基于FLAC^(3D)尾矿坝几何尺寸对渗流场的影响分析

Analysis of Effects of Tailings Dam Geometry Size on Seepage Field Based on FLAC^(3D)

针对尾矿坝几何尺寸对渗流场的影响,基于FLAC^(3D)显式有限差分法对不同尾矿堆坝坝高、尾矿砂分层线及初期坝坝高等17种不同工况对坝体内浸润线的影响作了系统的分析。结果表明:尾矿堆坝坝高对坝体上游浸润线影响不明显,对坝体下游浸润线的位置影响较大,在尾矿坝运行中后期,随堆坝高度的增加尾矿砂分层线对坝体下游浸润线的位置影响较大,所以合理的放矿工艺可以有效降低浸润线的高度;随着初期坝的升高,浸润线在初期坝上游坡面的逸出点逐渐降低,且浸润线在坝坡处的最小埋置深度逐渐增大,其计算结果可为初期坝的设计提供参考依据。

In view of the effects of tailings dam geometry size on seepage field,based on the explicit finite difference method FLAC3D,it is analyzed the effects of17different working conditions on dam body seepage line,such as different height of tailings dam,tail sand stratification line,the high dam of initial dam and so on.Results show that the increase of dam height affects the tailings dam upstream saturation line not so obviously,but greatly affects the downstream dam saturation line position.In the middle and later periods of the tailings dam running,with the increase of dam height tail,the sand stratification line greatly affects the location of the downstream dam saturation line,so reasonable ore technology can effectively reduce the height of the seepage line.With the increase of initial dam,the escape point of seepage line on early dam slope surface is gradually reduced,the minimum depth of embedment of the saturation line in the dam slope is gradually increased,and the calculation results can provide references for the design of the initial dam.