Q. Exposure of weak roof in junctions of a development district in a coal mine can be decreased by
(A) increasing dimension of panel barrier
(B) stitching side walls
(C) increasing support density at junctions
(D) staggering the junctions
Q. Exposure of weak roof in junctions of a development district in a coal mine can be decreased by
(A) increasing dimension of panel barrier
(B) stitching side walls
(C) increasing support density at junctions
(D) staggering the junctions
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