Mining Engineering > GATE 2021 > Mine Planning
The grade-tonnage distribution for the ultimate pit of a mine is given below.
The mill cut-off grade is 0.5% Cu. The annual mining capacity (ore + waste) is 4.5 million tonne and milling capacity is 1.0 million tonne. Excavation is planned in such a way that either of the mine or the mill runs at full capacity throughout. The planned life of the mine, in years, is [round off to one decimal place]
Correct : 6.0
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