龙都尾矿库地下渗流场的数值模拟分析

利用2D-FLOW计算软件,对龙都尾矿库在不同条件下的渗流进行了模拟计算。其中,初期坝按透水和堵塞两种情况,干滩面长度分100,200,300 m三种情况考虑;同时,首次考虑了大气降雨对尾矿坝渗流场的影响,分别计算了50,100,200 mm/d三种雨型。通过计算,获得了龙都尾矿库在不同条件下地下渗流的变化规律。从计算结果中发现,如果初期坝被堵塞,则坝体浸润线会抬高,与尾矿堆积坝坝面相交,并从坝面溢出,对坝体的稳定性产生不利影响;干滩面距离的长短对坝体浸润线有影响,但均不会与堆积坝坝面相交,不会从坝面溢出;大气降雨对坝体的渗流影响较大,从模拟计算中可以看出,大气降雨越大,浸润线抬升越高,对坝体的稳定越不利。

Numerical simulation analysis about seepage field of Longdu tail bay

By using 2D-FLOW program, the numerical calculation analysis about a seepage field of Longdu tailings pool under different condition was made, which included a first dam stoppage and penetration and a dry slopes length that was 100m and 200m and 300m each, and the influence to the seepage field about rainfall which was 50mm/d and 100mm/d and 200mm/d each and every was considered first time. Through calculation, the change rule of the seepage field was found, if the first dam was jamed, the saturation line was up and the tailings dam safety was threatened, the dry slope length had a little influence to the saturation line, but the rainfall had much more, the higher the saturation line, the more dangerous to the tailings dam.