金山店铁矿东区崩落法开采岩层移动变形规律研究

根据金山店铁矿东区工程地质特点和开采技术条件,在空间几何形态和力学性态上,建立了具有较高仿真度的三维数值分析模型。利用西采区地下开采地表监测数据反演出矿岩体力学参数,以此对东区数值分析模型的矿岩和结构面力学参数进行赋值。分别按地下开采没有冒通地表和冒通地表2种模式计算了8个方案,预测了岩层移动角随开采深度的变化趋势,为土地征购和房屋搬迁提供了重要的依据。

Investigation on Moving & Deformation Principle of Stratum with Caving in Eastern zone of Jinshandian Iron Mine

3-D numerical analysis model with high-level fidelity was built according to the geological and operational conditions of the eastern zone of Jinshandian Iron Mine on the basis of its spatial geometry and mechanical property. Rock mechanical parameters were deduced according to the monitored data of underground mining in this western mine zone and introduced into the mechanical parameters of rocks and structural plane for the numerical analysis model of the eastern zone. Eight patterns was simulated in total-caving-in and no-total-caving-in situations separately, to predict the changing trend of stratum moving angle with excavation depth, and the results provided the significant evidence for the land-purchasing and house relocation.