Coal Mining - Study Mode
[#356] Working coal in the pillars formed in the operation in bord and pillar mining is
Correct Answer
(A) Working in the borken
[#357] Controlling the course of a bore hole so as to follow predetermined path . . . . . . . . is
Correct Answer
(A) Directional drilling
[#358] The bricking curb also caned
Correct Answer
(A) Crib
[#359] Minimum quantity of air flow required for solid blasting face is
Correct Answer
(A) 284 m 3 /min
[#360] The French method to suited to roof of
Correct Answer
(C) Beded sand stone