关键词: 尾矿库, FLOW-3D, 溃坝, 真实地形, 数值模拟

Abstract: In order to study the influence of tailings flow caused by dam break on downstream sensitive targets,a real three-dimensional terrain numerical model was established for a overhead tailings pond in Jiangxi Province. The FLOW-3D three-dimensional hydrodynamics software was used to simulate the temporal and spatial changes of tailings flow in the downstream 1km range under different working conditions. The results show that:the development direction,distribution,water depth and sediment deposition of dam break tailings flow are obviously affected by the real three-dimensional terrain changes. The dam break tailings flow mainly distributes in the downstream paddy fields and low-lying areas. As the main flood passage, Qianxi River has obvious water depth changes and sediment deposition. Only the removed Qianxi Village is submerged by the tailings flow,as far as the fish pond in the west of Gangkou Village,the other villages were not affected. The results can provide the basis for the safe operation management of tailings pond and the formulation of dam break emergency plan.

Key words: tailings pond,FLOW-3D,dam break,real terrain,numerical simulation