longwall system

noun

Definition of longwall system

: a method of coal mining in which the working face extends entirely across the seam, the work proceeds either away from or toward the main shaft, and the roof is allowed to cave in behind the workers

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History and Etymology for longwall system

longwall from long entry 1 + wall

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Cite this Entry

“Longwall system.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/longwall%20system. Accessed 15 Aug. 2020.

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