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More Mining Engineering Questions
. . . . . . . . type of fan prefer to install fan in less space at surface.
The portion of the face at its end. Where cutting starts
Mucus in the throat and respiratory passages catches the dust size particles of coarser size . . . . . . . . and above diameter.
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
In degree I gassy mines the rate of emission of gas m 3 /t of coal raised is . . . . . . . .