基于现场监测与数值模拟结合的采动诱发围岩失稳与地表沉降研究  

Mining-Induced Surrounding Rock Instability and Surface Subsidence Based on Combination of In-situ Monitoring and Numerical Modelling

作　　者：王雨萌 关凯[1] 朱万成[1] 刘洪磊[1] WANG Yu-meng;GUAN Kai;ZHU Wan-cheng;LIU Hong-lei(School of Resources&Civil Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2024年第2期234-243,共10页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(U1906208,52004053).

摘　　要：基于3Dmine与无人机倾斜摄影技术建立集成真实地表地貌、矿体及巷道的三维地质模型,结合Rhino6-FLAC3D建立矿体回采数值计算模型,对浅部岩层移动和地表变形的影响进行模拟分析,结合InSAR地表变形监测数据对模拟结果的有效性进行对比验证。结果表明:模拟结果与InSAR地表变形监测数据具有较好的一致性,表明基于多手段的数值建模计算与现场监测数据相结合的分析方法的有效性;对空场采矿法残留的采空区采用废石充填能够在有效控制空区围岩塑性区发展基础上维持充填体稳定性;矿区深部矿体的回采与充填可能对浅部已充填采场围岩的稳定性产生一定影响,浅部已充填采场受扰动严重程度与深部作业区域距离呈负相关;由InSAR监测数据和数值模拟结果可知,深部矿体回采扰动和浅部空区二次破坏对地表沉降影响较小.A three-dimensional geological model integrating real ground topography,ore bodies,and tunnels was established by 3Dmine and UAV.Combined with Rhino6-FLAC3D,a numerical calculation model for ore body extraction was developed.The impact of rock movement and surface deformation was simulated and analyzed.The effectiveness of simulation results was verified through InSAR monitoring.The results indicate that the simulation results are consistent with InSAR monitoring,indicating that the research method combining monitoring and simulation is effective.For the goaf left by open-pit mining,dry filling can limit the damage of surrounding rock and filling body.The stability of shallow filled mining areas might be affected by deep operations in the mining area,and there is a negative correlation between the severity of disturbance and the distance from deep work areas.According to InSAR monitoring and numerical simulation,the impact of goaf destruction and mining disturbance on the surface subsidence is weak.

关 键 词：地表变形 采空区 数值模拟 充填体 InSAR监测 

分 类 号：TD853[矿业工程—金属矿开采]