Roadway protection method for multi-coal-seam gob-side entry retaining in real crustal stress environment

Roadway protection method for multi-coal-seam gob-side entry retaining in real crustal stress environment

The invention discloses a roadway protection method for multi-coal-seam gob-side entry retaining in a real crustal stress environment. The method comprises the following steps: step 1, sample preparation; 2, a multi-field coupling coal and rock mass dynamic disaster prevention and control technology...

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Hauptverfasser: ZHANG DONGMING, YANG GUOHE, SUN JUZHENG, XIAO WEIJING, NIU ZEHUA, ZHANG JIANGUO, DU WEIHANG, PEI GANG, WANG MAN, YU BEICHEN, ZHANG JINJING
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Sprache:chi ; eng
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INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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creator ZHANG DONGMING
YANG GUOHE
SUN JUZHENG
XIAO WEIJING
NIU ZEHUA
ZHANG JIANGUO
DU WEIHANG
PEI GANG
WANG MAN
YU BEICHEN
ZHANG JINJING
description The invention discloses a roadway protection method for multi-coal-seam gob-side entry retaining in a real crustal stress environment. The method comprises the following steps: step 1, sample preparation; 2, a multi-field coupling coal and rock mass dynamic disaster prevention and control technology simulation system is prepared for installation; thirdly, true triaxial prestress is applied; fourthly, true triaxial mining-induced stress is applied, the stress value of a fourth loading device in the Z direction is changed to be 6 MPa, 8 MPa and 10 MPa, unloading is conducted till a coal seam roof is damaged, and after damage, sigma z4 is kept unchanged so as to simulate the roadway protection effect of gob-side entry retaining of the goaf; 5, starting a high-speed camera; carrying out visual monitoring and recording on the whole loading process; 6, performing other tests in the same group; 7, ending the test; the roadway protection effect simulation of large-size multi-coal-seam gob-side entry retaining can be
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subjects INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
title Roadway protection method for multi-coal-seam gob-side entry retaining in real crustal stress environment
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