Study on mechanism of seepage drainage facilities affecting saturated-unsaturated seepage flow field of high tailings dam

Abstract

This article uses a 300m complex high heap tailings dam as an example. Obtain real parameters through laboratory tests and in-situ tests. Establish a two-dimensional finite element numerical model. Consider normal and flood conditions. Consider the three stages of tailings dam height stacking to 135m, 200m and final 300m. two-dimensional finite element seepage field simulation of simultaneously setting dam surface drainage facilities and reservoir bottom drainage facilities, only reservoir bottom drainage facilities, and only dam surface drainage facilities was performed. Through the analysis of results, the bottom seepage drainage facility is not effective when the dam is high or there are complex geological conditions in the dam. The drainage facilities in front of the dam have a better effect on preventing the infiltration line from overflowing the dam surface, but the ability to control the infiltration line is weak.