If the depth of seam exceeding 240 meters but not exceeding 360 m, the width of the galleries does not exceed 4.8 m, the distance between centres of adjacent pillar shall not be less than . . . . . . . .
A. 45
B. 39.5
C. 48
D. 28.5
Answer: Option A
This Question Belongs to Mining Engineering >> Mine Legislation And General Safety
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