地下水对巷道围岩稳定性影响的数值模拟  

Numerical Simulation of the Influence of Groundwater on Roadway Wall Rock Stability

作　　者：李玉杰[1,2] 王连国[1,2] 陆银龙[1,2] 孙琎[1,2] 

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221008 [2]中国矿业大学力学与建筑工程学院,江苏徐州221008

出　　处：《徐州工程学院学报（自然科学版）》2011年第1期34-39,共6页Journal of Xuzhou Institute of Technology(Natural Sciences Edition)

基　　金：国家重点基础研究发展计划项目(2010CB226805);国家自然科学基金项目(50874103);江苏省自然科学基金项目(BK2008135);国家重点实验室开放基金项目(SKLGDUEK0905)

摘　　要：为探明地下水对巷道围岩稳定性的影响,结合工程实际情况分析地下水对巷道围岩的弱化作用;建立围岩强度与饱和率之间的关系,用FISH语言将该关系嵌入到FLAC流固耦合模块中,从而建立具有遇水弱化效应的巷道围岩稳定性数值计算模型.研究结果表明:在锚杆支护条件下,有水作用时巷道围岩变形明显增大,与实际淋水条件下巷道围岩变形破坏情况是一致的;在锚杆支护基础上进行全断面锚注支护可有效控制地下水影响下巷道围岩的变形.工程实践验证了数值模拟的准确性与锚注支护对于有地下水影响的巷道支护的适用性.To explore the groundwater＇s impact on roadway wall rock stability, this paper, combining practical engineering cases, analyzed the weakening effect of the water on the roadway wall rock, established the relationship between roadway wall rock strength and its saturation rate and embedded it into FLAC FSI module with FISH language, and established the roadway wall rock stability numerical model with water weakening effect. The results show that in bolting, the deformation of the roadway gets larger when the impact of water was considered than not considered, which is the same with the actual conditions of the deformation and failure, the whole sectional bolt-grouting support on the basis of bolting can effectively control the deformation of the roadway wall rock influenced by the groundwater. Engineering application verifies the accuracy of the numerical simulation and the applicability of bolt-grouting support to the roadway influenced by the groundwater.

关 键 词：地下水 遇水弱化效应 流固耦合 锚注支护 

分 类 号：TD353[矿业工程—矿井建设]