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

Three-stage energy absorption support design method for coal mine rock burst roadway

A technology of rock burst and design methods, applied in mining equipment, seismology, earthwork drilling and mining, etc., can solve the problems of cumbersome operation, unconsidered, inaccurate kinetic energy, etc., and achieve the effect of simple operation

Pending Publication Date: 2020-07-14
LIAONING TECHNICAL UNIVERSITY
View PDF7 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can evaluate and correct the support parameters designed by experience or engineering type, but the operation is very cumbersome
In addition, when calculating the kinetic energy generated by the impact of loose surrounding rock, this document takes the thickness of rock mass rupture as 1.0m for calculation, without considering the impact loosening radius of surrounding rock or the range of cracks generated by impact of rock mass. When rock burst occurs, due to the actual The impact loosening radius of the surrounding rock of the roadway (the range of cracks produced by the impact of the rock mass) reaches more than ten meters or even tens of meters, so the calculated kinetic energy of the impact of the loose surrounding rock is not accurate enough. Use the calculated value of the kinetic energy to verify whether the existing support parameter design is correct. Reasonable is not accurate enough

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
  • Three-stage energy absorption support design method for coal mine rock burst roadway
  • Three-stage energy absorption support design method for coal mine rock burst roadway
  • Three-stage energy absorption support design method for coal mine rock burst roadway

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A certain mine is a rock burst mine, the geological structure of the mine is simple, and the coal seam has the risk of impact. The coal seam recovery roadway has a span of 5m and a height of 3.5m. When the most serious rock burst occurred in this mine, the microseismic energy monitored by the microseismic monitoring system was 1.3×10 6 J, the distance between the maximum microseismic source and the damage point of the roadway is 40m, and the surface displacement of the roadway caused by rock burst is R=0.4m.

[0034] After the impact occurs in the mine, the anti-scour energy-absorbing support is used as one of the measures for rock burst control.

[0035] to combine figure 1 , the specific steps of the anti-scour energy-absorbing support design in this embodiment are as follows:

[0036] (1) According to the survey, the most serious rock burst occurred in the mine caused the surface displacement of the roadway R = 0.4m, and the maximum energy value E detected by the m...

Embodiment 2

[0046] A mine is a rock burst mine with a simple geological structure. The coal seam mining roadway has a span of 5m and a height of 3.5m. When the most serious rock burst occurred in this mine, the microseismic energy monitored by the microseismic monitoring system was 2.7×10 6 J, the distance between the maximum microseismic source and the damage point of the roadway is 45m, and the surface displacement of the roadway caused by rock burst is R=0.5m.

[0047] After the impact occurs in the mine, the anti-scour energy-absorbing support is used as one of the measures for rock burst control.

[0048] to combine figure 1 , the specific steps of the anti-scour energy-absorbing support design in this embodiment are as follows:

[0049] (1) According to the survey, the most serious rock burst occurred in the mine caused the surface displacement of the roadway R = 0.5m, and the maximum energy value E detected by the mine microseismic system L =2.7×10 6 J, the distance L between t...

Embodiment 3

[0059]A mine is a rock burst mine with a simple geological structure and relatively hard coal seam with a hard roof. The coal seam mining roadway has a span of 5m and a height of 3.5m. When the most serious rock burst occurred in this mine, the microseismic energy monitored by the microseismic monitoring system was 1.0×10 7 J, the distance between the maximum microseismic source and the damage point of the roadway is 55m, and the surface displacement of the roadway caused by rock burst is R=0.5m.

[0060] After the impact occurs in the mine, the anti-scour energy-absorbing support is used as one of the measures for rock burst control.

[0061] combine figure 1 , the specific steps of the anti-scour energy-absorbing support design in this embodiment are as follows:

[0062] (1) According to the survey, the most serious rock burst occurred in the mine caused the surface displacement of the roadway R = 0.5m, and the maximum energy value E detected by the mine microseismic syste...

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 three-stage energy absorption support design method for a coal mine rock burst roadway. The method comprises the following steps: acquiring roadway surface displacement R caused by the most serious rock burst of a mine, a maximum energy value EL monitored by a mine micro-seismic system and a distance L0 between a maximum micro-seismic source and a roadway damage point; calculating a roadway surrounding rock impact loosening radius R0; calculating loose surrounding rock impact kinetic energy Ec within the roadway strike length; selecting energy-absorbing anti-impact anchor cables, energy-absorbing O-shaped sheds and energy-absorbing hydraulic supports as energy-absorbing supporting components to form a first-stage anti-impact energy-absorbing supporting mode, a second-stage anti-impact energy-absorbing supporting mode and a third-stage anti-impact energy-absorbing supporting mode; and calculating energy absorption support parameters by adopting a successive progressive method according to an energy balance principle to determine an energy absorption support mode. According to the design method, different energy absorption supporting modes and supporting parameters can be selected according to different released energy of the non-impact ground pressure, so that quantitative design of energy absorption supporting of the impact dangerous roadway is realized; and safety accidents caused by the fact that technicians select supporting parameters only according to experience or engineering categories and the anti-impact capacity is too small or the phenomenon that the supporting cost is increased due to the fact that the anti-impact capacity is too large are effectively avoided.

Description

technical field [0001] The invention relates to the technical field of coal mine roadway support, in particular to a three-stage energy-absorbing support design method for coal mine rock burst roadway. Background technique [0002] Rockburst is one of the most serious dynamic disasters encountered in the coal mining process. When rockburst occurs, the elastic energy stored in the coal-rock system is released instantaneously, which will cause damage to support equipment, deformation of the mining space, and casualties. loss. [0003] In recent years, energy-absorbing support for coal mine roadways has become an important research topic for preventing and controlling rock burst. For example, the theoretical research and application of rock burst mine roadway support published in Volume 39, Issue 2 of the Journal of Coal Science, and ZL201110363855.7, ZL201310132032.2, ZL201210579310.4, ZL201210086781.1, ZL201210248890.9, ZL201510297L2015102975 .7 and other patents respective...

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): G06F30/13G01V1/28E21D21/00
CPCG01V1/288E21D21/00
Inventor 王爱文潘一山范德威肖永惠徐连满代连朋蔡荣宦
Owner LIAONING TECHNICAL UNIVERSITY
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