depth of mining
41Super Pit gold mine — Super Pit gold mine …
42безпечна глибина розробки — безопасная глубина разработки safe depth for mining Sicherheitstiefe für Bergarbeit глибина гірничих робіт, при якій і нижче якої деформації земної поверхні в результаті підробки дорівнюють або менші допустимих для підроблюваного об’єкта. Нижче… …
43Kent coalfield — The Kent coalfield was located in the eastern part of the English county of Kent.Coal was discovered in the area in 1890 while borings for an early Channel Tunnel project were taking place and the resultant Shakespeare colliery lasted until 1915 …
44Naval mine — Polish wz. 08/39 contact mine. The protuberances around the top of the mine, called Hertz horns, are part of the detonation mechanism …
45Orex Exploration — Inc. Type Public (TSX V: OX) Industry Mining Founded 1987 …
46Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …
47tunnels and underground excavations — ▪ engineering Introduction Great tunnels of the world Great tunnels of the worldhorizontal underground passageway produced by excavation or occasionally by nature s action in dissolving a soluble rock, such as limestone. A vertical opening …
48coal — coalless, adj. /kohl/, n. 1. a black or dark brown combustible mineral substance consisting of carbonized vegetable matter, used as a fuel. Cf. anthracite, bituminous coal, lignite. 2. a piece of glowing, charred, or burned wood or other… …
49Diamond — This article is about the mineral. For the gemstone, see Diamond (gemstone). For other uses, including the shape ◊, see Diamond (disambiguation) …
50Comstock Lode — Bonanza ore, Consolidated California and Virginia Mine, Comstock Lode The Comstock Lode was the first major U.S. discovery of silver ore, located under what is now Virginia City, Nevada, on the eastern slope of Mount Davidson, a peak in the… …
