不稳定残余支承压力下注浆锚索支护技术在沿空掘巷的应用  

Application of grouting anchor cable supporting technology under unstable residual bearing pressure in roadway driving along next goaf

作　　者：李仲辉[1] 李付臣[1] 李华[1] 

机构地区：[1]兖州煤业股份有限公司鲍店煤矿,山东省邹城市273500

出　　处：《中国煤炭》2012年第9期51-53,120,共4页China Coal

摘　　要：由于采掘接替紧张,鲍店煤矿103下03工作面轨道巷在上区段回采完毕后不待采空区顶板活动稳定即留小煤柱沿空掘进。在不稳定残余支承压力影响下,巷道掘进期间即出现大变形,且进入变形稳定期煤帮流变性显著。分析认为,窄煤柱被严重破坏后承载能力的减弱,是导致煤帮流变性显著的主要原因。在原支护的基础上,采用注浆锚索对窄煤柱进行了二次支护,巷道围岩得到有效控制,回采期间巷道断面满足生产要求。Because of the tension of mining-excavation relay, the working for track roadway of 103lower03 working face in Baodian Mine has driven along next goaf only remaining small coal pillar before goaf roof movement is stable after the stoping in last section was finished. Under unstable residual bearing pressure, roadway deformation happens during excavation and the rheo- logical property of sidewall is obvious during steady deformation period. According to the analy- sis, the decreased bearing capacity of the heavily-damaged narrow coal pillar has resulted in the obvious rheological behavior. Based on original support, the narrow coal pillar is supported secondly by using grouting anchor cable. Then the surrounding rock deformation is kept under control and the size of roadway section meets the production demands during coal extraction.

关 键 词：残余支承压力 沿空掘巷 巷道支护 注浆锚索 

分 类 号：TD353[矿业工程—矿井建设]