尾矿坝干滩长度确定方法及影响因素分析

Determination Method for Beach Width of Tailings Dams and Its Influence Factors

针对目前尾矿坝干滩长度无统一控制标准的现状,提出了根据允许水力坡降、允许最大流量、浸润面埋深以及边坡稳定性等判据确定尾矿坝干滩长度的方法。分析了尾矿渗透系数、尾矿填筑速度、排渗设施以及尾矿坝坝高等因素对尾矿坝干滩长度的影响:当尾矿的渗透系数较小、尾矿填筑速度较快、排渗设施效果较差以及尾矿坝坝高较高时,应适当增加尾矿坝的干滩长度。分析表明,依据文中所提判据可以很好地确定尾矿坝的干滩长度,相对于传统方法提高了计算精度,该方法具有一定的可行性可靠性。

At present ,there is no unified standard for beach width of the tailings dams .Taking the allowing hydraulic gradient ,allowing maximum flow ,depth of the saturation and slope stability into account ,a method was put forward to determine the beach width .The influences of the permeability coefficient ,the filling speed ,the drainage facilities and the tailings dam height of the beach width were analyzed .The results of this study showed that the beach width should be expanded when the permeability coefficient is smaller ,tailing filling is faster ,effect of the drainage facilities is poor or the height of the tailings dam is higher .The result of example analysis indicates that the method suggested by this study is feasible and reliable .Comparing with the conventional method ,it is more accurate at determining the beach width .