THE CALCULATION AND EXPERIENCE OF THE MINING TOTAL LOSS AND IMPOVERISHING INDEX

Since Yunxi Mine launched the comprehensive experiment of the exploitation method and adopted the technology of homologous framework structure and hollow areas disposal (the new technology of artificial jamb, artificial floor and three-powerful operations) in 2000, the re-loss and re-impoverishing were reduced and the gold grade was highly improved. Therefore, the will be accomplished 2 levels' total loss ratio and impoverishing ratio were only 3.58% and 15.27% respectively as well as the better tech-economy efficiency were gained.