Mining Engineering > GATE 2026 > Longwall Mining - Shearer and AFC
A coal seam of 2.4 m thickness is mined with a DERD shearer at a cutting speed of 0.6 km h-1. The web depth of the cut is 0.5 m. The average cross-sectional area of coal on the AFC during transportation is 0.24 m2. For the evacuation of cut coal from the face with 10% spillage, the required minimum velocity of the AFC, in m s-1, is _______________. (rounded off to two decimal places)
Correct : 0.92
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