Mine Supports And Strata Control - Study Mode
[#136] Which roof is treacherous and most unreliable in mines.
Correct Answer
(B) shale
[#137] The support provides a continuous cover all along the face by canopies placed side by side called
Correct Answer
(C) Shield supports
[#138] Support system design based on RMR depends on the following.
Correct Answer
Depth of seam
[#139] Maximum heating value of coal depend on the percentage is
Correct Answer
(C) Carbon and hydrogen
[#140] The systamatic timbering rules framed by the
Correct Answer
(C) Mine manager