实验结果表明，同一粒径组的非粘性花岗岩风化砂粒随底坡坡度的增加其起动流速变小；
Test results show:for the same grain size groups the flow velocity relating incipient motion of these granite sand grains decreases as the bed slope increases;
散体堆体由覆盖废石层和矿石层两部分组成的，散体颗粒的粒径组成分成1 ~ 10组，用中间值表示每一组颗粒的粒径。
The loose body consists of ore layer and mullock layer, and the size of the particles in loose body could be divided into 1 ~ 10 fractions, presented with average value.
利用近10000组资料，比较了包含本文公式在内的23种动床阻力计算公式，在已知流量、能坡和泥沙粒径时预测水深的计算精度。
The precisions of 23 movable-bed resistance equations, which contain the equations of this paper, have been compared by using near 10000 sets of measured data.
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