Abstract:Aiming at the disasters such as tailing dam failure caused by the concentration of ore slurry, the tailing dam of a copper mine in Sichuan was used as the engineering background, and the model test was carried out based on the test device for breaking debris flow. Observation equipment was used to break the tailing dam under the conditions of different slurry concentrations. The law of debris flow movement was analyzed, and the research results showed that with the continuous increase of the slurry concentration, the movement process of the debris flow in the downstream valley became more intense, and the flow pattern and impact force of the debris flow were also greater. This research can provide sound guidance for the risk issues such as the prediction of the degree of dam failure and debris flow and the scope of disasters in tailings dams.