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More Mining Engineering Questions
The minimum distance from centre to centre, if the depth of the seam 450 m and gallery width is 4.8 m.
The following stoppings constructed to seal a fire area are
The pressure on a phreatic surface is
As the number of dust particles per cm 3 of air this method called as . . . . . . . .
A single lamp placed centrally at the roof provides 40 lux illumination vertically below, at the floor of an underground workshop. The workshop of dimensions 20 m × 20 m with height 4m. Assuming uniform spherical dispersion of luminous intensity, the floor level illumination in lux at any corner of the workshop is