Introduction To Mining Engineering - Study Mode
[#336] Square pillars in B & P panel are of size 30 m centre to centre and the galleries are of width 4 m. The tributary area for each pillar in m 2 is
Correct Answer
(A) 224
[#337] Which of the following faces are not permitted to run in B & P district?
Correct Answer
(B) rise face of top heading and dip face of bottom most heading
[#338] The full form of 'RMR' is
Correct Answer
(C) rock mass rating
[#339] In a 2 nd degree gassy mine the velocity of air measured at the maximum span of long wall face should be
Correct Answer
(D) 60 m/min
[#340] The equipment that is NOT used in hard rock metal mining drivage is
Correct Answer
(D) dint header