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Related to open-pit mining: Underground mining
open-pit mining[¦ō·pən ¦pit ′mīn·iŋ]
Extracting metal ores and minerals that lie near the surface by removing the overlying material and breaking and loading the ore. Also known as open-cast mining; opencut mining.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.