为了解AMD蚀化作用下,边坡岩体位移及应力变化规律,根据现场节理调查,结合三维离散元数值模拟技术,建立某硫铁矿边坡三维数值模型,对边坡岩体进行监控分析.研究结果表明:AMD蚀化到达一定程度后,边坡才开始发生变形移动,其中竖直方向变形最大;最大主应力、最小主应力随着AMD蚀化的进行逐渐增大,且应力场与位移场变化表现出一致性,验证了该蚀化模型的正确性,为矿体边坡的稳定性分析预测提供较有效的解决方法. In order to understand the regularity of displacement and stress variation of slope rock mass under AMD erosion, according to the field joint investigation and 3D numerical simulation of discrete element method, a three-dimensional numerical model of a pyrite slope was established and the slope rock mass was monitored and analyzed The results show that the deformation of the slope begins to occur when the degree of AMD etching reaches a certain level, of which the deformation in the vertical direction is the largest. The maximum principal stress and the minimum principal stress gradually increase with the AMD erosion, and the stress field The change of displacement field showed consistency, verified the correctness of the model and provided an effective solution to the stability analysis and prediction of ore body slope.