Seepage And Stability Analysis Of A Tailing Reservoir

With the socio-economic development and the increase in the rate at which tailings dams are being built,many of the earlier tailings pits have been closed and partially depleted to prepare for closure,Will be or have to leave the production process,but the resulting decline in routine maintenance also makes this part of the safety of tailings to be regularly assessed.In this paper,based on the closed reservoir engineering of the Sikou tailing dam of Shanghe Molybdenum Mine in Luonan,through the analysis of field survey data and laboratory test data,coupled with GeoStudio finite element software simulation,the seepage and consolidation coupling analysis is carried out,And puts forward some suggestions on the problems in the later period of the closed storage,which provides the theoretical basis for the closure of the tailings reservoir.The main conclusions are as follows:First of all,through the analysis of the field exploration data,it is found that the material partition in the tailings reservoir is extremely uneven,and the zoning regularity is not obvious,which is a great obstacle to the tailings reservoir seepage.Secondly,the seepage analysis of the tailings reservoir shows that the seepage line is higher and is unfavorable to dam seepage.And carries on the simulation analysis under different water level under different conditions,and find that with the increase of the water level in the reservoir,slope water level rise obviously,up to 10 meters to 20 meters in the initial dam,have been part of a high head slope position,close the library,need to reduce the water level in the reservoir.Finally,on the basis of deep flow calculation,it is found that the static and dynamic stability of the dam can meet the requirements of the slope stability of the tailings dam.With the increase of reservoir water level,when the dry beach length from 120 meters to 65 meters in the reduction process,the safety of intermittent drop obviously,can maintain the same security at a certain level within the scope of the library,and then there is the collapse process,the rise in water level process,in the process of library the obvious potential sliding interval and internal stress and balance,when the dry beach length is less than 75 meters,has been unable to meet the requirements.