倾斜煤层回采巷道上帮煤体滑移危险分析与应用  

Slipping hazard analysis and engineering application in up-right-side coal body of roadway for the incline coal seams

作　　者：刘少伟[1] 张辉[1] 张伟光[1] 董士举[1] 

机构地区：[1]河南理工大学能源科学与工程学院,河南焦作454000

出　　处：《中国矿业大学学报》2011年第1期14-17,共4页Journal of China University of Mining & Technology

基　　金：河南省重点科技攻关项目(092102310312);2007年度国家安全生产科技计划项目(07-144)

摘　　要：基于目前煤矿常见的倾斜、特别是急倾斜煤层沿顶掘进回采巷道上帮经常出现支护困难,片帮严重的现象.利用毕肖普算法,建立了上帮煤体失稳模型,推导出上帮煤体稳定性安全系数的计算公式,将理论研究成果应用于某矿大倾角煤层掘进中煤巷.结果表明:该条件下,上帮煤体临界失稳路径为半径19.8 m,圆心距下帮水平距离为13.3 m的滑移面,巷道上帮到临界失稳滑移面的最大水平距离为2.12 m.Inclined coal seams are common.Support problems and serious rib falls are frequent when tunneling along deep dip angle seams.The instability model of up-right-side coals has been deduced by Bishop＇s algorithm and the up-rib coal body＇s stability safety factor were deduced.The result has been applied into a some driving roadway with deep dip angle coal seams.The results show that the radius of the critical instable path is 19.8 m in up-right-ride mining;the level distance between centre of article and down-right-side coal is 13.3 m;the maximizing level distance from up-right-side coal to critical instable path is 2.12 m.

关 键 词：倾斜煤层 失稳滑移 毕肖普算法 安全系数 

分 类 号：TD322.4[矿业工程—矿井建设]