【摘要】 针对南京市富源铁矿采空引起的地面塌陷问题,通过现场调查、工程地质勘探等方法查明采空塌陷区地质环境背景条件、矿体特征、开采状况以及地面塌陷灾害发育特征,分析采空塌陷的形成机理,利用通用离散单元法程序模拟采矿开挖对周边围岩、地面变形的影响,数据分析显示-20 m～+24 m矿体采空是诱发地面塌陷的主要原因,将危险区分为陷落区和开裂变形区,预测陷落区不稳定,有进一步整体塌陷的可能.更多还原

【Abstract】 To address the problem of ground subsidence caused by the mining of Fuyuan Iron Mine in Nanjing, on-site investigation and engineering geological exploration are applied to identify the geological environment background conditions of the mining subsidence area, ore body characteristics, mining conditions and the development characteristics of ground collapse disasters. The formation mechanism of goaf collapse is analyzed. UDEC is then used to simulate the influence of mining excavation on surrounding rock and ground deformation. The data analysis shows that-20 m～+24 m ore body mining is the main reason for induced ground collapse. The danger is divided into a subsidence zone and a cracking deformation zone, and that depression zone is predicted to be unstable, and there is a possibility of further overall collapse.更多还原