Mining Engineering > GATE 2017 > Underground Coal Mining
A mine is being developed by bord and pillar method with a gallery size of 4.8 m×2.4 m. The mine operates in 3 shifts per day and 6 faces are blasted per shift. The average pull per round of blast is 1.2 m and the bulk density of coal is 1.4 t/m3. If the OMS is 2.5, then the average manpower deployed in the development section per shift is ____________.
Correct : 46 to 47
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