某尾矿坝子坝稳定性及加固效果分析

以某尾矿坝为工程背景,根据现场工程地质勘探所获得地质资料及拟加高扩容初步设计资料等,建立三维尾矿坝的数值仿真模型。在此基础上,针对最终设计坝顶标高+260 m(高160 m)情况采用FLAC3D软件中强度折减法求解了坝体子坝边坡安全系数,并确定了潜在滑裂面的位置。根据潜在滑裂面的位置选择土工格栅加固子坝,并通过对加固前后位移场、应力场以及剪切应变增量区的对比分析,表明所采取的加固措施是可行的。

Research on Stability Analysis and Reinforcement Measures of One Tailings Dam

Taking one tailing dam as the engineering background ,a three-dimensional numerical simulation model of the tailings dam is established based on the geological data obtained from the field engineering geological survey and heightening and expanding capacity preliminary design data .On this basis ,the sub-dams slope safety factor has been solved by the strength reduction FEM in FLAC3D on account of final design crest level +260 m (160 m in height) ,and the potential slip surface has also been determined .According to the position slip ,the geogrid reinforcement measure has been designed . Based on the contrastive analysis of displacement field ,stress field and the shear stress increment area before and after rein-forcement ,the reinforcement measures are proved to be feasible .