A Research On The Stability Of Baogang Tailings Dam

China is a big mineral-producing country, and has a great power of annual mine producing ability. After a long time mining activities, the amount of different tailings and other mine wastes had up to a quite huge volume. The tailings facilities which build to store these wastes in different mine industries sited all over the country. These facilities'safety and stability is always a big issue. Tailings dam is the major component of the tailings pond, its stability determined the tailings pond's using and safety.Because the mechanical and seepage properties of the tailings are so complex, and the experiences and the methods of building tailings dam are so limited, the useful and reasonable methods to analysis or assess the stability of the tailings dam body have not been completely founded. Based on the study of tailings deposited regulation, the seepage flow field simulation and the stability analysis on the simple model, this paper made an assessment on the stability of the Baogang tailings dam.The major works and results of this paper are as follows:(1) According to the review of upper-formed tailings dam's failed reasons and failure types, and the affections analysis on stability of the tailings dam under the upper-formed body construction and work rules, it can be concluded that the key point for the dam body's stability is the dam slope's stability. Because the upper-formed tailings dam's body are formed one up one which called'starter dam', the dam body is a combined structure with coarse materials which used to build the'starter dam'and fine tailings which deposited near the dam. The dam's failure always were the slope's broken and followed tailings'spilled.(2) According to the experiments datum, we got the dam body materials'properties such as tailings components, particle size distribution, deposited regulation, physical states, mechanical and permeated properties. Based on the analysis with these datum, it find that the tailings'particle size , mechanical and permeated properties have very small difference in different depth or horizontal distance, and the tailings behind the dams in 50 meters can be seen as one element because the likely natures.(3) According to the permeability datum, the dam's seepage model were built with GMS. According to the simulation, I found the slurry infiltration were the big factor for the seepage flow in the dam body. Based on the reasonable supposed infiltration, we simulation and got the dam's seepage flow fields under the 100 meters, 150 meters, 200 meters, 300 meters long dry beach and the future's two sections'least length dry beach cases. These can be a basis for the stability analysis.(4) Based on the simulation results and materials'mechanical property datum, we calculated the stabilities of dam body with limit equilibrium analysis method under these specific long dry beach environments. From the results we got that the dam body were stable in these case.