Coal Mining - Study Mode
[#156] Shock bumps occurs in
Correct Answer
(A) Strong massive strata
[#157] For adoption of hydraulic sand stowing, the availability of sand from rivers flowing near the collieres within . . . . . . . . Km.
Correct Answer
(B) 16
[#158] Controlling the course of bore hole to follow predetermined path and complete the hole at desired surface location called
Correct Answer
(A) Bore hole deflection
[#159] Length of rooms and room and pillar mining
Correct Answer
(B) 90 m
[#160] In B.G the entire operation of drilling, blasting takes about
Correct Answer
(B) 1.5 shafts