基于离散元的西南某露天矿岩质高边坡稳定性分析

Stability Analysis of an Open-pit High Slope in Southwest China Based on Discrete Element

西南某露天铁矿开采形成了高陡边坡,边坡坡体中有不同构造的断层相互切割,节理较为发育,同时受软弱结构面影响比较明显。采用离散元法对高陡边坡稳定性进行计算,分析边坡在天然状态及开挖后的稳定性情况。模拟结果表明,由于受优势节理面控制,边坡坡脚处容易向临空面产生较大位移,可能发生浅表层局部失稳,整体稳定性较好。同时,也体现了离散元法在解决节理岩质边坡稳定性问题上具有较强适用性和优越性。

A high and steep slope is formed in an open-pit iron mine in southwest China,slope in the body have different structure of fault interaction cutting,joint development,at the same time affected by weak structure plane.The stability of high and steep slope is calculated and analyzed by using the discrete element method.The stability state of the slope in natural state and the deformation characteristics after excavation are simulated.The simulation results show that due to the dominant joint surface control,the foot of slope is easy to produce large displacement to the open surface,which may lead to local instability in the shallow layer and good overall stability.At the same time,it also shows that the discrete element method has strong applicability and superiority in solving the stability problem of jointed rock slope.