基于FLO^(2D)与3DMine耦合的尾矿库溃坝灾害模拟

Simulation of Tailings Dam Failure Disaster Based on Coupled FLO^(2D) and 3DMine

为预测和评价尾矿库溃坝的致灾情况,提高库区防灾减灾能力,建立尾矿库溃坝数值仿真模型。采用FLO2D泥石流模拟软件对湖南某尾矿库进行溃坝灾害过程仿真,并将模拟结果与3DMine数字矿山软件耦合,实时反演溃坝灾害过程。分析结果表明,该尾矿库溃坝时的最大溃决流速为40.2 m/s,下游沟谷最大淹没深度达13.6 m,溃坝瞬时最大冲击应力达100 MPa。三维动态反演了尾矿库溃坝前稳定状态、溃坝后0.01,0.02和0.05 h的尾砂流动状态和淹没范围。根据溃坝泥砂流动强度,对该尾矿库全部溃坝和半溃坝时的灾害程度进行三色图判别。

In order to evaluate and predict the hazard of dam break, and strengthen the capacity to prevent and mitigate the disaster, a numerical simulation model for dam failure was built. Based on the debris flow software FLO^2D, the disaster of a certain tailings pond dam break was studied. And coupled with a digital mining software 3DMine, real-time evolution process of the dam break was simulated. The results show that the greatest outburst flow velocity of the tailings from dam is 40.2 m/s, that the maximum depth of submerged area is 13.6 m, and that the largest instantaneous impact force of dam failure is 100 MPa. The tailings flow state and submerged area of the steady state before the dam break, and 0.01 h, 0.02 h and 0. 05 h after dam failure were three-dimensionally and dynamically presented. According to the flow strength of the dam failure sediment, a three-color graph was drew to distinguish the disaster levels of whole failure and semi-failure of the tailings dam.