Pressure relief and consolidation synergizing prevention and control method for rock burst in deep coal drift

A rock burst and deep technology, applied in earthwork drilling, wellbore/well components, optical device exploration, etc., can solve the problem that the thickness of surrounding rock and its safety cannot be determined, it is not suitable for discontinuous damage areas, and it cannot be scientifically determined The depth of deep hole blasting and the optimal blasting time to achieve the effect of avoiding disconnection between pressure relief and reinforcement, avoiding blindness, and preventing rock burst

Inactive Publication Date: 2011-10-19
SHANDONG UNIV OF SCI & TECH
View PDF7 Cites 68 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] First, when the deep hole blasting is loosened and blasted, the depth of the deep hole blasting and the best blasting time cannot be scientifically determined;
[0008] Second, it is impossible to determine the surrounding rock thickness and safety of deep coal roadway through strengthening support to prevent rock burst;
[0009] T

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
  • Pressure relief and consolidation synergizing prevention and control method for rock burst in deep coal drift
  • Pressure relief and consolidation synergizing prevention and control method for rock burst in deep coal drift
  • Pressure relief and consolidation synergizing prevention and control method for rock burst in deep coal drift

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0037] The following takes the 2222 east return airway of a certain mine as an example to further illustrate the technical methods.

[0038] The 2222 east return airway of a certain mine is located in the second sub-stage of the -1100m expansion area, which is used for the ventilation, pedestrian, transportation, pipeline laying, and face equipment of the 2222 east mining face. The roadway is driven along the second layer of coal, the thickness of the coal seam is 2.2-3.4m, the inclination angle of the coal seam is 19-21°, and the average inclination angle is 20.5°; the coal seam's Proctor hardness coefficient f=2-6, which has an impact tendency. The roof of the coal seam is made of fine sandstone and medium sandstone. The fine sandstone has an average thickness of 3m and is gray-white with well-developed joints. The medium sandstone has an average thickness of 15m, gray-white, medium-grained, and thick bedding. The designed roadway section is a trapezoid with unequal heights. Th...

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 discloses a pressure relief and consolidation synergizing prevention and control method for rock burst in a deep coal drift. According to the method, based on deep hole photographic detection and analytic processing technology, discontinuous rupture distribution of the surrounding rocks in the deep coal drift and the evolution law of abutment pressure with mining are firstly detected, the deep hole blasting depth is determined according to the detection results and the pressure generated by deep blasting is relieved, and the range and consolidation method of barrier layers of the shallow surrounding rocks around the roadway surrounding rocks are finally determined; therefore, optimal synergy of pressure relief and consolidation is realized and and the aim of prevention and control of the rock burst in the deep mining coal drift is achieved.

Description

technical field [0001] The invention relates to a method for preventing and controlling rock burst during coal mine mining. Background technique [0002] With the transfer of coal mining to deep mining, the rock burst in my country's coal mines is becoming more and more serious, and the rock burst in coal roadways accounts for about 80% of the total. How to effectively prevent and control the deep coal roadway (rock burst) at a distance of more than 800 meters from the surface has become one of the important bottlenecks in the safe mining of deep coal in my country. [0003] At present, the prevention and control of roadway surrounding rock burst mainly focuses on three aspects: monitoring and early warning, coal pre-fracture and surrounding rock reinforcement. In terms of rock burst monitoring, there are microseismic, acoustic emission (ZL91204948), electromagnetic radiation, etc. [0004] The coal body pre-cracking treatment method mainly includes after the coal mining f...

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): E21B49/00G01V8/10H04N7/18F42D3/04E21D20/00E21D20/02
Inventor 谭云亮宁建国赵同彬张泽李海涛
Owner SHANDONG UNIV OF SCI & 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