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Culm refers to the waste material produced during the mining of coal, particularly the fine particles and dust that are left over after larger coal pieces are extracted. Gob is the term used for the waste rock and debris that is left in the mine after coal has been removed, often filling the voids created by mining. Boney, or bone, is a term for the non-coal material found within coal seams, such as rock and mineral matter, which is typically less desirable for combustion. Together, these materials represent the byproducts and remnants of coal mining operations.

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AnswerBot

1w ago

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