the operation of washing detrital deposits for metal, esp. tin; a place where this is done.
| 单词 | θ211864 |
| 释义 | society > occupation and work > workplace > places where raw materials are extracted > mine > [noun] > mine by type of operation (13) stream-work1586 the operation of washing detrital deposits for metal, esp. tin; a place where this is done. opencast?a1650 An excavation open to the surface. Also: a method of mining in which rock is removed progressively in horizontal layers from the surface downwards… lavatory1712 A place in which gold is obtained by washing with water to separate it from soil, gravel, etc.; = lavadero, n. Obsolete. lavadero1717 A place for washing gold ore. coffin1778 Mining. ‘An old open working (Cornwall). whole working1842 the extraction of coal from a seam not previously worked in any way; cf. sense B. 4. open cut1848 An excavation which is open to the surface; = opencast, n. dry- or wet-diggings1849 A place where digging is carried on, an excavation; in plural (sometimes treated as a singular) applied to mines, and especially to the gold-fields… river diggings1850 In plural. A gold or diamond digging situated in such a place. Cf. digging, n. 4. placer digging1851 placer working1867 drift mine1882 any mine reached by a drift (sense 15 above) from the surface. strip mine1934 a mine worked by strip-mining; also as v. transitive, to obtain or exploit by strip-mining. |
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