露转地逆倾分步开采对含断层高陡边坡稳定性的影响

以攀枝花某钒钛磁铁矿高陡边坡为工程背景,对逆倾分步开挖条件下含有断层边坡的稳定性问题进行了研究.通过现场踏勘、工程地质钻探方法,初步掌握岩层及断层分布情况,通过对现场钻孔岩块样品的测试,获取了岩层物理力学参数.在此基础上,运用FLAG3D软件数值模拟了有断层存在的情况下露天转地下逆倾分步开采对露天高陡边坡稳定性的影响,得出了该矿区露转地边坡内部应力及位移分布特征和边坡变形及破坏规律,揭示了F316、F317断层对边坡滑移模式与稳定性的影响,对于采矿安全和提前预警有重要意义,同时为正确确定合理开采方案和制定合理的安全治理技术措施提供了依据.

Influence of step-by-step excavation from open-pit to underground with reverse tendency on stability of high and steep slopes with faults

Taking the high and steep slope of a vanadium-titanium magnetite in Panzhihua as the engineering background, through on-site surveys and engineering geological drilling methods, the distribution of rock formations and faults was initially grasped, and physical and mechanical parameters of the rock formations were obtained by testing on-site drilling rock samples. On this basis, the FLAC3D software was used to numerically simulate the influence of open-pit to underground reverse-dip stepwise mining on the stability of open-pit high and steep slopes in the presence of faults, and the internal stress and displacement of the open-pit slope in the mining area were obtained. The distribution characteristics and the laws of slope deformation and failure reveal the influence of the F316 and F317 faults on the slip mode and stability of the slope, which is of great significance for mining safety and early warning, and at the same time for the correct determination of a reasonable mining plan and a reasonable safety Technical measures for governance provide a basis.