Research on the Model Test of the Debris Landslide’s Evolution Process in Tailings Reservoir

Abstract

Based on the actual tailings reservoir project, a model test study on the evolution pattern of dam-breaking debris landslide is carried out. According to the similarity criterion of water flow and mud-sand movement, coal dust satisfying the similar relationship is selected as model sand. By analyzing the dam-breaking debris landslide’s range, propulsion speed, submerged depth distribution and particle deposition characteristics, the movement pattern of the landslide is obtained. In the short time after the dam break, the submergence range and advancing speed of the debris landslide increase rapidly. During the propulsion process, due to the increase of the debris landslide in the downstream of the valley, the debris landslide is diffused and the energy consumption during the flow is made. The advancing speed decrease until the landslide stops; The final submerged depth distribution of the dam breach has obvious randomness and non-uniformity, which is mainly related to the downstream terrain; According to the particle size grading analysis of the soil sample at the characteristic location, the further away from the dam toe, the finer particle content in the debris landslide.

Impact of inundation range of overtopping dam break of tailings pond under actual terrain conditions

“…Liu [17] designed a physical model of a tailings pond using the similarity model theory and observed the evolution of the discharged flood. Qi et al [18,19] conducted a physical test on the break of a drainage system, which led to the continuous rise of the phreatic line and induced dam break, summarizing the modes and phenomena of damage caused by the drainage break. Yin et al [20] studied the evolution law and dynamic characteristics of debris flow after a tailings dam breakthrough using a similar simulation test.…”