摘要
为了进行尾矿坝逐渐溃决的泄砂量估算,通过借鉴水闸前水流流动和冲刷规律,建立了尾砂冲刷相关理论,并采用了不同于一般河道冲刷的计算方程,利用浑水挟沙力的变化计算了尾砂床面的下降,以便进行下一时段的尾砂泄流量计算.计算结果表明,距溃口最近的床面挟沙力约为20.03kg·m-3,床面下降0.54cm,远大于距离溃口较远的床面.计算反应了挟砂水流和尾砂冲刷的一般规律,为逐渐溃坝泄砂量计算提供了一种新的思路.
For the estimation of the railings discharge of the gradually-breaking tailings dam, the relative theories of railings scouring was proposed on the basis of the water flow and scouring before the sluice. The specific equation was adopted to calculate the decline of the tailings bed and then the tailings discharge. The results showed that the sediment-carrying capacity of the bed nearest to the breach was approximately 20.03 kg/m^3 ,and the bed declined by 0.54 cm,much larger than the bed more distant from the breach. The calculation reflected the general laws of sediment-laden flow and railings scouring, and provided a new method for calculating the tailing discharge of the gradually-breaking tailings dam.
出处
《甘肃科学学报》
2014年第6期126-129,共4页
Journal of Gansu Sciences
关键词
尾矿坝
逐渐溃决
挟砂水流
挟沙力
冲刷
Tailings dam
Gradual collapse
Sediment-laden flow
Sediment-carrying capacity
Scouring
