Tóm tắt:

The paper analyzes kinds of losses of basic valuable minerals in mining complex structured limestone deposits. Diagrams of loss of valuable deposits and the blend of waste rock are also made in mining bedding deposits. Technical and economic data explaining for the proper decrease of the loss show that raising the dilution or loss needs to base on the comparison of mining alternatives fulfilled in the contact area of waste rock and material. Norm of loss of valuable mineral is created to determine the technical and economic of each mining block using geological exploration documents. The criterion of maximum NPV of mined deposit should be used to determine the norm of loss of valuable mineral, in addition, the paper proposes a technology to ensure a proper use of mineral resource and to decrease the loss of valuable loss in mining complex structured limestone deposits.