The influence of particle size on the spread distance and angle of friction of granular materials

Chyan Deng Jan, Litan Dey

研究成果: Conference article同行評審


To produce a hazard map and thus provide mitigation measures against natural catastrophic events such as landslides, avalanches, and debris flows, it is necessary to determine the spread distance of such flows. There is a well-documented relationship between the angle of friction and the debris flow volume, allowing one to determine the possible distance a debris flow can travel. However, the effect of mean particle size (d50) and the sorting coefficient (Sc) on the final spread distance (Df) has received mere attention. In this study, a mini conical-shaped mould was used to measure the final spread distance (Df) and angle of friction (αf) for various dry granular material samples both in air and in water. Experimental results indicated that a granular material sample with a smaller d50 travel a longer distance compared to a sample with a higher d50. However, a sample with a smaller d50 results in a smaller angle of friction than the one with a higher d50. Conversely, a well-sorted sample has a smaller spread distance and larger angle of friction. Results also indicated that the spread distance in air is slightly larger and the angle of friction is slightly smaller than in water.

期刊E3S Web of Conferences
出版狀態Published - 2023 8月 18
事件8th International Conference on Debris Flow Hazard Mitigation, DFHM 2023 - Torino, Italy
持續時間: 2023 6月 262023 6月 29

All Science Journal Classification (ASJC) codes

  • 一般環境科學
  • 一般能源
  • 一般地球與行星科學


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