If the strength of the roof is weak, unsupported, ore is massive and steep, the method employed is . . . . . . . .
A. Cut and fill
B. Block caving
C. Room and pillar
D. All
Answer: Option B
This Question Belongs to Mining Engineering >> Metal Mining
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The ore loaded in shrinkage stoping by . . . . . . . .
A. Over head mucker
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A. More
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