57.
In coal seam having prominent cleavages or geological disturbances, the intake and return airways shall be as far as away which is equal to

59.
An underground coal mine employing 1200 persons experiences 2 fatal injuries, 6 serious injuries and 8 reportable injuries during the year 2013. The total injury rate per 1000 persons employed for the year is

60.
Manpower distribution plan should not show one of the following.
Identify it

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