采矿与安全工程学报2017，Vol.34Issue(4)：663-669,7.DOI:10.13545/j.cnki.jmse.2017.04.009
"三硬"煤层巷道冲击地压发生机理研究
The occurrence mechanism of rock burst in the "three hard" coal seam roadway
摘要
Abstract
The occurrence mechanism of rock burst in the "three-hard" coal seam roadway was studied systematically through the comprehensive method of field measurement,theoretical analysis and nu-merical simulation. The in-situ stress measurement results have shown that there is obvious horizontal tectonic stress in Datong mining area; the mechanical analysis has shown that the rock burst of the coal wall has linear correlation with the lateral pressure coefficient; according to the theory of Key Layer,the influence factors of the hard floor burst are the thickness of the key layer in the bottom,the distance between the key layer and the floor of the roadway,tectonic stress,and mining activity; the numerical simulation has shown that the horizontal displacement of the roadway walls is linearly proportional to the horizontal load,and that if vertical cracks exist or will appear in a certain depth of the roadway walls and the coal bed is separated from the roof and the floor,the rock burst with coal wall holistically pushed out will occur in the two sides of the roadway given that the horizontal load is large enough; with the increase of the roadway width,the horizontal tensile stress in the bottom develops to a deeper posi-tion and the separation appears,which caused the sudden fracture of the bottom key layer and thus the floor rock burst.关键词
冲击地压/"三硬"条件/冲击机理/水平荷载/巷道宽度Key words
rock burst/"three-hard" conditions/bursting mechanism/horizontal load/roadway width分类
矿业与冶金引用本文复制引用
王旭宏,杜献杰,冯国瑞,康立勋.."三硬"煤层巷道冲击地压发生机理研究[J].采矿与安全工程学报,2017,34(4):663-669,7.基金项目
国家自然科学基金优秀青年科学基金项目(51422404) （51422404）
国家自然科学基金项目(51574172) （51574172）
山西省平台基地和人才专项项目(优秀人才科技创新项目)(201605D211003) （优秀人才科技创新项目）
山西省高等学校创新人才支持计划项目 （）
山西省煤基重点科技攻关项目(MQ2014-12) （MQ2014-12）
