DISCRETE ELEMENT NUMERICAL SIMULATION RESEARCH ON FRICTION HEAT IN SLIDING ZONE OF THE LANDSLIDE

High-speed remote landslide has become a hotspot in geological disasters due to the strong disaster. During the process of large-scale landslide, the heat generated by friction of the sliding zone increases the temperature of the local area, which changes the mechanical properties of the rock and soil. In order to explore the heat generated and accumulated in the sliding zone quantitatively, this paper developes a slope model of 230, 000 particles by using the MatDEM discrete element software. It simulates the sliding process of landslide. The results show that MatDEM simulates the typical characteristics of landslide accurately and shows the law of heat in discrete element model. The simulation results show that the "kerosene" high heat zone is formed near the sliding zone. With the highest heat at 3×10⁵J in sliding zone cause the temperature increase 545.5℃ with heat capacity of 550J/kg·℃ when the slope heights 100 m. The high speed is caused by high temperature in the slidezone. High-calorie belt attaching to the sliding zone occur displacement accompanying the thickest sliding body. Morever, it is proved that the MatDEM can use unit connection state and the thermal field demonstrate the development law of cracks directly in the sliding body and sliding bed, which provides a new numerical calculation in landslides.