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Miners Day
A miner is a person who extracts ore, coal, chalk, clay, or other minerals from the earth through mining. There are two senses in which the term is used. In its narrowest sense, a miner is someone who works at the rock face; cutting, blasting, or otherwise working and removing the rock. In a broader sense, a "miner" is anyone working within a mine, not just a worker at the rock face. Mining is one of the most dangerous trades in the world. In some countries, miners lack social guarantees and in case of injury may be left to cope without assistance. In regions with a long mining tradition, many communities have developed cultural traditions and aspects specific to the various regions, in the forms of particular equipment, symbolism, music, and the like. Roles Different functions of the individual miner. Many of the roles are specific to a type of mining, such as coal mining. Roles considered to be "miners" in the narrower sense have included: * Hewer (also known as "cake ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trepča Mines
The Trepča Mines ( al, Miniera e Trepçës, sr, Рудник Трепча / ''Rudnik Trepča'') is a large industrial complex in Kosovo, located northeast of Mitrovica. The mine is located on the southern slopes of the Kopaonik mountain, between the peaks of Crni Vrh () and Majdan , and it is Europe's largest lead-zinc and silver ore mine. With up to 23,000 employees, Trepča was once one of the biggest companies in Yugoslavia. In the 1930s, the Selection Trust gained the rights to exploit the Stari Trg mine close to Mitrovica. After World War II, under socialist management, the company further expanded. Overview The enterprise known as Trepča was a conglomerate of 40 mines and factories, located mostly in Kosovo but also in locations in Montenegro. But the heart of its operations, and the source of most of its raw material, is the vast mining complex to the east of Mitrovica in the north of Kosovo, famous since Roman times. However, with the closure of several mines ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Winding Engine
A winding engine is a stationary engine used to control a cable, for example to power a mining hoist at a pit head. Electric hoist controllers have replaced proper winding engines in modern mining, but use electric motors that are also traditionally referred to as ''winding engines''. Early winding engines were hand, or more usually horse powered. The first powered winding engines were stationary steam engines. The demand for winding engines was one factor that drove James Watt to develop his rotative beam engine, with its ability continuously to turn a winding drum, rather than the early reciprocating beam engines that were only useful for working pumps. They differ from most other stationary steam engines in that, like a steam locomotive, they need to be able to stop frequently and also reverse. This requires more complex valve gear and other controls than are needed on engines used in mills or to drive pump A pump is a device that moves fluids (liquids or gases), or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silver Valley (Idaho)
The Silver Valley is a region in the northwest United States, in the Coeur d'Alene Mountains in northern Idaho. It is noted for its mining heritage, dating back to the 1880s. Geography Silver Valley is a narrow valley about in length, east of the city of Coeur d'Alene. The South Fork of the Coeur d'Alene River flows through the valley and Interstate 90 traverses the valley between Fourth of July Pass to the west and Lookout Pass on the Montana border. Several towns are located in the valley, all in Shoshone County. These include (from west to east) Pinehurst, Smelterville, Kellogg, Wardner, Osburn, Silverton, Wallace, and Mullan. The Silver Valley has also been referred to as the Coeur d'Alene Valley and the Coeur d'Alene Mining District. Geology The Coeur d'Alene (Silver Valley) Mining District is located in Proterozoic metasediments. The mined portion of the stratigraphic column in the Silver Valley, known as the Belt series, can be divided into six main for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mursko Središće
Mursko Središće ( hu, Muraszerdahely, Kajkavian: ''Mursko Središče'') is the northernmost town in Croatia, located at ( alt. 175 m) and one of the oldest localities in Međimurje County. Mursko Središće has a total population of 6,307, and an area of . It lies on the river Mura, the natural line dividing Croatia from Slovenia. Nearby places are Čakovec, Sveti Martin na Muri, Lendava, and Podturen. History Mursko Središće is first mentioned in 1334 as ''Sancti Martini in Zredysche''. Historian Ivan Kukuljević-Sakcinski claimed that the site was occupied by the Romans and was known under the name of ''Helicanum''. If true, it would have been a strategic point on the road between Ptuj ( Poetovio) in Slovenia and Carnuntum (Petronell) on the river Danube, the post between today's Vienna and Bratislava in Slovakia. The existing road was built in the 1st century. Other historians disagree, claiming that Helicanum might be today's Sveti Martin na Muri or nearby Lendava ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
West Virginia
West Virginia is a state in the Appalachian, Mid-Atlantic and Southeastern regions of the United States.The Census Bureau and the Association of American Geographers classify West Virginia as part of the Southern United States while the Bureau of Labor Statistics classifies the state as a part of the Mid-Atlantic regionMid-Atlantic Home : Mid-Atlantic Information Office: U.S. Bureau of Labor Statistics" www.bls.gov. Archived. It is bordered by Pennsylvania to the north and east, Maryland to the east and northeast, Virginia to the southeast, Kentucky to the southwest, and Ohio to the northwest. West Virginia is the 10th-smallest state by area and ranks as the 12th-least populous state, with a population of 1,793,716 residents. The capital and largest city is Charleston. West Virginia was admitted to the Union on June 20, 1863, and was a key border state during the American Civil War. It was the only state to form by separating from a Confederate state, the second to sepa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rockdust
Rock dust is a pulverized rock, usually limestone, sprayed on walls inside underground coal mines to prevent coal dust explosions. The dust acts as a heat sink, keeps coal dust levels down, and also prevents the incidence of black lung disease. Rock dust has been used since the early 1900s, but there have been technological improvements since then. U.S. federal regulations require that rock dust be applied in all underground areas of a coal mine to mitigate the propagation of a coal dust explosion. Prior to September 2010, U.S. federal regulation mandated that the nation’s coal mines maintain a total incombustible content (TIC) of at least 65% in nonreturn entries and at least 80% in the return airways. In September 2010, the U.S. Mine Safety and Heath Administration (MSHA) published an emergency temporary standard increasing the total incombustible requirement in intake airways to 80%, effective June 21, 2011. The 65% TIC requirement was based on an average particle size te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Potosí
Potosí, known as Villa Imperial de Potosí in the colonial period, is the capital city and a municipality of the Department of Potosí in Bolivia. It is one of the highest cities in the world at a nominal . For centuries, it was the location of the Spanish colonial silver mint. A considerable amount of the city's colonial architecture has been preserved in the historic center of the city, which - along with the globally important Cerro Rico de Potosí - are part of a designated UNESCO World Heritage Site. Potosí lies at the foot of the ''Cerro de Potosí'' —sometimes referred to as the ''Cerro Rico'' ("rich mountain")— a mountain popularly conceived of as being "made of" silver ore that dominates the city. The Cerro Rico is the reason for Potosí's historical importance since it was the major supply of silver for the Spanish Empire until Guanajuato in Mexico surpassed it in the 18th century. The silver was taken by llama and mule train to the Pacific coast, shipped north ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brown Coal
Lignite, often referred to as brown coal, is a soft, brown, combustible, sedimentary rock formed from naturally compressed peat. It has a carbon content around 25–35%, and is considered the lowest rank of coal due to its relatively low heat content. When removed from the ground, it contains a very high amount of moisture which partially explains its low carbon content. Lignite is mined all around the world and is used almost exclusively as a fuel for steam-electric power generation. The combustion of lignite produces less heat for the amount of carbon dioxide and sulfur released than other ranks of coal. As a result, environmental advocates have characterized lignite as the most harmful coal to human health. Depending on the source, various toxic heavy metals, including naturally occurring radioactive materials may be present in lignite which are left over in the coal fly ash produced from its combustion, further increasing health risks. Characteristics Lignite is brown ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
East Germany
East Germany, officially the German Democratic Republic (GDR; german: Deutsche Demokratische Republik, , DDR, ), was a country that existed from its creation on 7 October 1949 until its dissolution on 3 October 1990. In these years the state was a part of the Eastern Bloc in the Cold War. Commonly described as a communist state, it described itself as a socialist "workers' and peasants' state".Patrick Major, Jonathan Osmond, ''The Workers' and Peasants' State: Communism and Society in East Germany Under Ulbricht 1945–71'', Manchester University Press, 2002, Its territory was administered and occupied by Soviet forces following the end of World War II—the Soviet occupation zone of the Potsdam Agreement, bounded on the east by the Oder–Neisse line. The Soviet zone surrounded West Berlin but did not include it and West Berlin remained outside the jurisdiction of the GDR. Most scholars and academics describe the GDR as a totalitarian dictatorship. The GDR was establish ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Senftenberg
Senftenberg ( wen, Zły Komorow) is a town in Lower Lusatia, Brandenburg, Germany, capital of the Oberspreewald-Lausitz district. Geography Senftenberg is located in the southwest of the historic Lower Lusatia region at the border with Saxony. Its town centre is situated north of the river Black Elster and the artificial Senftenberger Lake, part of the Lusatian Lake District chain, approximately northwest of Hoyerswerda, and southwest of Cottbus. Senftenberg station is north of the centre and a major railway freight yard is located to its north-east, with a locomotive depot. History Senftenberg was first mentioned in a 1279 deed issued by Henry III the Illustrious of Wettin, then margrave of Lusatia. With Lower Lusatia, the settlement was acquired by the Kingdom of Bohemia under Charles IV of Luxembourg in 1368. Elector Frederick II of Saxony acquired Senftenberg in 1448, whereafter the area as a border stronghold of the House of Wettin was separated from Bohemian Lusatia, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Power
Electric power is the rate at which electrical energy is transferred by an electric circuit. The SI unit of power is the watt, one joule per second. Standard prefixes apply to watts as with other SI units: thousands, millions and billions of watts are called kilowatts, megawatts and gigawatts respectively. A common misconception is that electric power is bought and sold, but actually electrical energy is bought and sold. For example, electricity is sold to consumers in kilowatt-hours (kilowatts multiplied by hours), because energy is power multiplied by time. Electric power is usually produced by electric generators, but can also be supplied by sources such as electric batteries. It is usually supplied to businesses and homes (as domestic mains electricity) by the electric power industry through an electrical grid. Electric power can be delivered over long distances by transmission lines and used for applications such as motion, light or heat with high efficiency. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
