Introduction To Mining Engineering - Study Mode
[#171] In hydraulic mining the coal pulp is carried by
Correct Answer
(A) flumes
[#172] In a drift of 2.4 m × 3.0 m size, the pull obtained per blast is 1.8 m. the total explosives consumed per blast is 36 kg. If the tonnage factor is 0.36 m 3 /te, the powder factor is
Correct Answer
(B) 1.0 kg/te
[#173] Which of the following statement is true for long wall mining?
Correct Answer
(B) maximum tensile stress remains at the centre of gob
[#174] Total number of injuries in an opencast coal mine employing 800 persons is 16 in a year. As per DGMS norms, the injury rate per 1000 persons employed is
Correct Answer
(C) 20
[#175] First generation powered support is
Correct Answer
(C) frame