闭库尾矿库地下水污染防控措施

Prevention Measures of Groundwater Pollution in a Closed Tailing Reservoir

由于有色金属尾矿库占地面积、尾矿堆存量一般较大,服务期满如果没有按照设计要求闭库,尾矿库承载的尾矿浸出液中含有的污染因子可能渗漏污染区域地下水。本文以某金矿闭库尾矿库为例,根据尾矿库环境现状调查、区域水文地质资料,查明尾矿库周边地下水污染状况,提出采取库面多层阻隔、完善库区雨洪水导排系统和新建地下水垂直防渗墙的地下水污染防控措施,实现对地下水污染源的源头和污染羽控制。

The non-ferrous metal tailing reservoir covers a large area and the storage of tailings is large, if the tailing reservoir is not closed according to the design requirements when service ending period, the pollution factors contained in the tailings leaching solution carried by the tailings reservoir may polluted the regional groundwater. In this paper, we take a closed tailing reservoir of gold mine as an example, according to the environmental status survey and regional hydrogeological data to find out the groundwater pollution around the tailings pond, put forward the prevention and control measures of groundwater pollution, including multi-layer barrier on the pond surface, improvement of rainwater and flood drainage system of the pond and new vertical cut-off wall for groundwater, achieving the source control and contaminant plume control of groundwater pollution.