乱石包高速远程滑坡流态化运动模式及摩擦热效应研究

doi:10.13722/j.cnki.jrme.2021.1177

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Abstract Rock avalanche dynamics is always a hot and challenging issue in the field of landslide. Focusing on this issue，the Luanshibao rock avalanche is chosen as an example with its whole propagation process being simulated by MatDEM，to further illustrate its fluidized propagation and frictional heating effect from a mesoscopic point of view. It is reached that：(1) The velocity of the sliding mass presents an obvious vertical zoning feature with the bottom forming an intensive shearing zone characterized by lower velocity and the upper part characterized by higher velocity. (2) The maximum velocity of the mass center is 33.3 m/s. Its horizontal runout and vertical drop are 1469.9 and 374.1 m，respectively，with the equivalent friction coefficient being 0.255. (3) Frictional energy occupies 44.3% of the total loss of the potential energy，which mainly distributes along the basal facies in the translation zone. Correspondingly，the entrainment effect in the translation zone is obviously higher than that in the accumulation zone. (4) The frictional energy generated in the propagation can cause the basal facies to rise by 64 ℃ with frictional heating effects generated. (5) In the translation zone and the rear part of the accumulation zone，the equivalent friction coefficient displays in low values，which is attributed to the coupling effect of momentum transfer，entrainment effect and frictional heating effect. The simulated results have a good consistency with the field investigated data，which is conducive to the revealing on its propagation mode and frictional heating effect. The simulated results can provide significant scientific value for rock avalanche kinematics and dynamics.

Key words： slope engineering Luanshibao rock avalanche MatDEM propagation mode momentum transfer entrainment frictional heating effect

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	WANG Yufeng1
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	MING Jie1
	FENG Zhiyi1
	CHENG Qiangong1
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Cite this article:

WANG Yufeng1,2,3, et al. Research on the fluidized propagation and frictional heating effect of the Luanshibao rock avalanche[J]. , 2022, 41(S2): 3174-3188.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2021.1177 OR https://rockmech.whrsm.ac.cn/EN/Y2022/V41/IS2/3174

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