露天采场高陡岩质边坡流固耦合稳定性研究

Stability Research of the Fluid-solid Coupling of High and Steep Rock Slope

运用有限单元法,建立了平川铁矿露天采场高陡岩质边坡仿真模型。在分析了露天采场地下水渗流机理的基础上,建立了渗流场和应力场的两者耦合模型,对露天采场高陡岩质边坡进行了有限元二维渗流场-应力场耦合稳定性计算。采用强度折减法,对整个露天采场区域典型边坡剖面进行了稳定性分析,并给出了安全稳定系数。对有限单元法计算结果与极限平衡法计算结果进行了比较,两者计算出的边坡稳定性系数较为吻合,边坡破坏的剪出口是一致的,破坏曲线也较吻合。

The finite element method is adopted to build a simulation model of high and steep rock slope of open pit in Pingchuan Iron Ore.Based on the seepage mechanism analysis of groundwater at open pit,the coupling model of both seepage field and stress field is established,and the coupling stability of finite element two-dimensional slope seepage-stress field for high and steep rock slope at open pit is calculated,with the safety coefficients given.With the comparison of the results by the finite element method and the limit equilibrium method,it is found out that their safety coefficients are consistent,and the shear cracks caused by slope landslide are similar,and their destruction curves are coherent also.