Mining Engineering > GATE 2017 > Underground Coal Mining
A double ended ranging drum shearer is employed in a longwall mine of face length 150 m. The mining height is 3.5 m and depth of the web cut is 0.76 m. The cycle time for unidirectional cutting is 40 min. Considering bulk density of the coal to be 1.4 t/m3, hourly production from the face in tonne is ________.
Correct : 835 to 840
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