Abstract: MZ)WT5"BZ(1.College of Information and Control Engineering,Jilin Institute of Chemical Technology,Jilin 132022,China;2.College of Resource and Civil Engineering,Northeastern University,Shenyang 110004,China;3.Jihua No.9 Middle School of Jilin,Jilin 132022,China) Surda copper mine is a underground mine in production of Hindustan Copper Limited,the capacity of mine is 0.42 million t/a.In order to meet the market demand,Surda mine will expand the capacity from 0.42 million t/a to 0.9 million t/a.The current structural parameters can't meet the capacity of 0.9 million t/a,by optimizing structural parameters according with production capacity of current equipment,i.e.using high sublevel,large interval,sound caving step,and large cross section,blasting ore bulk will be enhanced by 94%,blasting times will be reduced by 50%,ventilation effect will be enhanced,local fan energy consumption will be reduced,ore recovery will be enhanced by 9%,economic performance will be enhanced by 150 millions