浅埋坚硬覆岩下开采地表塌陷机理研究  

Study on the catastrophic collapse of surface land induced by mining under a shallow and hard strata

作　　者：王金安[1] 赵志宏[1] 侯志鹰[2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]中国矿业大学(北京)资源与安全工程学院,北京100083

出　　处：《煤炭学报》2007年第10期1051-1056,共6页Journal of China Coal Society

基　　金：教育部高等学校博士学科点专项科研基金(20040008025)

摘　　要：对浅埋坚硬覆岩下开采地表塌陷机理进行了数值模拟.结果表明,采场上方存在高应力束组成的"复合应力拱","外应力拱"承担覆岩及地表土的自重并将其传递至采场两侧实体煤内,"内应力拱"主要承担悬空顶板的重量并传递至煤柱."复合应力拱"形态随时间推移而不断演化,"内应力拱"不断合并抬升直至与"外应力拱"重合,最终拱肩处岩体受拉压复合应力作用而首先开裂,从而破坏了"复合应力拱"成拱机制而导致采场上方覆岩断裂、地表塌陷.Studied the catastrophic collapse of surface land induced by mining under a shallow and hard strata by numerical simulation.Results show that,there is a complex stress arch composed by high stress binds,where an external-stress-arch bears weight of strata and overburden and transmit the stress into the virgin coal seam in the vicinity of working face,while an inner-stress-arch bears weight of roof and transmit the stress onto coal pillars.The shape of complex stress arch varies with the time,and the inner-s...

关 键 词：浅埋坚硬覆岩 地表塌陷 复合应力拱 

分 类 号：TD325[矿业工程—矿井建设]