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Rösche
A ''Rösche'' is a German mining term that refers ''inter alia'' to a gullet (''Wasserseige''), a trench for draining water in the lower part of a mine gallery An adit (from Latin ''aditus'', entrance) is an entrance to an underground mine which is horizontal or nearly horizontal, by which the mine can be entered, drained of water, ventilated, and minerals extracted at the lowest convenient level. Adit .... In order to keep the actual gallery entrance (''Stollenmundloch'') free and guard against backflooding the ''Röschen'' were, in many cases, extended to below the entrance or led even further away, underground, to the nearest stream or river. By contrast the term ''Rösche'' was also used to describe the channels or "leats" through which the driving water for mining equipment was led into the pit (''Aufschlagrösche'' or driving water leats) or out of the pit (''Abfallrösche'' or drainage leats). Unlike a gallery, a leat will have a gentle incline into the pit. Also refer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Upper Harz Water Tunnels
The Upper Harz Water Tunnels (german: Oberharzer Wasserläufe, ) are part of the Upper Harz Water Regale - a network of Kunstteich, reservoirs, Kunstgraben, ditches, tunnels and other structures in the Harz mountains of central Germany (geography), central Germany. The German term ''Wasserlauf'' refers to the underground element (i.e. the tunnels) of the network of watercourses used in the historic silver mining industry of the Upper Harz. This network of ditches and tunnels was used to supply the mines with headrace waters for their water wheels from the 16th century onwards. In the system of the Upper Harz Water Regale there are over 35 such tunnels with a total length of about . Construction Although explosives were already in use in the 17th century in the mines of the Upper Harz, tunnels continued to be hewn out by hand, that is with hammer and chisel (tools), hammer and chisel for much longer. The reason was that there were difficulties in determining the right amount of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kunstgraben
A ''Kunstgraben'' is a type of man-made water channel that was once used by mines to drive the water wheels needed for power, mine drainage and a host of other purposes. The term is German (plural: ''Kunstgräben''). Similar ditches supplying water mills in England are called leats. Background Until the invention of the steam engine, water power was the main source of energy utilised by the various mechanical engines employed in the mining industry, such as water wheels, reversible water wheels, water-column engines or water turbines. To enable mine workings to be driven ever deeper, more and more power was needed. The water available in the vicinity of the pits was insufficient for that purpose and springs frequently dried up as a result of be diverted for use in the mines. As a result, the water needed for the mine workings sometimes had to be transported over long distances. Usage The aim was to have the greatest possible height difference at the site of the water po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grube Idria
Grube is a municipality in the district of Ostholstein, in Schleswig-Holstein, Germany. It is situated near the Baltic Sea coast, approx. 15 km south of Heiligenhafen, and 45 km northeast of Lübeck. Grube was the seat of the ''Amt Amt is a type of administrative division governing a group of municipalities, today only in Germany, but formerly also common in other countries of Northern Europe. Its size and functions differ by country and the term is roughly equivalent to ...'' ("collective municipality") Grube, which was disbanded in January 2007. It consisted of the following municipalities (population in 2005 between brackets): *Dahme (1176) *Grube * (1047) *Kellenhusen (1060) *Riepsdorf (1042) References Ostholstein {{Ostholstein-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mining
Mining is the extraction of valuable minerals or other geological materials from the Earth, usually from an ore body, lode, vein, seam, reef, or placer deposit. The exploitation of these deposits for raw material is based on the economic viability of investing in the equipment, labor, and energy required to extract, refine and transport the materials found at the mine to manufacturers who can use the material. Ores recovered by mining include metals, coal, oil shale, gemstones, limestone, chalk, dimension stone, rock salt, potash, gravel, and clay. Mining is required to obtain most materials that cannot be grown through agricultural processes, or feasibly created artificially in a laboratory or factory. Mining in a wider sense includes extraction of any non-renewable resource such as petroleum, natural gas, or even water. Modern mining processes involve prospecting for ore bodies, analysis of the profit potential of a proposed mine, extraction of the desire ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
