煤矿大变形软岩巷道联合支护方案研究  

Study on the combined support scheme of a largely deformed soft roadway in coal mine

作　　者：王李强 Wang Liqiang(Dongqu coal mine of Xishan coal electricity group co.LTD,Shanxi Taiyuan 030000)

机构地区：[1]山西焦煤集团西山煤电东曲煤矿,山西太原030000

出　　处：《煤矿现代化》2019年第1期105-107,共3页Coal Mine Modernization

摘　　要：以大变形软岩巷道为研究对象,通过分析巷道破坏关键部位和岩体结构面信息,提出注浆锚杆+锚索+底角锚杆联合支护方案并利用离散元程序对无支护、常规支护和联合支护状态下的巷道变形特征进行分析,结果显示:联合支护的软岩巷道未产生张拉破坏区和剪切破坏区,巷道保持稳定。顶底板岩体稳定,整体巷道支护效果良好。巷道开挖后围岩累积变形量小于0.15cm。软岩巷道可以维持较长时间稳定,为采矿作业提供了安全的环境。Take a largely deformed soft roadway in coal mine as the research object,through the analysis of destruction critical part of roadway and the surface of the rock mass structure information,the combined support plan of grouting anchor+anchor cable+base anchor was put forward and the discrete element program was used to analyse the deformation characteristics of three cases,the results showed that the tensile damage zone and shear failure zone were induced with the combined supporting,the roadway remained stable.The rock mass of roof and floor were stable and the supporting effect of the whole roadway was good.The accumulated deformation of surrounding rock after roadway excavation was less than 0.15cm.Soft rock roadway could be stable for a long time,and the combined support scheme provided a safe environment for mining operations..

关 键 词：大变形软岩巷道 联合支护 底角锚杆 离散元程序 

分 类 号：TD353[矿业工程—矿井建设]