Dongshengmiao lead-zinc mine has carried out a lot of work on the recovery of pillar resources,and gradually formed a relatively complete resource recovery and goaf management system through years of practice.According to the con-dition of one side of No.11-1 orebody 02 intercolumn is cemented and the other side is goaf,the recovery scheme of forced caving of upper surrounding rock and mining waste rock combined with filling goaf and backward recovery row by row under overburden was adopted,which successfully recovered 209,800 tons of mineral resources,made a good index of the com-prehensive recovery rate of inter column 75.62%,dilution rate 23.48%.
维普
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