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Roadside packing gob-side entry retaining top-cutting explosion pressure relief method

A technology of blasting pressure relief and roof cutting pressure relief, which is applied in the direction of filling, earthwork drilling, safety devices, etc., can solve the problems of roadside filling body fracturing and roadway retention failure, etc., so as to improve the stability of surrounding rock and reduce the The amount of excavation, the effect of the obvious effect

Inactive Publication Date: 2015-07-22
HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the disturbance caused by the collapse of the goaf and the action of the cantilever beam formed by the rock formation that has not collapsed, it is easy to cause the filling body beside the roadway to be fractured, resulting in the failure of the roadway retention

Method used

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  • Roadside packing gob-side entry retaining top-cutting explosion pressure relief method
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  • Roadside packing gob-side entry retaining top-cutting explosion pressure relief method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 2:

[0036] In the roadside filling method described in Example 1, the top-cutting blasting and pressure relief method of gob-side entry retaining, the first step is to determine the top-cutting method, drilling construction time and location, which are taken during the mining of the working face and the construction process of roadside filling. , a method for deep hole blasting to relieve pressure on the roof of the reserved roadway.

Embodiment 2

[0038] In the method for pressure relief of roadside filling and top-cutting blasting in gob-side entry retention described in Example 1, the second step to determine the drilling parameters of top-cutting pressure relief blasting is that the drilling position is close to the goaf side of the filling body, and the drilling angle Along the direction of the roadway, it is 40--60° from the roof. The drilling depth is 3 to 4 times the mining height of the working face. The depth of the charging hole is different from that of the control hole;

Embodiment 3

[0040] In the roadside filling method described in Example 1, the top-cutting blasting and pressure relief method of gob-side entry retention, the third step of setting up deep-hole blasting drilling and charging and sealing holes is to work in advance after the above-mentioned top-cutting drilling parameters are determined. After the drilling construction is completed, the mining distance of one round shift in the advance working face is about 10~15m for interval charging, the control hole is not charged, and the hole sealing operation is carried out after charging.

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Abstract

The invention discloses a roadside packing gob-side entry retaining top-cutting explosion pressure relief method which comprises the following four steps: I, confirming a top-cutting method, the drilling construction time and a drilling construction site; II, confirming top-cutting pressure relief explosion drilling parameters; III, drilling deep-hole explosion holes and explosive filling and sealing holes; IV, performing explosion top-cutting pressure relief. The roadside packing gob-side entry retaining top-cutting explosion pressure relief method is applied to roadside packing gob-side entry retaining top-cutting explosion pressure relief.

Description

technical field [0001] The invention relates to a pressure relief method for roadside filling and top cutting blasting of gob-side entry retaining. Background technique [0002] Multiple coal mining faces in the section are generally mined sequentially, and coal pillars need to be left between adjacent working faces to isolate the goaf. The size of the remaining coal pillars is often 20m, and the concentrated stress formed by the coal pillars is likely to cause deformation of the surrounding rock, rock burst and other mine disasters, and waste a lot of coal resources. Gobside entry retaining technology is to keep one of the mining roadways by strengthening the roof support and roadside support as the working face advances, and use it as a mining roadway in the next working face, which can reduce the amount of roadway excavation and ease The work surface is continuously tense and the waste of resources is reduced. [0003] Gob-side filling is the main technology to realize ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/18
CPCE21C41/18E21F15/00
Inventor 王维维康宇张迎新代少军徐涛刘锡明吴祥业蒋莉周静张亮
Owner HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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