Abstract: The Xiejiadian landslide,a typical landslide located in Longmen County,was triggered by the 2008 Wenchuan earthquake with high speed and long run-out.A preliminary study of the dynamic mechanics of landslide debris under strong earthquake by landslide debris rock dynamic load mechanics tests and analyses of micro-structural features were carried out.The results show that the red syenogranite is a long gap and the degree of development of fractures in the rock is higher than that in the black-bro...