The Research On Stability Of Dayanggou Gongchangling High Bench Dumping Site

High bench dumping site can significantly reduce the mining industry occupies,but its occasional unstability may cause mining disasters and serious project accidents,which will affect mining work safety and bring about heavy property loss.Particle size grading phenomenon is an important feature that makes high bench dump different from soil slope in general.So a targeted research on stability of high bench dump is of great scientific significance and engineering application value.By studying the Dayanggou Gongchangling high bench dumping site,a numerical simulation model is established to analyze the stability of different slope surfaces through the combination of field investigation,limit equilibrium method and finite difference method.Main works are as follows:(1)Through field investigation,the size distribution of the heaping granular material is obtained.Then the particle size fitting curves are made in the use of Matlab software.The study finds that the heaping interparticle material in the dumping site presents the phenomenon of particle size grading.(2)Established in the use of Matlab software,the cellular automaton simulates the random distribution of the heaping interparticle material well.(3)On the basis of field investigation and the combine use of cellular automaton and FLAC3 D,the models of homogeneous slope and particle size grading slope are established.In the use of Geo Studio,a slope model is established in the limit equilibrium method.The stability of high bench dumping site and the influence from particle size grading phenomenon are compositely analyzed.The results show that the dumping site is safe presently and the particle size grading phenomenon is conducive to the stability of the high bench dumping site.