longwall

/lawng"wawl', long"-/, adj. Mining.
1. noting or pertaining to a means of extracting coal or other minerals in an underground mine from a continuous face, the roof before the face being supported at intervals by temporary or movable artificial supports. Cf. room-and-pillar.
n.
2. the continuous face so worked.
[1830-40; LONG1 + WALL]

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Universalium. 2010.

Look at other dictionaries:

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