work an adit

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• Great County Adit — The Great County Adit, sometimes called the County Adit, or the Great Adit was a system of interconnected adits that helped drain water from the tin and copper mines in the Gwennap area of Cornwall, in the United Kingdom. Construction started in… …   Wikipedia

• Monte Cristo Gold Mine — Coordinates: 34°21′N 118°05′W / 34.35°N 118.08°W / 34.35; 118.08 The Monte Cristo Gold Mine (Spanish for Mountain of Christ Gold Mi …   Wikipedia

• tunnels 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 …   Universalium

• Book Cliff mines — The Book Cliff Mines were coal mines located near Grand Junction, Colorado. They closed in 1925.History and DescriptionBy the time Grand Junction was three years old it had become apparent to its citizens that they needed a good coal supply if… …   Wikipedia

• South Crofty — s.HistorySouth Crofty Mine, at Pool between Camborne and Redruth, is an ancient tin mine. For several centuries its shallow workings exploited copper rather than the deeper tin mineralisation. References implying mining, rather than streaming,… …   Wikipedia

• Derbyshire lead mining history — Goodluck Mine in Via Gellia. This article details some of the history of lead mining in Derbyshire, England. Contents 1 …   Wikipedia

• mining — /muy ning/, n. 1. the act, process, or industry of extracting ores, coal, etc., from mines. 2. the laying of explosive mines. [1250 1300; ME: undermining (walls in an attack); see MINE2, ING1] * * * I Excavation of materials from the Earth s… …   Universalium

• Heading — Head ing, n. 1. The act or state of one who, or that which, heads; formation of a head. [1913 Webster] 2. That which stands at the head; title; as, the heading of a paper. [1913 Webster] 3. Material for the heads of casks, barrels, etc. [1913… …   The Collaborative International Dictionary of English

• Heading course — Heading Head ing, n. 1. The act or state of one who, or that which, heads; formation of a head. [1913 Webster] 2. That which stands at the head; title; as, the heading of a paper. [1913 Webster] 3. Material for the heads of casks, barrels, etc.… …   The Collaborative International Dictionary of English

• Heading joint — Heading Head ing, n. 1. The act or state of one who, or that which, heads; formation of a head. [1913 Webster] 2. That which stands at the head; title; as, the heading of a paper. [1913 Webster] 3. Material for the heads of casks, barrels, etc.… …   The Collaborative International Dictionary of English

• 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