solve the problem of roadway impact, various prevention technologies have emerged. The rockburst prevention technology mainly includes local pressure relief (including drilling pressure relief, drilling blasting, coal seam water injection, roof pre-splitting and floor blasting, etc.) and reinforcement support (including anchor rod, anchor ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/18E21F17/18
CPCE21C41/18E21F17/18
Inventor 郭伟耀谭彦陈玏昕谭云亮赵同彬
Owner SHANDONG UNIV OF SCI & TECH
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