Abstract: In view of the loss and depletion of sublevel caving without sill pillar,the development process of the ore drawing stochastic medium theory ,ore drawing continuous medium theory and optimization of blasting are discussed respectively,which include bulk movement probability density equation,eccentricity equation,the utility model of blasting optimization and so on.Then quantification relationship of drawn out body and loss body of the ore drawing and the collapse body of the caving ore are analyzed in detail,and the quantitative circle model of them is established so as to control and predict the ore exploration and reduce the ore loss and depletion.

Key words: Drawing theory, Blast optimization, Caved ore body, Loss and depletion