Gallaries which are heightend, widended should be supported by row of props . . . . . . . . meter aparts and chocks . . . . . . . . meter apart.
A. 1.2, 3
B. 1.5, 3
C. 1.8, 3
D. 1.2, 2.5
Answer: Option A
This Question Belongs to Mining Engineering >> Coal Mining
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