复合采动下边坡岩体滑移规律及其数值分析

Numerical Value Analysis of Slope Rock Mass Deformation Mechanism under Combined Mining Influence

在数值分析与实际变形分析的基础上，探讨复合开采影响下岩体内部的应力变化特点．由于在地下与露天复合开采作用下，岩体变形的叠加作用机制与变化特征取决于2种采矿的各自开挖量；当边坡角较小时，岩体变形更多地表现出地下采动特性，而在相同地下采动影响下，随着露天边坡角增大，其相应的变形范围和变形深度均增大；2种开挖量大小直接影响各单元体主应力矢量大小和方向，并且其中每个开挖量的变化都将使岩体产生不同的破坏特点和滑移机制．

The change behavior of inner rock mass for combined mining on the basis of analysis of numerical value and actual deformation is explored. Because of effect under combined underground and open pit mining, mechanism about superimposition of deformation and change behavior depends on respectively amount of both mining methods. Deformation of rock mass would more present behavior of underground mining as slope dip angle is small. Therefore, under influence of the same amount in underground excavation, the range and depth of slope deformation are increased as slope dip angle is increased. Both amount of excavation directly influences quantity value and direction of vector. Change of each amount of excavation would make the different behavior of failure and moving mechanism for rock mass is produced.