摘要
Abstract
The mining,ventilation and transportation system of an iron mine in East China has been improved and is in the stable production stage,and the ore quality is balanced and stable.Iron ore belongs to hydrothermal intrusion,late metamorphic skarn-type orebody,ore by paleogeographic sedimentary environment and structure,magmatic hydrothermal superimposed transformation of the uneven distribution of the situation.In particular,there are certain off-balance sheet ores or low-grade ores in the western part of the mining area,which have not been fully recycled due to the market situation.In this paper,the profit and loss balance method is used to analyze the reasonable economic grade and boundary equilibrium grade of the mining area,which provides reliable geological basis for secondary delineation of ore body,increase of resource reserves and increase of recovery of off-balance ore resources.关键词
经济品位/资源利用/盈亏平衡Key words
economic grade/resource utilization/profit and loss balance
