Study On Optimization Of Stope Structure Parameters Of A Copper Mine In Yunnan Province

The division of the size of the mines and pillars in the open pit mining method not only affects the recovery of mineral resources,but also affects the stability of the stope.Its characteristic is that the ore blocks are divided into mine houses and pillars,first mining houses,and then Mining column.The size division of mine houses and pillars has become a key factor affecting the recovery rate of mineral resources and the stability of stope.Reducing the size of the pillars and increasing the size of the mine will inevitably increase the recovery rate of the mine.Increasing the size of the pillar and reducing the size of the mine will be the main factor for ensuring the safety and stable production of the stope.Therefore,how to determine a reasonable mine? The size of houses and pillars is a necessary prerequisite for ensuring mine safety and improving mine recovery.In order to obtain a reasonable stope structure parameter,this paper uses the numerical simulation software MIDAS/GTS to simulate and analyze the orebodies in Dongchuan Jinshui Mining.This simulation analysis has designed a total of s ix kinds of mining programs,analyzing the width of the different mines,the stability of the stope in the width of the pillars and the economic benefits of the mine.Through the analysis and comparison of the results of displacement,stress,and recovery rate under different mining schemes,the most reasonable stope structure parameters were finally selected.The research contents of the article mainly include the following aspects:(1)Check the domestic and foreign literature data to understand the curre nt status of the optimization of stope structure parameters at home and abroad.(2)On-site collection of geology,occurrence conditions of ore bodies,and physico-mechanics parameters of mines and surrounding rocks in the Dongchuan Jinshui Mining Area.(3)Analyze the rock mechanics parameters collected in the mine,and calculate the rock mechanics parameters in the simulation calculation application through the reduction method.(4)By using the numerical simulation software MIDAS/GTS to simulate and analyze the deep ore body in Jinshui Mining,the mining process of six different stope structure parameters was simulated and analyzed,and the displacement and stress under different mining schemes were obtained.(5)Through the analytic hierarchy process,it is concluded that the structural parameters of the stope with a span of 40 m and a pillar length of 6m along the strike are the most reasonable parameters of the stope structure and provide basis for the deep mining in the mine.