内蒙古高家梁煤矿巷道加固及围岩支护结构的数值模拟分析

高家梁煤矿位于内蒙古鄂尔多斯市东胜区东南8km处,矿井设计规模年产600×104吨。建井期间在埋深50～150m的运输大巷中部,遇到一种低强度软岩,巷道掘进与施工过程中冒顶、塌方时有发生,常规锚杆支护失效,对施工安全和进度造成很大影响。基于巷道地质情况与软岩特征,根据巷道围岩松动圈理论及围岩与支护作用关系,重点分析了软岩巷道的变形、顶板失稳机理,确定了运输大巷的工程加固方法。经过ADINA数值模拟验算以及后期的运输大巷变形监测曲线都证明加固方案满足运输大巷对支护刚度和强度的要求,同时还将加固方案进行了经济评价,得出了这种加固方案对于高家梁矿的特殊软岩巷道段加固在技术上可行,经济上可以接受的结论。

Roadway reinforcement and numerical simulations analysis in Gaojianliang Coal Mine

Gaojialiang coal mine located in Erdos City,Inner Mongolia,8km southeast of Dongsheng District Office,the mine design the size of an annual output of 6 million tons.Well built during the depth of 50 ~ 150m of Transportation Roadway Central has encountered a low-intensity soft rock,tunnel excavation and the construction process,cave,cave-ins occur,conventional bolting failure,caused by the construction safety and progress of significant.Based on geological conditions and the roadway characteristics of soft rock,according to tunnel surrounding rock loose circle theory and the surrounding rock and supporting role in the relationship,this article analyzes the deformation mechanism of soft rock roadway,roof instability mechanism and conventional reinforcement methods,and identified the major transport Lane reinforcement method.After checking,as well as numerical ADINA late roadway deformation monitoring of the transport curves have proven to meet the transportation roadway reinforcement of the supporting stiffness and strength requirements,while also strengthening the economic evaluation of the program,come to such a reinforcement program for the Gao jialiang mine special reinforcement of soft rock roadway segment is technically feasible and economically acceptable conclusion.