Abstract:Sedimentary consolidation is a process of soil volume compression with time increasing. With the increase of tailings heap time, pore water is discharged, the density of tailings increases, and the strength characteristics of soils change. The tailings dam increases too fast, tailings sedimentary consolidation is insufficient, which is not conducive to the stability of the tailings reservoir and increases the probability of disasters. In this paper, design tailings dam break models test, explores the correlation between tailings deposit consolidation and tailings dam break. The results show that: With the increase of drainage distance, the tailings accumulation depth gradually decreases. Accumulation depth increases slightly in the vicinity of the accumulation area due to the change of bottom slope. With the increase of sedimentary consolidation time, the tailings accumulation depth in the upstream of circulation area gradually increases. When the sedimentary consolidation time exceeds 5h, the tailings accumulation depth on the upstream side begins to decrease. When the tailings degree of consolidation increases, the amount of tailings dam break decreases. The dam break amount of consolidated 24h dam break test is 7% less than that of unconsolidated dam break test. The variation law of submergence range in accumulation area with time is basically the same in the test. But the maximum drainage distance decreases with the increase of sedimentary consolidation time. Use piecewise function to fit the variation rule of dam-break submergence range with time. Provide reference basis for downstream disaster prevention and risk aversion work.