For retreating L/W and B. P workings, only suitable method of methane drainage is
A. Pack cavity method
B. Cross measure bore hole method
C. Hirch back method
D. None
Answer: Option C
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
Scaffold not required in . . . . . . . . tubbing
A. Over hung tubby
B. Under hung
C. Brick
D. Concrete
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