Disintegration and fragmentation effect generally exists in the process of high position rock landslide movement,which can change the material state and motion state of landslide,thus affecting the energy distribution and dynamic transmission characteristics of landslide. By large scale physical model test,this paper deeply studies the slip source block body strength,volume,thickness and joint development degree and slope on the influence of rock disintegration and fragmentation,discusses the disintegration and fragmentation characteristics and the law of detrital energy dissipation of high position rock landslide debris flow,and reveals its momentum transfer mechanism. In the process of dynamic transmission of landslide debris flow,the velocity loss in the front is obviously less than that in the rear,the leading edge has obvious "secondary acceleration",and a large number of fine particles accumulate at the far end. The rear and forward parts of the landslide have obvious velocity and power transfer effect,and the higher the degree of fragmentation,the more significant the dynamic transfer effect. The process of disintegration and fragmentation is accompanied by the transformation,transfer and loss of energy. Under the control of the degree of breakage,the energy dissipation accounts for 3.32％-21.03％ of the total potential energy.
关键词
高位岩质滑坡碎屑流/大型物理模型试验/动力传递/解体破碎/能量耗散/工程地质
Key words
high position rock landslide debris flow/large scale physical model test/power transmission/disintegration and fragmentation/energy dissipation/engineering geology
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