Mining Engineering > GATE 2023 > Underground Coal Mining
'Critical subsidence has occurred on the surface due to mining of a flat longwall panel at a depth of 200 m. The width of the panel is 150 m. The maximum width of the panel in m that can be mined at a depth of 300 m, to reach critical subsidence is ________[rounded off to 1 decimal place]
Correct : 100.0
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