Study On Seepage Characteristics Of Tailings Pond

Most of the existing tailings facilities at home and abroad are traditional wet-draining tailings ponds.Most of the wet-draining tailings ponds are in a fluid state and the dam body is unstable,so dam breaks are prone to occur;the current solution to the infiltration of tailings ponds Most of the lines use numerical simulation and model test methods.In view of this,it is particularly important to establish a theoretical model of the tailings pond and corresponding analytical solutions.Due to the inherent shortcomings of traditional wet tailings ponds,a new technology for storing tailings in dry pile tailings ponds came into being.However,the theory of seepage field and catastrophe analysis of dry pile tailings pond under rainfall conditions is not yet mature,and the design theory of dry pile tailings pond is not perfect yet.Therefore,to carry out related research on the calculation model of dry pile tailings pond under the action of rainfall,to improve the design theory and method of dry pile tailing pond,promote the application of dry tailing pond technology in the mining industry,reduce tailing pond dam break disaster,It is of great significance to save land resources and reduce environmental pollution.This article has done the following work:Aiming at the wetly dischaiging tailing pond,a theoretical model of the tailing pond soaking line is established.The differential equation of the tailing pond soaking line is derived using the energy equation and Darcy’s law of permeation,and the upstream and downstream boundary condition equations are established on this basis.,The analytical solution of the tailings pond soaking line is solved;considering the complexity of the tailings pond,the influence of tailings sand anisotropy,tailing pond geological stratification and bottom slope topography on the tailings pond soaking line distribution is discussed,and the The adaptability of the analytical solution proposed in the article to the solution of the infiltration line of complex tailings ponds;starting from the actual tailings pond project,the effectiveness of the analytical solution of the infiltration line is further verified.Aiming at the dryly stracking tailings pond,a method for establishing rainfall patterns is proposed.On this basis,a numerical analysis model of the seepage field of the dry pile tailings pond under the action of periodic rainfall for many years was established,and the temporal and spatial evolution of the seepage field of the dry pile tailings pond under the condition of periodic rainfall for many years was studied.The results showed that,A relatively stable seepage field will be formed in the dry pile tailings pond under the action of cyclic rainfall for many years.Based on this paper,the concept of a relatively stable seepage field in the dry pile tailings pond is put forward,and different rain patterns(decreasing type,increasing type,Normal type),the change rule and influencing factors of the relatively stable seepage field of dry pile tailing pond under different annual rainfall(400 mm,1 000 mm,2 000 mm),and analyze the characteristics of the relatively stable seepage field The fluctuation law of parameters in a rainfall cycle;considering the influence of external factors on the evolution of seepage field,this paper starts from the two conditions of evaporation and reservoir bottom seepage,and briefly discusses the influence of these two factors on the relatively stable seepage field.