一种新型尾矿废石联合排放方法

我国200~300 m级的大型排土场和尾矿库逐渐增多,占用大量土地资源,同时给下游居民设施带来很大的威胁。研究安全、经济的尾矿—废石联合堆放方法可以节约大量土地,具有重大的经济和环境效益。针对一种新型的尾矿废石联合排放方法—废石格网,从应力变形、渗流固结的角度对废石与尾矿的相互作用进行了理论分析和基于有限元和极限平衡条分法的数值模拟,结果表明废石体的合理布置可以有效降低尾矿库深部尾矿的渗流路径,加速尾矿排放过程中累积超静孔压的消散,显著降低坝体浸润线,提高滑裂面经过土体的抗剪强度,提升尾矿坝的抗滑稳定性。

A new method for co-disposal of tailings and waste rock

A growing number of 200~300m high waste-dump and tailings pond have been or are to be constructed in China, which not only use up a lot of land, but also greatly threaten the downstream civilian infrastructure. Co-disposal of tailings and waste rock is of significant importance for saving the land resource and environmental conservation. This paper conducts theoretical analysis and numerical simulation on a new method for co-disposal of tailings and waste rock-waste rock grid(WRG). From the point of stress-strain and consolidation theory, theoretical and numerical analyses based on the finite element and limited equilibrium slice method indicate that WRG can improve the boundary condition for seepage and effectively, lower the phreatic line and speed the dissipation processes of excess pore pressure, hence anti-slide stability and liquefaction resistance of tailings dam can be enhanced.