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A surface miner with 2 0 m cutting drum width excavates...

This question belongs to Mining Engineering Introduction To Mining Engineering
Introduction to Mining Engineering
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A surface miner with 2.0 m cutting drum width excavates coal in windrowing mode from a bench with effective face length 200 m. The cutting speed of the surface miner is 10 m/min and the cutting depth 25 cm. The density of coal is 1.4 tonne/m3. If the average turning time of the machine at the face end is 5 min, the rate of production in tonne/hour becomes

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Correct Answer: Option B
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