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Back — The roof or upper part in any underground mining cavity. Backfill — Mine waste or rock used to support the roof after coal removal. Barren — Said of rock or vein material containing no minerals of value, and of strata without coal, or containing coal in seams too thin to be workable.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research ..
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Batco Manufacturing was incorporated on June 1, 1992. Our goal is to provide grain-handling alternatives to conventional systems with a focus on gentle handling at a high capacity with low maintenance.
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