In longwall advance workings, nearly . . . . . . . . te of sand per te of coal raised is required.
A. 1.4
B. 1.8
C. 1.3
D. 2.5
Answer: Option A
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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C. 1100 l
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