Abstract:Because of the dam-break accident, analyze its scope and extent of impact at different time points after a tailings pond breach. And according to the field measured parameters of a mine tailings pond, calculate and determine some significant parameters over dam-break, such as the total amount of drainage, the width of the breach opening, the maximum flow of the breach opening, the time of slurry discharge, the maximum flow of the slurry, the maximum wallop of the slurry and the theoretical hazard area of the breach, etc. In the end, employing the simplified model established by Gambit software of the downstream area over the tailings pond and performing the real-time animation simulation concerning the dam-break of tailings pond by using the ANSYS FLUENT software analyzes impacts about the dam-break tailings pond. The simulation results show that: 1) The dam is bursting in the tailings pond when the slurry mainly flows out in a columnar shape and begins to spread to both sides, and the velocity of the slurry about the breach opening is faster. 2) After the dam breaks in the 50 s, the reservoir’s slurry can pass through the entire downstream area. By the 80 s, the entire area downstream was almost completely submerged. 3) In comparison to the calculated datum of the tailings pond breach, the numerical simulation results are in good agreement with them.