随着筋材在细粒尾矿堆坝中广泛应用，坝高不断刷新，漫顶溃决等尾矿坝灾害风险也随之增大，严重威胁着矿山安全。目前对于加筋高堆细粒尾矿坝漫顶溃决破坏行为及宏细观力学触发机理还不清楚，基于此，项目采用实验研究、理论分析和数值模拟相结合的方法，对加筋高堆细粒尾矿坝漫顶侵蚀破坏启动机理、时空演化规律、致灾因子开展研究。通过研究，揭示漫顶溃决破坏过程筋带-尾砂-洪水宏细观力学耦合机制，建立加筋细粒尾砂启动方程；阐明坝体几何参数（粒径、坝高）、筋带密度、洪水流量等多因子耦合作用下漫顶溃决行为规律、破坏模式，建立漫顶溃决破坏行为预测模型；运用MIKE21泥沙动力学软件，嵌入加筋细粒尾砂启动方程，基于工程实例，开展漫顶破坏行为数值模拟研究，通过与工程实际结果对比，验证尾砂启动方程及漫顶溃决破坏行为预测数学模型的有效性。研究成果可以为加筋高堆细粒尾矿坝漫顶溃决破坏行为预测以及防灾减灾预案制定提供科学依据。

Along with the height of fine tailings dam increasing since the extensive utilization of reinforcement, the risk of flood overtopping and dam-break increase constantly and it severely threatens the safety of mining projects. However, It is not clear about the overtopping failure mode of reinforced fine grain tailings dam and its macro-micro mechanical properties between reinforcement, tailings and flood. Based on the point, the project plans to carry out the erosion mechanisms of fine tailings startup, the space-time evolution law of overtopping failure and the hazard factors through the methods of experiment investigation, theoretical analysis and numerical simulation. Based on the study, the macro-micro interaction of reinforcement, tailings and flood is revealed in overtopping failure process and an equation of the sediment start in overtopping process will be established. The overtopping failure process and failure mode of reinforced fine tailings dam under multi-variable (grain size, dam height, reinforcement, flood) coupling participation will be clarified, a mathematical model of the quantitative prediction of reinforced dam failure is proposed. Based on the project examples, the MIKE 21 software will be used to analyze the space-time evolution law and failure mode of reinforced fine tailings dam overtopping by embedded the equation of the sediment start, the equation of the sediment start and the mathematical model of the quantitative prediction of reinforced dam failure will be validated by the simulation analysis. The research could provide scientific basis and technology support for overtopping failure prediction of reinforced fine tailings dam.