煤巷掘进过断层应力变化规律数值模拟研究  

Numerical Simulation of Stress Distribution of Coal Roadway Passing through Faults

作　　者：李德行[1,2] 王恩元[1,2] 李忠辉[1,2] 沈荣喜[1,2] 孔祥国[1,2] 刘泉霖 

机构地区：[1]中国矿业大学煤矿瓦斯与火灾防治教育部重点实验室,江苏徐州221116 [2]中国矿业大学安全工程学院,江苏徐州221116

出　　处：《煤炭技术》2016年第8期58-60,共3页Coal Technology

基　　金：教育部科学技术研究项目资助(113031A);中央高校基本科研业务费专项资金资助(2014ZDPY23);中国矿业大学第七批优秀创新团队建设基金项目(2014ZY001)

摘　　要：以钱家营煤矿5~#煤层巷道掘进过AF_(41)和AF_(42)逆断层为例,采用FLAC^(3D)模拟了巷道掘进围岩应力分布及变化规律。结果表明:断层附近煤岩体初始垂直应力较大,构造应力影响范围为30 m;随着巷道掘进,断层附近围岩应力逐渐增大,应力集中程度更加显著;对于逆断层而言,沿断层下盘向断层掘进更容易导致应力集中,将更容易引起冲击地压。研究结果将为有断层赋存的复杂地质环境中巷道支护和安全掘进提供理论指导。By FLAC3D, the stress distribution of surrounding rock was studied on tunnel excavation across the AF41 and AF42 reverse faults in 5# coal seam of Qianjiaying colliery. The results show that the initial vertical stress of coal and rock near the faults is larger and the tectonic influence scope is about 30 m. With the excavation of roadway, the stress of surrounding rock near faults is increasing gradually and stress concentration degree is more significant. To reversed faults, the excavation along the footwall of faults is easier to cause stress concentration and research results will provide theoretical guidance for geological environment with faults. will be more likely to induce rock burst. The tunnel support and safe excavation in complex

关 键 词：煤巷掘进 断层 应力集中 冲击地压 数值模拟 

分 类 号：TD322[矿业工程—矿井建设]