drainage for shaft-sinking
1Shaft construction — concerns the building of vertical openings such as Raises and Shafts. Shafts are vertical openings used for supplying equipment, personnel, and support systems to the horizontal tunnel where the pipeline is installed. They can be temporary or… …
2tunnels 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 …
3Mining in the Upper Harz — The headframe of the Emperor William Shaft in Clausthal is one of the oldest surviving winding towers in Germany …
4Zollverein Coal Mine Industrial Complex — Infobox World Heritage Site Name = Zollverein Coal Mine Industrial Complex in Essen State Party = GER Type = Cultural Criteria = II. III. ID = 975 Region = Europe and North America Year = 2001 Session = 25th Link =… …
5mining — /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… …
6Consolidation Coal Company (Iowa) — For the much larger company that operated under the same name in the eastern United States, see Consol Energy. The Consolidation Coal Company was created in 1875 and purchased by the Chicago and North Western Railroad in 1880 in order to provide… …
7cave — cavelike, adj. /kayv/, n., v., caved, caving. n. 1. a hollow in the earth, esp. one opening more or less horizontally into a hill, mountain, etc. 2. a storage cellar, esp. for wine. 3. Eng. Hist. a secession, or a group of seceders, from a… …
8Europe, history of — Introduction history of European peoples and cultures from prehistoric times to the present. Europe is a more ambiguous term than most geographic expressions. Its etymology is doubtful, as is the physical extent of the area it designates.… …
9Business and Industry Review — ▪ 1999 Introduction Overview Annual Average Rates of Growth of Manufacturing Output, 1980 97, Table Pattern of Output, 1994 97, Table Index Numbers of Production, Employment, and Productivity in Manufacturing Industries, Table (For Annual… …
10Thames Tunnel — The Thames Tunnel is an underwater tunnel, built beneath the River Thames in London. 35 feet wide (11 m), 20 feet (6 m) high and 1,300 feet (396 m) long, it runs between Rotherhithe and Wapping at a depth of 75 feet (23 m) below the river s… …
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