尾矿库溃坝对公路路基冲击破坏计算分析

Calculation and Analysis of Impact Damage of the Tailings Dam Break on Highway Subgrade

通过建立平面二维水动力模块对尾矿库溃坝进行数值模拟,得出溃坝影响区域内的尾砂淹没范围、淹没深度及演进过程等。在此基础上,计算尾矿库溃坝后尾砂是否淹没下游高速公路路基,并对路基的稳定性和抗倾覆能力进行了验算。结果表明:恒鑫尾矿库在最不利条件下发生溃坝时,高速公路路基整体稳定性满足要求,泥石流不会侵害路面,且不会对下游造成影响,该尾矿库可继续生产但需加强监测。

Through the establishment of two-dimensional hydrodynamic module that simulated the tailings dam break,the inundation range,submerged depth and evolution process of tailings in the dam break affected area were obtained.On this basis,the calculation whether the Hengxin tailings inundated the subgrade of the downstream expressway after the tailings dam break was conducted,and the stability and anti-overturning capacity of the subgrade were checked.The results show that,under the least favorable conditions,the overall stability of expressway subgrade meets the requirements,the road will not damaged by the debris flow,and the downstream will not affected.The production of tailings pond can continue,but it need to strengthen monitoring.