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Headframe
A headframe (also known as a gallows frame, winding tower, hoist frame,Ernst, Dr.-Ing. Richard (1989). ''Wörterbuch der Industriellen Technik'' (5th ed.). Wiesbaden: Oscar Brandstetter, 1989. pit frame, shafthead frame, headgear, headstock or poppethead) is the structural frame above an underground mine shaft so as to enable the hoisting of machinery, personnel, or materials. Design Modern headframes are built out of steel, concrete or a combination of both. Timber headframes are no longer used in industrialized countries, but are still used in developing nations. Conventionally steel headframes are used when a drum hoist is employed, and concrete headframes are built for friction hoists; however a steel headframe can be used with a friction hoist for shafts with a smaller capacity and depth. Steel headframes A steel headframe is less expensive than a concrete headframe; the tallest steel headframe measures 87 m. Steel headframes are more adaptable to modifications (ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shaft Mining
Shaft mining or shaft sinking is the action of excavating a mine shaft from the top down, where there is initially no access to the bottom. Shallow shafts, typically sunk for civil engineering projects, differ greatly in execution method from deep shafts, typically sunk for mining projects. Shaft sinking is one of the most difficult of all mine development methods: restricted space, gravity, groundwater and specialized procedures make the task quite formidable. Shafts may be sunk by conventional drill and blast or mechanised means. Historically, mine shaft sinking has been among the most dangerous of all the mining occupations and the preserve of mining contractors called sinkers. Today shaft sinking contractors are concentrated in Canada, Germany, China and South Africa. The modern shaft sinking industry is gradually shifting further towards greater mechanisation. Recent innovations in the form of full-face shaft boring (akin to a vertical tunnel boring machine) have shown ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Butte, Montana
Butte ( ) is a consolidated city-county and the county seat of Silver Bow County, Montana, United States. In 1977, the city and county governments consolidated to form the sole entity of Butte-Silver Bow. The city covers , and, according to the 2020 census, has a population of 34,494, making it Montana's fifth largest city. It is served by Bert Mooney Airport with airport code BTM. Established in 1864 as a mining camp in the northern Rocky Mountains on the Continental Divide, Butte experienced rapid development in the late-nineteenth century, and was Montana's first major industrial city. In its heyday between the late-nineteenth and early-twentieth centuries, it was one of the largest copper boomtowns in the American West. Employment opportunities in the mines attracted surges of Asian and European immigrants, particularly the Irish; as of 2017, Butte has the largest population of Irish Americans per capita of any city in the United States. Butte was also the site of vari ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Con Mine
The Con Mine (1938-2003) was the first gold mine developed in the Northwest Territories, Canada, just south of Yellowknife. The property was staked by Consolidated Mining and Smelting Company of Canada (Cominco) in September 1935 in response to the discovery of visible gold nearby; the name "Con" is an abbreviation of "Consolidated". The advent of winter prevented any prospecting from being conducted, but work in the summer of 1936 led to the discovery of numerous gold veins. The Con Mine entered production in 1938 and ceased operations in 2003. It has produced over of gold from 12,195,585 tons of ore processed. The mine was over deep. Owners of the mine have included Cominco (1938–1986), Nerco Minerals (1986–1993), Miramar Mining Corp. (1993–2008), and Newmont Mining Corp. (2008–present). Geologically, the Con Mine is located within the Kam Group which is part of the Yellowknife greenstone belt. Social history The first gold brick was poured on September 5, 193 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drum Hoist
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 t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Friction Hoists
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 t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yellowknife
Yellowknife (; Dogrib: ) is the capital, largest community, and only city in the Northwest Territories, Canada. It is on the northern shore of Great Slave Lake, about south of the Arctic Circle, on the west side of Yellowknife Bay near the outlet of the Yellowknife River. Yellowknife and its surrounding water bodies were named after a local Dene tribe, who were known as the "Copper Indians" or "Yellowknife Indians", today incorporated as the Yellowknives Dene First Nation. They traded tools made from copper deposits near the Arctic Coast. Its population, which is ethnically mixed, was 19,569 per the 2016 Canadian Census. Of the eleven official languages of the Northwest Territories, five are spoken in significant numbers in Yellowknife: Dene Suline, Dogrib, South and North Slavey, English, and French. In the Dogrib language, the city is known as ''Sǫǫ̀mbak’è'' (, "where the money is"). Modern Yellowknives members can be found in the adjoining, primarily Indigenou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cilfynydd RFC
Cilfynydd Rugby Football Club is a Welsh rugby union club based in Cilfynydd in Pontypridd, Wales. The club is a member of the Welsh Rugby Union. Club badge The Cilfynydd RFC badge consists of a yellow and black shield split into quarters. The four quarters each contain an icon symbolising the culture of Cilfynydd; the Old Bridge, Pontypridd, the Welsh flower, the daffodil, a coal mine winding tower and finally the Prince of Wales's feathers. Club honours *Glamorgan County Silver Ball Trophy 1983/84 - Winners *Glamorgan County Silver Ball Trophy The Glamorgan County Silver Ball Trophy (also known as the Glamorgan County High Motive Silver Ball Trophy) is a Welsh rugby union competition open to all non-premier Welsh Rugby Union (WRU) clubs playing in the Glamorgan , HQ = ... 1984/85 - Winners Notable former players * Iorrie Isaacs 1933 * Stanley Powell 1935 * Joe Jones ≤1936 * Maldwyn James 1947 * Glyn Davies 1947 References Welsh rugby un ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Llanharan RFC
Llanharan Rugby Football Club is a rugby union club based in Llanharan, South Wales. Llanharan RFC was formally established in 1891-92 when Llanharan was little more than an agricultural hamlet. The earliest photograph on the clubhouse wall is dated 1898. Llanharan RFC is a member of the Welsh Rugby Union and is a feeder club for the Cardiff Blues. Early history In its early years, the club used local inns such as the High Corner and Turberville as a base. The club applied for Welsh Rugby Union membership in 1919 along with Pontyclun and Taffs Well. All three clubs were awarded membership on 22 August that year, but were told to "put your grounds in order".''Hard Kicks but Good Touches - A Celebration of 100 years of Rugby at Pontyclun R.F.C. 1887-1987'', John David (1987) pg28 In 1948 the first purpose built headquarters/changing rooms were transported from RAF Llandow airfield. A clubhouse was built in 1962 on the site of the old British Restaurant. The original building was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Big Pit National Coal Museum
Big Pit National Coal Museum ( cy, Pwll Mawr Amgueddfa Lofaol Cymru) is an industrial heritage museum in Blaenavon, Torfaen, Wales. A working coal mine from 1880 to 1980, it was opened to the public in 1983 as a charitable trust called the Big Pit (Blaenavon) Trust. By 1 February 2001 Big Pit Coal Museum was incorporated into the National Museum and Galleries of Wales as the National Mining Museum of Wales. The site is dedicated to operational preservation of the Welsh heritage of coal mining, which took place during the Industrial Revolution. Located adjacent to the preserved Pontypool and Blaenavon Railway, Big Pit is part of the Blaenavon Industrial Landscape, a World Heritage Site, and an Anchor Point of the European Route of Industrial Heritage. History of the working pit Big Pit was originally an iron mine, driven into the side of the mountain not far from the surface due to the shallow iron deposits, the level is called Engine Pit Level and can still be seen on the b ... [...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] |
Copper
Copper is a chemical element with the symbol Cu (from la, cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color. Copper is used as a conductor of heat and electricity, as a building material, and as a constituent of various metal alloys, such as sterling silver used in jewelry, cupronickel used to make marine hardware and coins, and constantan used in strain gauges and thermocouples for temperature measurement. Copper is one of the few metals that can occur in nature in a directly usable metallic form (native metals). This led to very early human use in several regions, from circa 8000 BC. Thousands of years later, it was the first metal to be smelted from sulfide ores, circa 5000 BC; the first metal to be cast into a shape in a mold, c. 4000 BC; and the first metal to be purposely alloyed with another metal, tin, to create br ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coal Mining
Coal mining is the process of extracting coal from the ground. Coal is valued for its energy content and since the 1880s has been widely used to generate electricity. Steel and cement industries use coal as a fuel for extraction of iron from iron ore and for cement production. In the United Kingdom and South Africa, a coal mine and its structures are a colliery, a coal mine is called a 'pit', and the above-ground structures are a ' pit head'. In Australia, "colliery" generally refers to an underground coal mine. Coal mining has had many developments in recent years, from the early days of men tunneling, digging and manually extracting the coal on carts to large open-cut and longwall mines. Mining at this scale requires the use of draglines, trucks, conveyors, hydraulic jacks and shearers. The coal mining industry has a long history of significant negative environmental impacts on local ecosystems, health impacts on local communities and workers, and contributes heavily ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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