underground workings

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• Underground mine ventilation — Schematic of underground mine ventilation Underground mine ventilation provides a flow of air to the underground workings of a mine of sufficient volume to dilute and remove noxious gases (typically NOx, SO2, methane, CO2 and CO). The source of …   Wikipedia

• Underground mining (hard rock) — A three dimensional model of an underground mine with shaft access Underground hard rock mining refers to various underground mining techniques used to excavate hard minerals, mainly those containing metals[1] such as ore containing gold …   Wikipedia

• Underground (documentary film) — Infobox Film name = Underground |thumb image size = 200px caption = imdb id = 0075367 writer = starring = Bill Ayers Kathy Boudin Emile de Antonio Bernadine Dohrn Jeff Jones Mary Lampson Haskell Wexler Kathy Wilkerson directors = Emile de Antonio …   Wikipedia

• London Underground electric locomotives — Manufacturer Stock type Deep level tube …   Wikipedia

• Dolaucothi Gold Mines — The Dolaucothi Gold Mines (grid reference SN662403), also known as the Ogofau Gold Mine, are Roman surface and deep mines located in the valley of the River Cothi, near Pumsaint, Carmarthenshire, Wales. The gold mines are located within the… …   Wikipedia

• Slate industry — The slate industry is the industry related to the extraction and processing of slate. Slate is either quarried from a slate quarry or reached by tunneling in a slate mine . Common uses for slate include as a roofing material, a flooring material… …   Wikipedia

• Gold mining in Alaska — Gold mining in Alaska, a state of the United States, has been a major industry and impetus for exploration and settlement since a few years after the United States acquired the territory from Russia. Russian explorers discovered placer gold in… …   Wikipedia

• Fire-setting — A method of mining, fires were set against a rock face to break the rock by thermal shock after dousing with water. Best performed in opencast mines, where the smoke and fumes could be dissipated safely, the technique was very dangerous in… …   Wikipedia

• Orex Exploration — Inc. Type Public (TSX V: OX) Industry Mining Founded 1987 …   Wikipedia

• US Silver — Corporation (Tsxv|USA) is a mining company based in Wallace, Idaho near Coeur d Alene, Idaho. The Chairman of the Company is John P. Ryan, the CEO is Bruce Reid, and the President is Mark Hartmann.In 2006 USSC purchased the Coeur, Caladay, and… …   Wikipedia

• Dartmoor tin-mining — The wheelpit at Huntingdon mine The Dartmoor tin mining industry is thought to have originated in pre Roman times,[1] and continued right through to the 20th century. From the 12th century onwards tin mining was regulated by a Stannary Parliament …   Wikipedia