Combination of three-dimensional discrete element method and geological model to simulate the migration of Taimali landslide Xinmo landslide and Shezailiao landslide-prone slope

Abstract

To discuss the failure mechanism and migration of the Taimali landslide Xinmo landslide and Shezailiao landslide-prone slope this study combined the three-dimensional discrete element simulation tool Particle Flow Code 3D (PFC3D) with the geological models of these study sites to simulate the dynamic processes of landsliding Some simulation results include: (1) The simulation of Taimali landslide shows that the best results of velocity distribution can be obtained when the friction coefficient is 0 07 Due to the difficulty to determine the range of deposition area many previous studies only considered the sliding block from source area The study successfully simulate the landslide event with a complex geological model (2) The simulation of Xinmo landslide can reproduce the dynamic processes of the landslide The event started from the destruction of source area and then the source block shoveled the material of transition zone Subsequently a large amount of landslide material accumulated on the old colluvium causing the second stage to move down again quickly eventually stacked on the river (3) The Shezailiao landslide-prone slope is divided into three blocks and various types of scenarios are simulated Finally the simulation results are compared with current situation and the development stage of the current potential landslide area is presumed and thepossible future development is speculated

Date of Award	2019
Original language	English
Supervisor	Guan-Wei Lin (Supervisor)