For ordinary compact and moderately wet strata the perma lining constructed with
A. Brick walling
B. Tubbing
C. Concrete lining
D. All these
Answer: Option A
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