Coal Mining - Study Mode
[#431] While working seams steeper than 1 in 4 except the haulage dip the cross connections between the levels should be
Correct Answer
(C) Staggered
[#432] Diamond drilling is applicable upto a maximum depth of . . . . . . . . m.
Correct Answer
(C) 3000
[#433] In deciding the size of the panel the important factor to be considered is
Correct Answer
(D) Depth of seam
[#434] The collapse of roof in the goaf which is delibarately brought about by withdrawal of roof supports called
Correct Answer
(A) Normal Collapse
[#435] Room and pillar method used, when
Correct Answer
(A) Ory body is flat to smell dipping and at shallow depth