大冶铁矿地下采区分段储量的计算及实践

Pillarless sublevel caving is widely applied in metal mines. These mines generally calculate stratified extractable reserve with horizontal cross-section method, and actualize reserves management with stratified extractable reserve in production sublevels. based on many years of experience,in the article author bring forward the concept of sublevel extractable reserve,introduce detailedly,Longdong ore body Daye iron mine for example,the calculation method of sublevel extractable reserve,compare and analyse computational error. Taking advantage of the method can reduce the computational workload, short the calculation cycle and improve the degree of reliability of extractable reserve,be propitious to guide the mining production,advantage large calculation of ore loss and dilutio,the dynamic reserves management.it can supply references to similar mines.