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Definition of pillar-and-stall i A system of working coal and other minerals where the first stage of excavation is accomplished with the roof sustained by coal or ore...
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Definition of pillar-and-stall - mindatorg glossary i A system of working coal and other minerals where the first stage of excavation is accomplished with the roof sustained by coal or ore See Also: pillar-and-breast, post-and-stall ii One of the earliest methods of working coal seams ...
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