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Method for evaluating presplitting pressure relief effect of coal mine roof

An evaluation method and roof technology, which are applied in mining equipment, earthwork drilling, mining equipment, etc., to achieve the effect of strong operability, economical efficiency and good evaluation effect.

Pending Publication Date: 2022-08-09
CCTEG COAL MINING RES INST
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for evaluating the pressure relief effect of coal mine roof pre-cracking with low cost, strong operability and good effect, so as to realize the quantitative evaluation of the roof pre-cracking effect and solve the problem of current roof pre-cracking effect. Difficulties that cannot be quantified

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  • Method for evaluating presplitting pressure relief effect of coal mine roof
  • Method for evaluating presplitting pressure relief effect of coal mine roof
  • Method for evaluating presplitting pressure relief effect of coal mine roof

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specific Embodiment approach

[0036] Step 2) See figure 2 and image 3 In the first lane of the coal mining work surface, several top plate pre -cracking holes were constructed in the pre -cracking area of ​​the top plate. Each downtown 3 along the first lane road 1 is arranged in the pre -cracking area of ​​the top plate. In addition, each ceiling premature hole 3 extends inside the top plate from the top of the first lane road 1 along the top of the first lane. As a specific embodiment of the present invention, the pre -cracking hole of the top plate 3 is a blasting hole or hydraulic fracture hole for the top plate. The pre -fissure hole through the top plate 3 uses explosive blasting or high -pressure water fracture. The pre -cracking of the top plate, during or after the coal seam mining or after mining, makes the top plate near the coal seams easily sink and break.

[0037] Step 3) In the second lane of the coal recovery work surface, there are several displacements to observe the pilot 4 of the first lane...

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Abstract

The invention provides a method for evaluating a coal mine roof presplitting pressure relief effect. The method comprises the following steps: constructing a roof presplitting hole in a first roadway of a coal face; displacement observation holes inclining towards the first roadway are constructed in the second roadway of the coal face along the top plate non-presplitting area and the top plate presplitting area respectively; a displacement measuring device for measuring the downward displacement of each layer of top plate is mounted in the displacement observation hole of each layer of top plate; pre-splitting the top plate through the top plate pre-splitting hole; coal resources are stoped, and the working face passes through a roof non-presplitting area and a roof presplitting area; respectively measuring displacement data of each layer of top plate in the top plate non-presplitting area and the top plate presplitting area through a displacement measuring device; and respectively comparing displacement data of the roof at the same position of the roof pre-splitting area and the non-pre-splitting area, and evaluating the roof pre-splitting effect. The evaluation method for the coal mine roof presplitting pressure relief effect is low in cost, high in operability and good in effect, and the roof presplitting effect can be quantitatively evaluated.

Description

Technical field [0001] The invention involves the field of safety mining technology in coal mines, and specially involves an evaluation method of a premium and pressure -degradation effect of the top plate of coal mines. Background technique [0002] The thick layer of the coal mine is difficult to collapse during the mining process of the working surface, which is easy to form a large area of ​​suspended tops, causing large alleyway to deform, especially when the large area of ​​the top plate suddenly breaks, it can instantly produce a strong vibration and release a large amount of energy, which may cause cause A large area of ​​working surface or alleyway occurred, and even impact pressure occurred, which seriously affected the safety of the lives of the operators under the well. [0003] At present, the treatment measures for the hard thick layer of the coal mine are mainly before or during the working surface or during the mining process. Sexuality and intensity make it fail ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C37/00E21C37/12E21F17/00E21F17/18
CPCE21C37/00E21C37/12E21F17/00E21F17/18
Inventor 夏永学张晨阳扬光宇陆闯刘少虹潘俊锋秦子晗
Owner CCTEG COAL MINING RES INST
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