基于概率积分法和数值模拟的某铁矿地表沉降影响研究

Research on Surface Settlement Impact of a Certain Iron Mine Based on Probability Integration Method and Numerical Simulation

为了研究安徽某铁矿地下开采对地表沉降的影响情况,以该地下铁矿山工程地质条件为基础资料,运用概率积分法和Matlab计算地下矿山开采引起地表沉降数值范围,用FLAC^(3D)构建地下矿山虚拟仿真模型,进行整个矿区的矿石历史和未来开挖充填全过程模拟。研究结果表明:地表倾斜、曲率、水平变形最大值分别为1.8 mm/m、0.019mm/m^(2)、1.94mm/m,均低于地表建筑物保护等级安全阈值。研究结果可为矿区保障地表建筑物安全和沉降监测系统设计提供理论和技术支撑。

In order to study the impact of underground mining on surface subsidence in a certain iron mine in Anhui Province,based on the engineering geological conditions of the mine,the probability integration method and Matlab were used to calculate the numerical range of surface subsidence caused by underground mining.A virtual simulation model of the underground mine was constructed using FLAC^(3D)to simulate the entire mining area's ore history and future excavation and filling process.The research results indicate that the maximum values of surface tilt,curvature,and horizontal deformation are 1.8mm/m,0.019mm/m^(2),and 1.94mm/m,respectively,which are all below the safety threshold of surface building protection level.The research results can provide theoretical and technical support for ensuring the safety of surface buildings and designing settlement monitoring systems in mining areas.