Introduction To Mining Engineering - Study Mode
[#316] Which of the following controls the magnitude and direction of the front abutment pressure for immediate roof in long wall working?
Correct Answer
(A) Young's Modulus
[#317] In a 3 rd degree gassy mine the velocity of air measured at 7.5 m out bye of the discharge end of an air pipe should be
Correct Answer
(A) 25 m/min
[#318] In depillaring operation major coal losses are from
Correct Answer
(D) coal left as ribs within the pillars
[#319] Continuous miner and shuttle car combination is NOT applicable in mining with
Correct Answer
(B) wangawilli system
[#320] The angle of draw in a trough subsidence helps in determining the
Correct Answer
(B) Extent of surface subsidence