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Show Mines
A mine, i.e. an industrial facility for the underground extraction of mineral commodities, has three operating phases: it may be open or running, or closed or it may be a working museum. Most mines are simply closed once they are no longer productive. For safety they are usually partially destroyed (filled in). However, many mines are at least partially accessible today to visitors. In such cases they may be referred to as show mines or visitor mines if the focus is mainly on visiting the former mine, or mining museums if the mine only forms part of a museum. Most show mines have been set up in abandoned mines. In recent decades, however, they are often established immediately after mining ceases, creating some jobs funded at least partially by cultural tourism. Overview A show mine is often just a small part of a much larger mining facility that is developed, secured and provided with educational exhibits and installations. Such mines are usually equipped with fixed electrical li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thuringia Merkers Mines Asv2020-07 Img02
Thuringia (; german: Thüringen ), officially the Free State of Thuringia ( ), is a state of central Germany, covering , the sixth smallest of the sixteen German states. It has a population of about 2.1 million. Erfurt is the capital and largest city. Other cities are Jena, Gera and Weimar. Thuringia is bordered by Bavaria, Hesse, Lower Saxony, Saxony-Anhalt, and Saxony. It has been known as "the green heart of Germany" () from the late 19th century due to its broad, dense forest. Most of Thuringia is in the Saale drainage basin, a left-bank tributary of the Elbe. Thuringia is home to the Rennsteig, Germany's best-known hiking trail. Its winter resort of Oberhof makes it a well-equipped winter sports destination – half of Germany's 136 Winter Olympic gold medals had been won by Thuringian athletes as of 2014. Thuringia was favoured by or was the birthplace of three key intellectuals and leaders in the arts: Johann Sebastian Bach, Johann Wolfgang von Goethe, and Friedri ... [...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 desired materials, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Commodities
In economics, a commodity is an economic good, usually a resource, that has full or substantial fungibility: that is, the market treats instances of the good as equivalent or nearly so with no regard to who produced them. The price of a commodity good is typically determined as a function of its market as a whole: well-established physical commodities have actively traded spot and derivative markets. The wide availability of commodities typically leads to smaller profit margins and diminishes the importance of factors (such as brand name) other than price. Most commodities are raw materials, basic resources, agricultural, or mining products, such as iron ore, sugar, or grains like rice and wheat. Commodities can also be mass-produced unspecialized products such as chemicals and computer memory. Popular commodities include crude oil, corn, and gold. Other definitions of commodity include something useful or valued and an alternative term for an economic good or service avail ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miners' Lamp
The Davy lamp is a safety lamp for use in flammable atmospheres, invented in 1815 by Sir Humphry Davy.Brief History of the Miner's Flame Safety Lamp at minerslamps.net. Accessed 7 July 20121 It consists of a lamp with the flame enclosed inside a mesh screen. It was created for use in s, to reduce the danger of explosions due to the presence of and other flammable gases, called '' |
Pit Railway
A mine railway (or mine railroad, U.S.), sometimes pit railway, is a railway constructed to carry materials and workers in and out of a mine. Materials transported typically include ore, coal and overburden (also called variously spoils, waste, slack, culm, and tilings; all meaning waste rock). It is little remembered, but the mix of heavy and bulky materials which had to be hauled into and out of mines gave rise to the first several generations of railways, at first made of wooden rails, but eventually adding protective iron, steam locomotion by fixed engines and the earliest commercial steam locomotives, all in and around the works around mines. History Mine rails Wagonways (or tramways) were developed in Germany in the 1550s to facilitate the transport of ore tubs to and from mines, using primitive wooden rails. Such an operation was illustrated in 1556 by Georgius Agricola of Germany (Image right). This used "Hund" carts with unflanged wheels running on wooden planks an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hoist (mining)
In underground mining a hoist or winder is used to raise and lower conveyances within the mine shaft. Modern hoists are normally powered using electric motors, historically with direct current drives utilizing Ward Leonard control machines and later solid-state converters (thyristors), however modern large hoists use alternating current drives that are variable frequency controlled. There are three principal types of hoists used in mining applications: Drum hoist Drum hoists are the most common type of hoist used in North America, South Africa and South America. When using a drum hoist the hoisting cable is wound around the drum when the conveyance is lifted. Single-drum hoists can be used in smaller applications, however double-drum hoists easily allow the hoisting of two conveyances in balance (i.e. one skip being lifted while a second skip is being lowered). Drum hoists are mounted on concrete slabs within a hoistroom, the hoisting ropes run from the drum, up to the top ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lassing Mining Disaster
The mining disaster at Lassing occurred the morning of 17 July 1998. The accident in the Upper Styrian municipality of Lassing was the worst of its kind in Austria since 1945. Geological and historic background Lassing is the largest known carbonated talc deposit in the Eastern Alps. Geologically, it is part of the northern greywacke zone in Upper Styria. The deposit consists of two fields, the North and South Field, that latter having no connexion to the surface of the terrain. It is covered by unconsolidated rock, about 60 metres thick. Lassing talc was discovered in 1891 by the local landowner, Krennmoar, during construction work. He secured the mining rights. In 1901, the firm of Bischetsrieder & Gielow began underground extraction. In the mid-1920s, mining was suspended for a few years due to the bankruptcy of the owner. In 1939, the mine was acquired by the family firm of ''Talkumwerke Naintsch''. In 1988 the pit went into the possession of the Rio Tinto Group. In the 199 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
German Mining Museum
The German Mining Museum in Bochum (german: Deutsches Bergbau-Museum Bochum) or DBM is one of the most visited museums in Germany with around 365,700 visitors per year (2012).Auskunft der Pressestelle des DBM, 12 September 2013 It is the largest mining museum in the world, (retrieved 12 September 2013) and a renowned for mining history. Above-ground exhibitions, and a faithfully reconstructed show mine below the museum terrain give visitors insights into the world of |
Show Mines
A mine, i.e. an industrial facility for the underground extraction of mineral commodities, has three operating phases: it may be open or running, or closed or it may be a working museum. Most mines are simply closed once they are no longer productive. For safety they are usually partially destroyed (filled in). However, many mines are at least partially accessible today to visitors. In such cases they may be referred to as show mines or visitor mines if the focus is mainly on visiting the former mine, or mining museums if the mine only forms part of a museum. Most show mines have been set up in abandoned mines. In recent decades, however, they are often established immediately after mining ceases, creating some jobs funded at least partially by cultural tourism. Overview A show mine is often just a small part of a much larger mining facility that is developed, secured and provided with educational exhibits and installations. Such mines are usually equipped with fixed electrical li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
