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Method for controlling roadway deformation by presplitting blasting pressure release of base angle of roadway protection coal pillar

A technology of pre-splitting blasting and coal pillars, which is applied in the field of pre-splitting blasting at the bottom corner of coal pillars to control roadway deformation. It can solve the problems of interfering with the production of the working face, labor and time, and construction difficulties, and save manpower and materials. Cost, improved stress environment, simple construction effect

Inactive Publication Date: 2017-06-23
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The bottom heave treatment of the roadway is carried out by measures such as excavating pressure relief grooves, floor grouting, and floor anchoring, which has the disadvantages of high cost, labor and time, difficult construction, and interference with the production of the working face.

Method used

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  • Method for controlling roadway deformation by presplitting blasting pressure release of base angle of roadway protection coal pillar
  • Method for controlling roadway deformation by presplitting blasting pressure release of base angle of roadway protection coal pillar

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Embodiment Construction

[0022] Below in conjunction with accompanying drawing and embodiment, the present invention will be further described:

[0023] Such as figure 1 , figure 2 As shown, there are all kinds of mechanical equipment and equipment required for comprehensive mechanized coal mining in the coal mining face 1, the return air lane 8 is the recovery roadway through which the dirty air in the mine ventilation system passes, and the transportation lane 9 is the mining roadway used in the mine transportation system. In the mining roadway for coal transportation and material transportation, the goaf 10 is the hollow area left after the coal seam is mined. The roadway coal pillar 3 is the unmined part of the coal body that supports and isolates the roadway. The method for controlling the deformation of the roadway by pre-splitting blasting at the bottom corner of the roadway coal pillar proposed by the present invention for pressure relief, the specific steps are as follows:

[0024] A row ...

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Abstract

The invention discloses a method for controlling roadway deformation by presplitting blasting pressure release of a base angle of a roadway protection coal pillar. In the method, outside the scope of an advanced supporting area of a working surface, drilling is constructed at a certain angle in the direction towards a bottom plate of the coal pillar at the base angle of the roadway protection coal pillar; the bottom plate is presplit in a group charging one-time blasting, so that concentrated stress of the roadway protection coal pillar and a surrounding rock of a roadway is effectively released, the deformation of the roadway, in particular the deformation of the bottom plate, is reduced, and a control effect of the surrounding rock of the roadway is improved; compared with the traditional heaving floor treatment method of excavation of a pressure relief groove, floor grouting, floor anchoring and the like, the method disclosed by the invention has the advantages that the construction is simple, the labor and the material cost are saved, and high efficiency and stability are realized, therefore, the applicability is wide.

Description

technical field [0001] The invention relates to a method for controlling the deformation of a roadway, in particular to a method for controlling the deformation of the roadway by pre-splitting blasting at the bottom corner of a roadway coal pillar for pressure relief. Background technique [0002] Engineering practice shows that controlling the deformation of the roadway is the key to ensure the normal use of the roadway, and the problem of surrounding rock control has always been one of the technical problems affecting the production and construction of coal mines in my country. After the roadway was excavated, the surrounding rock stress environment changed. Under the severe influence of the lateral bearing pressure of the goaf, the advanced bearing pressure of the working face and the mining of the working face, the deformation and damage of the surrounding rock of the roadway along the gob were serious, especially the bottom heave. , It is difficult to manage (especially...

Claims

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Application Information

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IPC IPC(8): E21D9/00
CPCE21D9/006
Inventor 王方田梁宁宁赵宾
Owner CHINA UNIV OF MINING & TECH
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