尾矿库三维渗流模拟及排渗设施对渗流场影响

Three Dimensional Seepage Simulation of Tailings Pond and the Influence of Drainage Facilities on Seepage Field

为分析排渗管和坝高对尾矿坝浸润线的影响程度,采用数值模拟方法对尾矿库不同工况下浸润线位置进行研究。采用Midas-GTS软件渗流分析模块对尾矿坝在增设排渗管前后、不同坝高、不同运行水位工况下渗流场分布进行数值模拟,计算得出不同工况下浸润线位置。结果表明:增设排渗管后,浸润线与实测浸润线耦合较好,相对误差在合理范围内;坝高100 m时,每隔7 m高程差布设排渗管的方案可有效控制坝体内浸润线的埋深和分布,防止发生渗透破坏,使尾矿库安全运行。本次研究考虑了尾矿库的复杂性及排渗管对渗流场的直接影响,为尾矿库三维渗流安全分析提供了一定的参考依据。

In order to analyze the influence of seepage discharge pipe and dam height on the phreatic line of tailings dam,the location of phreatic line under different working conditions of tailings pond is studied by numerical simulation method.The seepage analysis module of Midas-GTS software is used to simulate the seepage field distribution of tailings dam before and after adding seepage discharge pipe,under different dam heights and different operating water levels,and calculate the position of phreatic line under different working conditions.The results show that the coupling between the infiltration line and the measured infiltration line is good,and the relative error is within a reasonable range;When the dam height is 100 m,the scheme of arranging seepage discharge pipes every 7 m elevation difference can effectively control the position of the seepage surface of the tailings dam,significantly improve the state of the seepage field and make the tailings pond operate safely.This study considered the complexity of the tailings pond and the direct impact of the drainage pipe on the seepage field,and provided a certain reference basis for the three-dimensional seepage safety analysis of the tailings pond.