Landslide geological disasters

common and worldwide

feature intermittency and enormous destructive power. An effective numerical model for such disasters helps formulate the targeted prevention and control strategies of landslides. Focusing on the particle flow characteristics of landslide movement

this paper derives an expression of the dynamic friction coefficient of shallow landslides based on the μ(I) model

and constructs a corresponding framework for solutions using the Smoothed Particle Hydrodynamics (SPH) method. We examine the significant impact of particle fragmentation on landslide movement

and derive a relationship of its basal frictional force versus grain distribution to improve the model by applying the particle fragmentation law based on its potential of destruction. This model is verified against two previous studies in literature－classical three-dimensional slope model experiments

along with a sensitivity analysis on its parameters related to particle fragmentation effects

thus laying a basis for further study of landslide disaster prevention and control.