齐大山露天铁矿边坡开挖稳定性分析

Stability analysis of slope excavation in Qidashan Open-pit Iron Mine

基于FLAC3D6.0有限差分软件实现了对露天铁矿高边坡模型在开挖条件下的稳定性计算,分析了开挖前后边坡位移、最大剪应变增量变化情况;利用slide软件进行了边坡稳定性极限平衡分析,得到不同计算方法下边坡的安全系数。不同软件的计算结果表明:开挖条件下边坡整体稳定性降低,安全储备降低。计算结果给边坡治理提供了依据,有效避免了安全事故的发生。

Based on FLAC 3D 6.0 finite difference software,the stability calculation of open-pit iron mine high slope model under excavation conditions is realized.The article analyzes the changes of slope displacement and maximum shear strain increment before and after excavation.We carry out slope stability limit equilibrium analysis by using slide software,and obtain the safety factor of the slope under different calculation methods.The calculation results of different software also show that the overall stability of the slope is reduced and the safety reserve is reduced under the excavation condition.The calculation results provide a basis for slope treatment,effectively avoiding safety accidents and economic losses.