云南某尾矿库溃坝砂流流态研究

Study on tailings sand flow pattern about a tailings dam failure in Yunnan Province

尾矿库一旦发生溃坝,库内水和尾砂结合在一起以泥石流的形式涌出,会危及下游人民的生命安全。根据现有的水力学公式对尾矿库溃坝砂流运动形态进行理论计算,根据计算所得结果绘制出溃坝时不同溃坝高度及溃口宽度与尾砂最大流量、到达下游各断面的淹没深度、到达时间、最大流速以及冲击力的关系曲线,并进行分析,为尾矿库管理以及溃坝预防提供依据。

Once the dam failure occurs, water and tailings sand will mix together and pour out as the form of debris flow, which endangers the lives of downstream people and causing huge property damage. A theoretical calculation of the movement patterns about tailings dam break flow is made based on the existing hydraulics formula. According to the calculated results, under different heights and different widths conditions, the relationship curves about the tailings maximum flow, the tailings sand depth of each downstream cross section, arrival time, the veloci- ty of the maximum tailings flow as well as the impact force are drawn. The analysis is also presented, which pro- vides a basis for tailing dam management and dam failure prevention.