| 单词 | horizon mining |
| 释义 | > as lemmashorizon mining horizon mining n. a method of working inclined seams from approximately horizontal tunnels driven through the various strata to intersect the seams, there being several systems or ‘horizons’ of tunnels, one below another, connected by vertical shafts. ΘΚΠ society > occupation and work > industry > mining > [noun] > other specific types of mining shoading1778 nuggeting1852 placer mining1852 reefing1859 hydraulic mining1873 stripping1874 drift mining1877 gouging1877 hydraulicking1880 open-working1881 strip mining1935 horizon mining1947 roadheading1969 1947 Coal Nov. 16/3 Horizon mining is planned to cut out heavy dip haulages, replacing them with locomotives. 1953 Times 15 Aug. 2/3 The site of the second modern horizon-mining development of the west Wales coalfield. 1963 J. Sinclair Planning & Mechanized Drifting at Collieries viii. 163 Probably the most important decision in planning a horizon-mining project is the position of the horizons and the vertical interval between them. < as lemmas |
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