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- Title
Dynamic behavior of rock avalanche using irregular particle discrete element method.
- Authors
Wang, Zhongfu; Li, Haoyuan; Bi, Dan; Li, Guipeng
- Abstract
To analyze the influence of microscopic contact model parameters on the dynamic behavior and accumulation range of rock avalanche, a program module was written by VC++ to establish the complex particle of almost real shape on the base of industrial camera and 3D laser scanning technology, which overcomes the shortcomings of traditional particle discrete element method. Furthermore, the dynamic simulation on rock avalanche by PFC3D based on the establishment of real particle shape was carried out, and the simulation results were calibrated with indoor small-scale test results. The comparison results indicate that the pebble-facet friction coefficient and pebble-pebble friction coefficient have a significant effect on the accumulation form and migration distance of rock avalanche. As the friction coefficient increases, the migration distance, accumulation width, and peak velocity decrease, but the accumulation height increases; the acceleration decreases with pebble-facet friction coefficient increase, and the pebble-pebble friction coefficient has a little effect on the acceleration; the contact stiffness ratio of pebble-facet and pebble-pebble and the acceleration have a little influence on the accumulation form and migration distance. The numerical simulation matches the model test results well when Kn/Ks (Pebble-facet) is 8.13, F (Pebble-facet) is 0.6, Kn/Ks (Pebble-pebble) is 1.67, and F (Pebble-pebble) is 0.02.
- Publication
Arabian Journal of Geosciences, 2022, Vol 15, Issue 4, p1
- ISSN
1866-7511
- Publication type
Article
- DOI
10.1007/s12517-022-09620-3