Since the tailing dam fails catastrophically with substantial instantaneous deformation, it is difficult to measure the migration of debris flow caused by the failure of the tailings dam. A simulation model of tailing debris flow based on Smoothed Particle Hydrodynamics (SPH) theory of elastic-plastic constitutive equation has been established by considering the viscoplasticity of mud and the elastic-plastic characteristics of tailing sand to investigate the impact effect of tailing flow on the downstream structures. By comparing the experimental and two different simulation results obtained, it can be concluded that SPH elastic-plastic constitutive model can effectively simulate the accumulation and migration processes of the tailing debris flow, which indicates that the SPH model has good applicability to solve geotechnical large deformation problems of similar tailings flow slide. Then, the verified simulation model developed based on a series of simulations of tailing debris flow propagations was used to determine the momentum reduction on the downstream structure resulting from the presence of a simple checking dam perpendicular to the direction of propagation and to determine the characteristics of stresses applied to this structure in terms of peak impact force and evolution over time to the main flow direction.

中文翻译：

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尾矿泥石流影响结构的SPH模拟及其在检坝缓冲效果分析中的应用。

由于尾矿坝由于重大的瞬时变形而发生灾难性的破坏，因此很难测量由尾矿坝的破坏引起的泥石流的迁移。结合泥浆的黏塑性和尾矿砂的弹塑性特征，建立了基于弹塑性本构方程的光滑颗粒流体动力学理论的尾矿泥石流模拟模型，研究了尾矿流对泥石流的影响。下游结构。通过比较实验结果和两种不同的模拟结果，可以得出结论，SPH弹塑性本构模型可以有效地模拟尾矿泥石流的堆积和运移过程，这说明SPH模型具有很好的适用性，可以解决类似尾矿滑坡的岩土大变形问题。然后，基于一系列尾矿泥石流传播模拟而开发的经过验证的模拟模型用于确定下游结构的动量减小，该下游动因是由于存在一个垂直于传播方向的简单检查坝而引起的，并确定了特征。就峰值冲击力和随时间向主流动方向的演变而言，施加于此结构的应力。