小麦地尾矿库溃坝影响范围模拟分析

Simulation Analysis of the Influence Range of Dam Failure of Xiaomaidi Tailings Pond

为研究尾矿库三期加坝溃坝影响范围,考虑尾矿坝坝址所处地理位置、现状坝高稳定性、下游地形、设施以及暴雨等客观条件,建立溃坝模型,借助FLUENT流体计算软件,对溃坝影响范围进行模拟。结果表明:三期加坝方案可行,溃坝发生后下泄尾砂浆体主要沿库区下游的山体和沟谷方向演进,大量尾砂将堆积在下游的沟谷内;局部采取开挖泄砂沟道,确保不对半山坡的居民房屋造成冲击。

In order to study the influence range of dam-break in the third phase of the tailings dam,the dam-break model is established considering the objective conditions such as the geographical location of the tailings dam site,the stability of the current dam height,the downstream topography,facilities and rainstorm.The influence range of dam-break is simulated by FLUENT fluid calculation software.The re⁃sults show that the third-stage dam-adding scheme is feasible.After dam-break,the tail-discharge mortar body mainly evolves along the mountains and valleys in the downstream of the reservoir area,and a large number of tail sand will accumulate in the valleys in the downstream.Excavation of sand drains is adopted locally to ensure that there is no impact on residential houses on half-hill slopes.