The operation of tracing of broken and lost parts in the hole and withdrawn to the surface
A. Lining of bore hole
B. Drilling
C. Bore hole survey
D. Fishing the bore hole
Answer: Option D
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 . . . . . . . .
A. 800 l
B. 600 l
C. 1100 l
D. 1200 l
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