The type of sinking employed in unstable friable strata with heavy rush of water
A. Cementation
B. Freezing
C. Piling
D. Cassoin
Answer: Option B
This Question Belongs to Mining Engineering >> Coal Mining
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The required water for 1 ton of sand in hydraulic sand stowing is . . . . . . . .
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B. 600 l
C. 1100 l
D. 1200 l
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