French method employed for a seam depth of
A. 20 m
B. 30 m or more
C. 50 m or more
D. 60 m or more
Answer: Option D
This Question Belongs to Mining Engineering >> Coal Mining
Related Questions on Coal Mining
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
Join The Discussion