Study On Numerical Simulation Of Tailing Sand Advancing After Dam-break

Tailing reservoir is used for storage of metal or non-metal mine tailing, which is with high potential energy. Once dam break occurred, the tailing sand will form sand slurry rushing to the downstream, which brings great risks on the safety of lives and properties of citizens living at downstream. The process of the tailing sand advancing after dam collapse is a very complex problem. The relative research about it is very lack, and it is still using the calculation method of reservoir dam to solve the problem of tailing dam. Therefore, it is necessary to strengthen the study of tailing dam-break.This paper firstly analyzes basic theory of simulation method, and then discusses accessor method of reheological parameter. Finally, this paper is mainly about two aspects, one is about evolution rule of tailing slurry, the other is about cushion effect of dam engineering?s prevention. The main contents include:(1) Experimental value of reheological parameter is expanded 1000 times, and then it is used as the numerical simulation parameter, so that the stacking effect of tailing slurry can be simulated. The simulation results that flowing process and submerged scope of tailing slurry are similar with the results of actual dam-break cases, so the simulation results can be proved to have certain rationality. Also, the calculation results of sand flow formula can match the simulation results in a certain extent.(2) The numerical simulation method can consider effects of many complicated factors, it can reflect the whole dynamic flow process which is affected by mountain block and river turning. By selecting appropriate rheological parameters movement equation of tailing slurry, the numerical simulation results are close to the actual situation.(3) Planting tree, sowing grass and building blocking dam is good to stop tailing slurry. Plants in the downstream are more arborous, the effect of prevention engineering is more obvious. Blocking dam can intercept tailing slurry before the dam, which can shorten motion distance of tailing slurry.