广东连平县大尖山铅锌矿现状尾矿坝安全与稳定性分析研究

Safety and stability analysis of tailings dam of Dajianshan Lead-Zinc Mine in Lianping County,Guangdong Province

本文从尾矿库的安全现状出发,结合广东连平县大尖山1#尾矿库、2#尾矿库现状,研究了尾矿库注销前的坝高及库容、现状尾矿坝稳定安全等内容。重点分析了影响大尖山1#尾矿库、2#尾矿库稳定性的安全系数,并采用瑞典圆弧法进行滑动面计算,具体计算时采用了计算程序在电脑上完成计算和成图。确定了土层物理力学参数,得出了稳定性计算模型和结果,分析了安全系数与稳定性系数。通过计算结果可知,现状尾矿库坝体在正常水位和洪水位工况下,其稳定性安全系数能满足规范要求,坝体稳定。连平县大尖山铅锌矿1#尾矿库、2#尾矿库为正常库。但是,为了达到销库安全标准,需采取一定的加强截排水的措施。

Based on the safety status of tailings ponds,combined with the status quo of Dajianshan 1#and 2#tailings ponds in Lianping County,Guangdong Province,this paper studies the dam height and storage capacity of tailings ponds before the cancellation,and the stability and safety of tailings dams.The safety factor affecting the stability of Dajianshan 1#and 2#tailings ponds is analyzed,and the sliding surface is calculated by Swedish arc method.The physical and mechanical parameters of soil layer are determined,the stability calculation model and results are obtained,and the safety coefficient and stability coefficient are analyzed.It can be seen from the calculation results that the stability safety factor of the dam body of the tailings pond can meet the requirements of the code and the dam body is stable under the conditions of normal and flood water levels.The 1#and 2#tailings ponds of Dajianshan Lead-Zinc Mine in Lianping County are normal.However,in order to meet the safety standards of the warehouse,some measures should be taken to strengthen the interception and drainage.