精细地形下铀尾矿库溃坝三维数值模拟研究

Three Dimensional Numerical Simulation of Uranium Tailings Pond Dam Break With the Accurate Terrain

为研究铀尾矿库溃坝泥石流演进规律及其对下游环境的影响,基于VOF方法、RNG k-ε紊流模型,建立溃坝三维数值模型,利用水槽溃坝试验验证了数值模型的准确性;针对某铀尾矿库建立坝体三维模型及下游河道三维精细地形模型,采用计算流体力学软件Flow-3D对铀尾矿库局部溃坝进行三维数值模拟研究,得到溃坝泥石流流速、传播时间、泥石流深度等要素变化规律以及溃坝泥石流影响范围。模拟结果表明,尾矿库局部溃坝泥石流不会直接冲击尾矿库下游村庄。

In order to study the evolution law of debris flow of uranium tailings pond and its impact on downstream environment,a three dimensional numerical model of dam-break was established based on the VOF method and RNG κ-εturbulence model.The accuracy of the numerical model was verified by using the flume dam break model test.Afterwards,a three dimensional model of the tailings dam and three dimensional accurate terrain downstream were established for a uranium tailings pond.Three-dimensional numerical simulations of the partial dam-break of the uranium tailings pond were conducted using computational fluid dynamics software Flow-3D to obtain the flow velocity of the debris breaking,propagation time,depth of debris flow,as well as the impact range of dam-breaking debris flows.The results show that the partial dam-break debris in the tailings pond will not directly impact the downstream villages of the tailings pond.