%A CHENG Wuchang ,ZHANG Hongmin %T THE EXPERIMENT OF MEDIUM2DEPTH2HOLE MINING IN BRECCIA TYPED GOLD DEPOSIT OF QIYUGOU CHENG %0 Journal Article %D 2002 %J Gold Science and Technology %R %P 13-16 %V 10 %N 4 %U {http://www.goldsci.ac.cn/CN/abstract/article_9780.shtml} %8 2002-08-28 %X

To resolve the problem of mining in large thick ore body and recovery of ore pillar in Qiyugou mineral area ,two successful experiment s of medium-depth-hole mining have been made in 28 600 tons. From the result ,medium-depth-hole mining is a high effective method in mining low grade and t remendous breccia mass.