Optimization Of The Structural Parameters Of A Mining Site In A Copper Mine In Shangri-La And The Cemented Ore Column

The earth surface resources have been exhausted so that the exploitation of deep underground mineral resources will be the main source in the future.The filling mining method is most widely used in deep underground mining.The method of filling mining is bound to become one of the main mining methods in the future.And it is very important to select the strength of the filling body value in the filling mining method.The ? and ? orebodies of a copper mine in Shangri-La overlap on the vertical projection,and the waste rock layer between the two ore bodies is thicker.So it couldn't reach the grade of industrial recovery.In this paper,the ? and ? orebody of a copper mine in Shangri-La was taken as the research background and numerical simulation was taken as the research method.To combine the rock physical and mechanical parameters of the mine.Combined with the rock physical and mechanical parameters of the mine and around the overlap and non overlap areas of ? and ? orebody in the middle section of 3378m,the stope structural parameters and the strength of the filling body and pillar were determined respectively in these two parts.The main research contents are as follows:(1)It was combined with the physical and mechanical parameters of rock bodies of ? and ?orebody and surrounding rock,the width and range of 3378m overlap and non overlap area were calculated by M-athew chart method.(2)The numerical simulation software MIDAS/GTS was used to simulate the stope with overlapped and non overlapping areas,and the stope width was finally determined.(3)Used the engineering analogy method,Lu Ping correction model method and Terzaghi model method to calculate the strength of the mine filling body,and obtained the strength value range of the filling body.(4)Three design strength of backfill excavation scheme,combined with the actual filling sequence,the numerical simulation software FLAC3D by using three-dimensional finite difference numerical scheme,comparison of the simulation results,choose the optimal values of the backfill pillar strength.This thesis uses MIDAS/GTS and FLAC3D software,on the 3378m in the middle region of the overlapping and non overlapping stope structure parameters and the strength of pillar filling value were optimized.The results provide a theoretical basis for a copper mine in Shangri-La 3378m middle of the mining work.