沿顶掘进回采巷道上帮煤体失稳区域预测  

Forecasting for instability zones in up-side coal body of mining roadway drived along the roof

作　　者：刘少伟[1] 张辉[1] 张伟光[1] 董士举[1] 郑新旺[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454003

出　　处：《煤炭学报》2010年第9期1430-1434,共5页Journal of China Coal Society

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：针对目前煤矿沿顶掘进回采巷道在掘进过程中上帮煤体突然出现片帮,支护后上帮煤体大面积整体失稳滑移现象,利用毕肖普条分法建立了上帮煤体失稳滑移力学模型,推导出上帮煤体稳定安全系数计算公式。结合某矿现场工程地质条件,针对煤层倾角变化的特点,对不同倾角情况下回采巷道上帮煤体失稳滑移区域进行预测,提出了采用超前锚注方法解决大倾角巷道煤帮滑移问题的方法。In view of such a situation that side falling in up-side coal body rib took place suddenly in during of driving along the roof in the mining roadway,as well as large-scale slip appeared once supporting the up-side coal body.Mechanical model of unstable slide in upside coal body was set up using Bishop＇s algorithm method.Further more,the computing formula of safe coefficient to stabilize the upside coal body was deduced out.Combined engineering geological conditions in a mining field with the dynamic variation of dip angle coal seam,unstable slip zones of the upside coal in the mining roadway accompanied by different dip angle situation were forecasted.In addition,the method to solve the sliding in big dip coal slide by using of ahead bolt-grouting were come up with.

关 键 词：回采巷道 煤体滑移 失稳区域预测 

分 类 号：TD322.4[矿业工程—矿井建设]