NUMERICAL SIMULATION OF FLOW AND DEPOSITOIN PROCESS OF ROCK AVALANCHE

Large rock slides e and then subsequent broken rock mass avalanches are one of the most destructive geological hazards in the world.Especially,the rock avalanches have intensive run-out ability and destructive power.This paper mainly studies the flow and deposition mechanism of rock landslide induced avalanche.Using a two-dimensional particle flow method,this paper numerically examines the influence of the original height,volume,slope angle and depositing substrate's frictional coefficient and waviness to avalanches.Numerical test results reveal that: (a)the flow and deposition process of a rock avalanche present a discrete and fluid-like nature; (b)increasing in the original height,the volume of rock avalanche and the slope angle would increase the maximum run-out length; and (c)increasing in the frictional coefficient and waviness of the deposition substrate would decrease the maximum run-out length.