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Longwall Mining Method Ppt

Pramod thakur ph.D., in advanced mine ventilation, 2019.Abstract.Longwall mining or coal pillar extraction by any other method causes the roof to subside and the floor to heave.The gas emission space created by such coal extraction can extend 1000 ft above and 250 ft below the working seam depending on the width of the panel.Any coal seam contained in the gas emission space will.

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