In case of props employed for side supports, they should be set an angle of . . . . . . . . off the vertical, and feet well sunk in to the floor.
A. 10° - 12°
B. 5° - 12°
C. 14° - 20°
D. 21° - 26°
Answer: Option C
This Question Belongs to Mining Engineering >> Mine Supports And Strata Control
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