Prevention method of shallow-buried steeply-inclined coal seam rock burst

A technology of rock burst and steep inclination, which is applied in the field of prevention and control of rock burst in coal mining, and can solve problems such as accidents, lack of preventive measures, and coal seam burst pressure.

Inactive Publication Date: 2014-12-17
CHINA UNIV OF MINING & TECH
View PDF3 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many prevention and control methods for deep rockburst including steeply inclined coal seam rockburst, but for such figure 1 The steeply inclined shallow coal seams with a dip angle of 45° to 90° shown have no effective control measures. For example, there are steeply inclined shallow coal seams with certain reserves in western my country, especially in Xinjiang mining ...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Prevention method of shallow-buried steeply-inclined coal seam rock burst
  • Prevention method of shallow-buried steeply-inclined coal seam rock burst
  • Prevention method of shallow-buried steeply-inclined coal seam rock burst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] A method for preventing and controlling rockburst in shallowly buried steeply inclined coal seams, comprising the following steps:

[0029] A. If image 3 As shown, before the mining of the coal seam, drill holes from the ground to pre-split and blast the roof and floor rock layers or rock pillars of the coal seam, and 1 is the location of the ground drilling and blasting before the coal seam mining;

[0030] Pressure relief blasting is a pressure relief measure that changes the stress distribution by drilling and blasting in rock pillars. Vibratory blasting in the rock pillar can release the elastic energy accumulated in the rock pillar to the greatest extent, forming a pressure relief damage zone and reducing the integrity. Pressure relief blasting is the most commonly used method in rock burst hazard relief measures. The rock mass after blasting fills the goaf, which increases the stability of the rock mass or rock pillar and reduces the possibility of rock burst. ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a prevention method of shallow-buried steeply-inclined coal seam rock burst. The prevention method includes following steps: (A) drilling a hole from ground to pre-splitting blasting a terrane or a rock pillar in floor and roof of a coal seam; (B) performing water-injection softening and pressure-releasing blasting to a mined coal seam; (C) after the coal seam being mined, performing deep-hole blasting to the floor and roof of the coal seam so that a hanging arch of the floor and roof is cut in advance and accumulated bending elasticity energy is released; and (D) filling a goaf of a working face with nonflammable objects after the coal seam being mined. In the prevention method, energy of the floor and roof are released through various measurements so that a strong rock burst disaster caused by fractured terrane or the rock pillar in the floor and roof can be prevented well. The method can effectively reduce an apparent intensity of a dynamic disaster during a mining process of a shallow-buried steeply-inclined coal seam and can reduced property loss and danger of worker life.

Description

technical field [0001] The invention relates to a method for preventing and controlling rock burst in shallowly buried steeply inclined coal seams, and belongs to the technical field of preventing and controlling rock burst in coal mine mining. Background technique [0002] In recent years, with the increasing depth of coal mining in my country, the problem of rock burst in many mining areas has become more and more serious. The pressure in the coal and rock mass exceeds the strength limit of the coal and rock mass, and the energy accumulated in the coal and rock mass around the roadway or stope is released suddenly, and an explosive accident occurs in the roadway, and the power throws the coal rock to the roadway, making a violent sound It is a kind of mine earthquake induced by mining, and it is also a kind of disaster. It not only causes damage to shafts, casualties, and damage to ground buildings, but also causes gas, coal dust explosions and floods, interferes with the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): E21F15/00F42D3/00E21C41/16
Inventor 陆菜平刘广建张农薛俊华刘洋左源耀
Owner CHINA UNIV OF MINING & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap