淋滤固结对尾矿砂土作用试验分析

Experimental analysis of leaching consolidation on tailings sand

以云南卡房尾矿库为背景,采用单一变量原则,通过淋滤试验,对淋滤过程中淋滤时间,淋滤量以及淋滤液成分控制分析,研究淋滤固结对尾矿砂土固结的影响,得出:在一定范围,尾矿砂土的淋滤固结程度及其抗剪强度指标与淋滤时间及淋滤流量呈正相关,与淋滤液的化学成分也存在一定关系;自重固结作用下的最终沉降量远小于淋滤固结作用下的沉降量,尾粉砂前者沉降量较后者小近80%,尾粉土前者沉降量较后者小约83%,尾粉砂前者的黏聚力、内摩擦角值较后者分别小约37.8%、15.1%,尾粉土前者的黏聚力及内摩擦角值较后者分别小约29.8%、4.8%。

This study aimed to find the effect of leaching consolidation on consolidation of tailings sand.The single-variable principle is applied to the leaching test based on the background of Yunnan Kafang tailings reservoir.According to the analysis of control leaching time,leaching amount and leachate composition,the following conclusions were obtained:within a certain range,the leaching consolidation degree and shear strength index of tailings sand are positively correlated with leaching time and leaching flow,and also have a certain relationship with the chemical composition of leaching filtrate;The final settlement under self-heavy consolidation is much smaller than that under leaching consolidation.The settlement of the former silt is nearly 80%smaller than that of the latter,and the settlement of the former silt is about 83%smaller than the latter.The cohesive force and the internal friction angle of the former are about 37.8%and 15.1%,respectively,and the cohesive force and the internal friction angle of the former powdery soil are about 29.8%smaller than the latter.4.8%.