The pillar which is left for support of upper level during extraction called . . . . . . . .
A. Rib
B. Crown
C. Sill
D. Rise
Answer: Option B
This Question Belongs to Mining Engineering >> Metal Mining
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A. Chip sampling
B. Channel
C. Bulk
D. Radio metre
The ore loaded in shrinkage stoping by . . . . . . . .
A. Over head mucker
B. Pneumatic Auto Loader
C. LHD
D. None
If the ore body is thicker, the level interval will be . . . . . . . .
A. More
B. Lessor
C. Stronger
D. Weaker
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