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define mining. mining synonyms, mining pronunciation, mining translation, english dictionary definition of mining. n. 1. the process or business of extracting ore or minerals from the ground.
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mining definition, meaning, what is mining: the industry or activity of removing substances such as coal or metal from the ground by. learn more.
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underground coal mines. subpart ff underground coal mines §98.320 definition of the source category. (a) this source category consists of active underground coal mines, and any underground mines under development that have operational pre mining degasification systems.
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