煤层底板破碎带区域注浆围岩稳定性分析  

Stability analysis of grouting surrounding rock in fracture zone in coal seam floor

作　　者：任波 余国峰[1,3] 牟文强 韩云春 李连崇 魏廷双[5] REN Bo;YU Guofeng;MU Wenqiang;HAN Yunchun;LI Lianchong;WEI Tingshuang(State Key Laboratory of Deep Coal Mining and Environmental Protection,National Engineering&Technology Academy for Coal Mining,Huainan 232000,China;School of Emergency Management and Safety Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;Ping’an Coal Mining Engineering Technology Research Institute Co.,Ltd.,Huainan 232000,China;School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China;Huainan Mining Group Zhangji Coal Mine,Huainan 232000,China)

机构地区：[1]煤炭开采国家工程技术研究院深部煤炭开采与环境保护国家重点实验室,安徽淮南232000 [2]中国矿业大学(北京)应急管理与安全工程学院,北京100083 [3]平安煤炭开采工程技术研究院有限责任公司,安徽淮南232000 [4]东北大学资源与土木工程学院,辽宁沈阳110819 [5]淮南矿业集团张集煤矿,安徽淮南232000

出　　处：《煤矿安全》2021年第10期171-176,共6页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51627804);安徽省科技重大专项资助项目(17030901023)。

摘　　要：受地质隐蔽性、复杂性影响,裂隙存在注浆不到位而开采诱发二次破坏的安全风险。以张集矿1612A工作面邻近导水破碎带注浆底板为背景,基于所提出的数值模拟与微震监测结合的分析方法,研究了破碎带注浆治理效果,揭示了注浆前后采动应力影响及注浆岩体的稳定性。结果表明:相比较未注浆时,注浆围岩的应力异常区域减小,不再发生耦合贯通至工作面;应力在距巷帮约10 m后随距离增大扰动程度减小。微震监测同时验证了计算结果:岩石破裂信号在注浆波及区发生"绕路"现象,注浆区域微震事件数量较少,注浆岩体处于稳定状态。Affected by the geological concealment and complexity, there is a potential safety risk of mining induced damage due to insufficient grouting in fissures. Based on the analysis method of combining numerical simulation and microseismic monitoring, the grouting treatment effect of water conducting channel is analyzed based on the background of the grouting floor of 1612A working face in Zhangji Coal Mine. The influence of mining stress and the stability of grouting rock mass are revealed before and after grouting. The results show that: compared with the non-grouting, the abnormal stress area of surrounding rock decreases. The coupling is no longer connected to the working face. After 10 m away from the roadway side, the disturbance degree decreases with the increase of distance. Microseismic monitoring further verified the calculation results: the rock fracture signal "detours"in the grouting affected area. The number of microseismic events in surrounding rock area is small, and the grouted rock mass is in stable state.

关 键 词：煤层底板 破碎带 注浆岩体 数值计算 微震监测 

分 类 号：TD745.26[矿业工程—矿井通风与安全]