A hole 1.2 - 1.5 m deep may require . . . . . . . . of explosive charge
A. 0.1 - 0.3 Kg
B. 0.3 - 0.5 Kg
C. 0.6 - 0.9 Kg
D. 0.9 - 1.2 Kg
Answer: Option C
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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