society > occupation and work > workplace > places where raw materials are extracted > mine > [noun] > working face or place > in coal mine (6)
Coal Mining. (See quot. 1883.)
Mining. A coalface. Obsolete.
In a coal mine: an exposed surface of coal at which mining is carried out; cf. face, n. 22a. Also by metonymy: the mining industry.
Miscellaneous technical senses. Mining. (See quots.)