Extraction of a mine is necessary for Pre-feasibility study and decision to continue or stop it or, to operationalize the plan and the investment decisions made for the construction of a mineral unit.The First, depending on exploration, at what point is located, namely conceptual design, called Basic and detailed.

The design is done in different stages of mining (open pit or underground). This difference is due to difference in the accuracy of the output process includes: the accuracy of the estimates, Details of work, scale and detailed maps.

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