Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Modeling method of material instability type roadway rock burst based on double-yield contour line model

A technology of rock burst and modeling method, applied in special data processing applications, instruments, electrical and digital data processing, etc. Accidents, the effect of ensuring safe production

Active Publication Date: 2019-08-06
CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]However, due to the complex mechanism of rock burst and numerous influencing factors, the understanding of the occurrence and prevention mechanism of material instability rock burst is still not specific enough. The guidance on site engineering is limited, resulting in frequent impact accidents, which seriously threaten the safe production of mines

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
  • Modeling method of material instability type roadway rock burst based on double-yield contour line model
  • Modeling method of material instability type roadway rock burst based on double-yield contour line model
  • Modeling method of material instability type roadway rock burst based on double-yield contour line model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0063] Such as figure 1 As shown, the present invention provides a method for modeling rock burst in a material-unstable roadway based on a double-yield contour model, comprising steps:

[0064] S1: According to the stress in the vertical direction of the coal body in the roadway, the stress situation of the coal body in the roadway is divided into two working conditions: working condition 1: the stress in the vertical direction of the coal body in the roadway is a uniform load; working condition Two: The vertical stress on the roadway coal body increases as the height increases; the roadway rock burst referred to in this application refers to material instability type rock burst, and the roadway referred to in this application is a rectangular roadway , which will not be described later.

[0065] S2: Establish the yield function model of the unbalanced force on the roadway coal body, and obtain the relationship model between roadway rock burst, roadway cohesion and internal ...

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 provides a modeling method of material instability type roadway rock burst based on a double-yield contour line model, which comprises the following steps: S1, dividing a roadway coal body stress working condition into two working conditions according to the stress condition of the roadway coal body in the vertical direction; s2, establishing a yield function model of unbalanced force applied to the roadway coal body to obtain a relation model of roadway rock burst, roadway cohesive force and internal friction angle under different working conditions. According to the method, thecritical state of the unstable rock burst of the roadway material can be represented by calculating the maximum elastic swelling amount; the maximum elastic swelling amount obtained through calculation serves as a threshold value for early warning judgment of the roadway rock burst, early warning can be accurately and rapidly conducted on roadway rock burst triggering, the method can be widely applied to on-site engineering guidance, occurrence of impact accidents is avoided or reduced, and safe production of a mine is guaranteed.

Description

technical field [0001] The invention relates to the technical field of underground safety prediction in coal mines, in particular to a modeling method for rock burst in a material-unstable roadway based on a double-yield contour model. Background technique [0002] The problem of rock burst is a prominent problem in the field of mining and rock engineering. With the increase of mining depth and mining intensity in my country, coal mine rock burst is becoming more and more serious and complex. Therefore, the mechanism of rock burst is studied to reveal its The occurrence process is of great significance to the safe and efficient production of coal mines in my country. Rock burst is a complex dynamic phenomenon in mines. Scholars from various countries have proposed a series of rock burst triggering theories, including strength theory, stiffness theory, energy theory, shock tendency theory, "three criteria" theory, "three factors " theory, instability theory, dynamic and stati...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/23Y02T90/00
Inventor 孙中光郭江涛赵光绪刘亚辉孟小红张金豪赵庆川何青松贺奎张加易周代勇刘慧洁任高建
Owner CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com