This paper presents an experimental investigation of mobility and deposition characteristics of dry granular flow, by a number of flume tests on silica sand no. 3 and silica sand no. 7, to interpret the effects of angle of slope, granular volume, cushion, granular structure, and granular size on the mobility and deposition characteristics of granular flow. Along a given slope, an increase of the amount of sand impaired its mobility. However, for a given amount of sand along a slope, an increase of the angle of slope resulted in a V-shaped change of the angle of mass center movement, implying the existence of a characteristic combination of the angle of slope and the amount of sand to yield the maximum mobility of granular flow. The angle of mass center movement increased while increasing the thickness of cushion, showing that the cushion impaired the mobility of granular flow. Granular structure using the mixed structures of silica sand no. 3 and silica sand no. 7 affected greatly the mobility of granular flow, by showing an inverted structure in the near runout area with the deposition of the materials in the upper half of original grading structure in the far runout area for the inverse grading structure and normal grading structure. The mobility of granular flow increased with the change in turn of the inverse grading structure, the uniform structure, and the normal grading structure. The increase of the grain sizes of granular material enhanced its mobility. In addition, the angle of mass center movement showed a more reliable assessment for the mobility of granular flow in comparison with the angle of maximum mass movement.

中文翻译：

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干颗粒流流动性与沉积特性的实验研究

本文通过对 1 号硅砂的大量水槽试验，对干颗粒流的流动性和沉积特性进行了实验研究。3和硅砂没有。7、解释斜角、颗粒体积、垫层、颗粒结构和颗粒尺寸对颗粒流流动性和沉积特性的影响。沿着给定的斜坡，沙子量的增加会削弱其流动性。然而，对于一定量的沿坡砂，随着坡角的增大，质心运动角呈V型变化，说明存在坡角与砂体量的特征组合。 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?砂以产生最大的颗粒流流动性。质心运动角随着垫层厚度的增加而增加，表明垫层削弱了颗粒流的流动性。使用硅砂混合结构的颗粒结构。3和硅砂没有。图 7 对粒状流的流动性影响较大，近跳动区呈倒置结构，反级配结构和正常级配结构在远跳动区原级配结构的上半部分沉积。颗粒流的流动性随着逆级配结构、均匀结构和正常级配结构的变化而增加。颗粒材料粒度的增加增强了其流动性。此外，与最大质量运动角度相比，质心运动角度对颗粒流的流动性显示出更可靠的评估。