An excavation open to the surface. Also: a method of mining in which rock is removed progressively in horizontal layers from the surface downwards…
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| 单词 | θ211954 |
| 释义 | society > occupation and work > workplace > places where raw materials are extracted > mine > [noun] > surface works (8) 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… openwork1665 Mining. An excavation open to the surface; an opencast quarry. pit-heap1769 a heap of excavated material near the mouth of a mine shaft; (hence) the whole of the surface works of a coal mine (cf. heap-stead at heap, n.… grass work1828 Mining. The structures and buildings of a mine that are located above ground; usually in plural. Also: the work of a mine that is carried on above… paddock1852 Mining (chiefly Australian and New Zealand). An open excavation in a superficial deposit. Subcategories:— sides of (1) — height raised above ground (1) — damage done to surface by mining (1) |
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