模型试验及数值模拟下尾矿库溃坝尾砂流演变预测

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Abstract The tailing flow generated after dam failure will evolve into Geo-hazards like debris flows. Tailings flow is characterized by rapid development, strong destructiveness, wide range of influence and insufficient warning time. It is of great significance for disaster prevention and mitigation to study the evolution law of dam-break tailings flow and its influence range. In the study, we used RAMMS debris flow software to establish a numerical three-dimensional model for the numerical simulation of dam-break. We tested the evolution process and influence range of the dam-break tailings flow on the downstream by building a physical model (1:150), and compared the experimental data with the numerical calculation results to verify the reliability and effectiveness of the numerical simulation. The results showed that in the process of the tailings dam-break, the tailings flow began to impact downstream villages (0.7 km away from the tailings dam) within 9 minutes when we started timing from the over-topping water reaches the bottom of the dam. As the dam break continued, the dam-break silt deposits gradually deepened, and the water level continued to rise. Finally, it caused a full-scale flooding of the downstream within 18 minutes, with an impact area of 0.558 km2, and the total amount of tailings in the reservoir could reach 1.3×107m³. It is strongly recommended that the design, management and risk assessment of tailings dams should be combined with potential hazards to increase disaster prevention and mitigation measures.

Key words： tailing dam failure physical model RAMMS disaster prevention and mitigation

Received: 18 May 2020 Published: 15 February 2022

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	Articles by authors
	LUO Changtai1
	2
	LI Dongwei1
	YU Guoping3
	ZHANG Chaochao1
	XU Bin2

Cite this article:

LUO Changtai1,2,LI Dongwei1, et al. Evolution prediction of tailings flow in dam break of tailings pond under model test and numerical simulation[J]. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(3): 307-315.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2022/V41/I3/307

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