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Mining Engineering Mine Ventilation Difficulty: Medium

Mine air should contain minimum . . . . . . . .% O 2 in USSR.

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More Mining Engineering Questions

A 12 tonne diesel locomotive of 60 kW is plying in an underground haulage roadway. The coefficient of adhesion is 0.25 and the maximum gear efficiency is 80%. The speed in m/s at which it will haul a train at its full power is Which blast indicator of an explosive shows its ability to break solid hard rock. The main transporting medium where high outputs are to be handled. The theodolites fitted with micrometer for taking . . . . . . . . Spontanious heating of coal is mainly found in . . . . . . . .