基于颗粒流数值模拟的尾矿坝稳定分析

Stability Analysis of Tailings Dam Based on Numerical Simulation of Granular Flow

尾矿坝运行状态严重影响矿区安全与下游人民生命财产,对其稳定性进行定量分析至关重要。通过颗粒流模拟双轴试验,完成对构成尾矿坝土体细观力学参数和宏观力学行为匹配研究,在此基础上,建立尾矿坝稳定分析颗粒流数值模型。借助强度折减法和增加重力法分别得到尾矿坝稳定安全系数为2.1和2.3,均高于规范抗滑稳定最小安全系数1.15,判定该尾矿坝处于稳定状态。

It is very important to conduct the quantitative analysisontailings dam stability for mining safety and peopleg life and property around downstream. The matching study between tailings dam mesoscopic mechanics parameters of soil and macroscopic mechanical be- havior by particle flow simulation biaxial test. The numerical simulation of granular flow is established on this basis. The tailings dam stability safety factorcalculated respectively with strength subtraction and increase the gravity method are 2. land 2.3, and they are higher than the standard minimum safety factor of stability against sliding, so the tailings dam is in a stable state.