Research on simulation and early warning of tailings dam-break accident in Laoguan River Basin
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Abstract:
This article was aimed to establish an early warning system of tailings dam-break accidents, and provide guidance for emergency operation. The model of sand flow from tailings dam-break was used to simulate accident scenarios based on the characteristic of tailings dam-break. Combining simulation results with GIS tools, the process and impact of accidents were predicted and displayed spatially. The article used Laoguan River Basin, a tributary of the middle route of South to North Water Transfers, as a study case, and chose two typical tailing ponds from upstream and downstream to simulate accident scenario. The scale of the accident impact from upstream was 55 km, and the residential land in 3-5 km downstream of the tailing pond would be subjected to serious harm. The duration of accident impact was about 6-7 hours. The scale of the accident impact from downstream was 13 km, and the agricultural resources from downstream would be subjected to main harm. The duration of accident impact was about 2 hours. The simulation results have verified the practicability of the research and provided decision supports for emergency measures of tailings dam-break and daily safety management in this basin.
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