RESEARCH ON MOVEMENT PROCESS AND CHARACTERISTICS OF DEBRIS FLOW UNDER DIFFERENT SLOPE CONDITIONS BASED ON NUMERICAL SIMULATION

Debris flow has become one of the most serious geological disasters. It has the characteristics of large area and serious loss. The study of the movement process of debris flow is the precondition for the prevention and control of debris flow. In this paper, the Massflow debris flow numerical model is used, and the Voellmy resistance model is used to simulate the movement process of debris flow under two different slope shapes and five different slopes. The movement process and accumulation process of debris flow are analyzed, and different slope conditions are carried out. Analysis of the movement process of the debris flow. The results show that the channel-shaped slope shape can reflect the movement characteristics of the debris flow more than the slope-type slope shape. With the gradual increase of the slope, the energy of the debris flow fluid provided by the topography is further increased, and the maximum speed and the maximum distance of the rushing are further increased. Large, the area of its corresponding deposit increases, but the maximum thickness and volume of the deposit tend to decrease. This paper discusses the relationship between different slope factors and debris flow accumulation and provides a scientific basis for predicting debris flow accumulation under different slope topographic conditions, which will provide some help for the next step of debris flow geological disaster management and geological environment ecological improvement.