高位远程岩质滑坡动力解体效应研究

doi:10.13722/j.cnki.jrme.2022.0010

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Abstract High position and long runout landslides have a large height of fall，potential energy and kinetic energy conversion space，and obvious dynamic disintegration effect，which is one of the difficulties and hot issues in the research field of geological disasters. Based on the discrete element numerical model test，the influences of structure plane density，structure plane strength and disintegration degree of landslide rock mass on dynamic disintegration during movement are deeply analyzed. Also，the dynamic mechanism of high position and long runout landslide-debris flow is revealed. The results show that (1) high position and long runout rock landslide dynamic disintegration mode is mainly divided into two types：the active disintegration of differential motion and the passive disintegration of impact collision. (2) Structural plane density，structural plane strength and disintegration degree are the fundamental causes affecting the high rock landslide dynamic disintegration effect；(3) Dynamic disintegration reflects energy conversion and consumption. Friction，inelastic deformation and disintegration are the main energy consumption modes，and the friction energy consumption is the leading energy consumption，accounting for more than 50%；(4) The front sliding body has significant speed transmission，and the velocity transmission phenomenon of the sliding body with high disintegration degree is more obvious than that of the sliding body with low disintegration degree. The research results show that in the process of geological disaster investigation，monitoring and prediction，the structural feature investigation and evaluation of the rock mass should be fully conducted. Also，the impact of the dynamic disintegration effect should be fully considered in the risk assessment of high position and long runout landslides.

Key words： slope engineering high position and long runout landslide dynamic disintegration structural plane features energy dissipation speed transmission

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	Articles by authors
	GAO Yang1
	YIN Yueping2
	LI Zhuang3
	LI Bin1
	WU Weile3
	ZHANG Han3

Cite this article:

GAO Yang1,YIN Yueping2,LI Zhuang3, et al. Study on the dynamic disintegration effect of high position and long runout rock landslide[J]. , 2022, 41(10): 1958-1970.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2022.0010 OR https://rockmech.whrsm.ac.cn/EN/Y2022/V41/I10/1958

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