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Tailings Dam
A tailings dam is typically an earth-fill embankment dam used to store byproducts of mining operations after separating the ore from the gangue. Tailings can be liquid, solid, or a slurry of fine particles, and are usually highly toxic and potentially radioactive. Solid tailings are often used as part of the structure itself. Tailings dams rank among the largest engineered structures on earth. The Syncrude Mildred Lake Tailings Dyke in Alberta, Canada, is an embankment dam about long and from high. It is the largest dam structure on earth by volume, and as of 2001 it was believed to be the largest earth structure in the world by volume of fill. There are key differences between tailings dams and the more familiar hydroelectric dams. Tailings dams are designed for permanent containment, meaning they are intended to "remain there forever". Copper, gold, uranium and other mining operations produce varied kinds of waste, much of it toxic, which pose varied challenges for lo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Syncrude Mildred Lake Plant
Syncrude Canada Ltd. is one of the world's largest producers of synthetic crude oil from oil sands and the largest single source producer in Canada. It is located just outside Fort McMurray in the Athabasca Oil Sands, and has a nameplate capacity of of oil, equivalent to about 13% of Canada's consumption. It has approximately of proven and probable reserves (11.9 billion when including contingent and prospective resources) situated on 8 leases over 3 contiguous sites. Including fully realized prospective reserves, current production capacity could be sustained for well over 90 years. The company is a joint venture between four partners (Suncor Energy (58.74%), Imperial Oil (25%), Sinopec (9.03%) and CNOOC (7.23%)). As a result, Syncrude is not traded directly, but rather through the individual owners. The ownership board must approve all annual operating budgets and proposed capital spending projects, and are required to provide the funding for said activities based on their ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trapezoid
A quadrilateral with at least one pair of parallel sides is called a trapezoid () in American and Canadian English. In British and other forms of English, it is called a trapezium (). A trapezoid is necessarily a convex quadrilateral in Euclidean geometry. The parallel sides are called the ''bases'' of the trapezoid. The other two sides are called the ''legs'' (or the ''lateral sides'') if they are not parallel; otherwise, the trapezoid is a parallelogram, and there are two pairs of bases). A ''scalene trapezoid'' is a trapezoid with no sides of equal measure, in contrast with the special cases below. Etymology and ''trapezium'' versus ''trapezoid'' Ancient Greek mathematician Euclid defined five types of quadrilateral, of which four had two sets of parallel sides (known in English as square, rectangle, rhombus and rhomboid) and the last did not have two sets of parallel sides – a τραπέζια (''trapezia'' literally "a table", itself from τετράς (''tetrás'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Australian Financial Review
''The Australian Financial Review'' (abbreviated to the ''AFR'') is an Australian business-focused, compact daily newspaper covering the current business and economic affairs of Australia and the world. The newspaper is based in Sydney, New South Wales, Australia; owned by Nine Entertainment and has been published continuously since its founding in 1951. The ''AFR'', along with the rest of Fairfax Media (aside from some publications which were sold to Australian Community Media), was sold to Nine Entertainment for more than A$2.3 billion.Mergermarket - An Acuris company. (n.d''.). Fairfax Media Limited Nine Entertainment Co. Holdings Ltd Merger.'' Retrieved from www.mergermarket.com/Common/Mergermarket/Deals/DealDetails.aspx?dealsysid=933952&extern=19&id=239512&contextid=1018456074&zone=205¤cyCode=AUD The ''AFR'' is published in tabloid format six times a week, whilst providing 24/7 online coverage through its website. In November 2019, the ''AFR'' reached 2.647 million Au ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Financial Times
The ''Financial Times'' (''FT'') is a British daily newspaper printed in broadsheet and published digitally that focuses on business and economic current affairs. Based in London, England, the paper is owned by a Japanese holding company, Nikkei, with core editorial offices across Britain, the United States and continental Europe. In July 2015, Pearson sold the publication to Nikkei for £844 million ( US$1.32 billion) after owning it since 1957. In 2019, it reported one million paying subscriptions, three-quarters of which were digital subscriptions. The newspaper has a prominent focus on financial journalism and economic analysis over generalist reporting, drawing both criticism and acclaim. The daily sponsors an annual book award and publishes a " Person of the Year" feature. The paper was founded in January 1888 as the ''London Financial Guide'' before rebranding a month later as the ''Financial Times''. It was first circulated around metropolitan London by James Sher ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isto é
Edvard Isto, or Eetu Isto (28 November 1865 – 14 October 1905) was a Finnish artist, best known for his patriotic painting '' The Attack'' which depicts the perceived Russification of Finland by the Russian Empire. The work was widely reproduced in its original form and in variations. Biography He was the youngest of nine children born to a family of farmers, to Jaakob and Kaisa Liisa Isto, and the only one who attended school; the nearest of which was six kilometres away. Even so, he was unable to continue beyond the elementary grades, because the nearest secondary school was too far away, in Oulu. When he turned eighteen, he went to Övertorneå, in Sweden, to work at a decorating company owned by one of his cousins.Pekka Rönkkö (1990) ''Eetu Isto (1865–1905) ja Hyökkäys (1899)'' (Oulu: Ars Nordica) He moved to Helsinki in 1888, where he studied art and design at what is now the "Aalto University School of Arts, Design and Architecture", but could only advance ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vale (mining Company)
Vale S.A., formerly ''Companhia Vale do Rio Doce'' (the Sweet River Valley Company, referring to the Doce River) () is a Brazilian multinational corporation engaged in metals and mining and one of the largest logistics operators in Brazil. Vale is the largest producer of iron ore and nickel in the world. It also produces manganese, ferroalloys, copper, bauxite, potash, kaolin, and cobalt, currently operating nine hydroelectricity plants, and a large network of railroads, ships, and ports used to transport its products. The company has had two catastrophic tailings dam failures in Brazil: Mariana, in 2015, and Brumadinho, in 2019; the Brumadinho dam disaster caused the company to lose its license to operate eight tailings dams in Minas Gerais, and its stock to lose nearly 25 percent in value. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brumadinho Dam Disaster
The Brumadinho dam disaster occurred on 25 January 2019 when Dam I, a tailings dam at the Córrego do Feijão iron ore mine, east of Brumadinho, Minas Gerais, Brazil, suffered a catastrophic failure. The dam is owned by Vale, the same company that was involved in the 2015 Mariana dam disaster. The dam released a mudflow that advanced through the mine's offices, including a cafeteria during lunchtime, along with houses, farms, inns, and roads downstream. 270 people died as a result of the collapse, of whom 259 were officially confirmed dead, in January 2019, and 11 others reported as missing, whose bodies had not been found. Background According to the national registry of the National Mining Agency, the Córrego do Feijão dam, built in 1976 by the Ferteco Mineração and acquired by the iron ore miner Vale in 2001, was classified as a small structure with low risk of high potential damage. In a statement, the State Department of Environment and Sustainable Development repo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Africa
South Africa, officially the Republic of South Africa (RSA), is the Southern Africa, southernmost country in Africa. It is bounded to the south by of coastline that stretch along the Atlantic Ocean, South Atlantic and Indian Oceans; to the north by the neighbouring countries of Namibia, Botswana, and Zimbabwe; and to the east and northeast by Mozambique and Eswatini. It also completely Enclave and exclave, enclaves the country Lesotho. It is the southernmost country on the mainland of the Old World, and the List of countries and dependencies by population, second-most populous country located entirely south of the equator, after Tanzania. South Africa is a biodiversity hotspot, with unique biomes, plant and animal life. With over Demographics of South Africa, 60 million people, the country is the world's List of countries and dependencies by population, 24th-most populous nation and covers an area of . South Africa has three capital cities, with the executive, judicial and le ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2022 Jagersfontein Dam Collapse
The 2022 Jagersfontein Tailings Dam Collapse was a structural failure of a mine tailings dam near Jagersfontein, located in the Free State province of South Africa, resulting in a mudslide. Background The Jagersfontein Mine is currently the deepest hand-excavated hole in the world and is known for: * the 972 carat (194.4 g) Excelsior Diamond of 1893 and * the 637 carat (127.4 g) Reitz Diamond of 1895. For the duration of the mine's operational history, it was run by De Beers up to 1972, when it was deproclaimed. De Beers did however retain prospecting rights on the property until 2002. Limited remining operations at the mine were eventually started in September 2010 by a company named Son Op before it changed its name to Jagersfontein Development. Reinet Investments of Luxembourg became involved around 2011, but eventually sold out to Stargems Group around early 2022. A court case, De Beers Consolidated Mines Ltd v Ataqua Mining (Pty) Ltd, related to historic dumps were fou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bento Rodrigues, Mariana, Minas Gerais (22730754128)
A is the Japanese iteration of a single-portion take-out or home-packed meal, often for lunch. Outside Japan, it is common in other East and Southeast Asian culinary styles, especially within Chinese, Korean, Singaporean cuisines and more, as rice is a common staple food in the region. The term ''bento'' is derived from the Chinese term ''biandang'' (, ), which means "convenient" or "convenience". A traditional ''bento'' may contain rice or noodles with fish or meat, often with pickled and cooked vegetables in a box."Bento: Changing New York's Lunch Culture," ''Chopsticks NY,'' vol. 27, July 2009, p. 10-11. Containers range from mass-produced disposables to hand-crafted lacquerware. Often various dividers are used to separate ingredients or dishes, especially those with strong flavors, to avoid them affecting the taste of the rest of the meal. A typical divider is green plastic grass, also known as the 'sushi grass'. This also works to slow the growth of bacteria. ''Be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Forensic Engineering
Forensic engineering has been defined as ''"the investigation of failures - ranging from serviceability to catastrophic - which may lead to legal activity, including both civil and criminal".'' It includes the investigation of materials, products, structures or components that fail or do not operate or function as intended, causing personal injury, damage to property or economic loss. The consequences of failure may give rise to action under either criminal or civil law including but not limited to health and safety legislation, the laws of contract and/or product liability and the laws of tort. The field also deals with retracing processes and procedures leading to accidents in operation of vehicles or machinery. Generally, the purpose of a forensic engineering investigation is to locate cause or causes of failure with a view to improve performance or life of a component, or to assist a court in determining the facts of an accident. It can also involve investigation of intellec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ASARCO
Asarco LLC (American Smelting and Refining Company) is a mining, smelting, and refining company based in Tucson, Arizona, which mines and processes primarily copper. The company has been a subsidiary of Grupo México since 1999. Its three largest open-pit mines are the Mission, Silver Bell and Ray mines in Arizona. Its mines produce of copper a year. Asarco conducts solvent extraction and electrowinning at the Ray and Silver Bell mines in Pima County, Arizona, and Pinal County, Arizona, and operates a smelter in Hayden, Arizona. Asarco's smelting plant in El Paso, Texas, was suspended in 1999 and then demolished on April 13, 2013. Before closing, the plant produced of anodes each year. Refining at the mines as well as at a copper refinery in Amarillo, Texas, produce of refined copper each year. Asarco's hourly workers are primarily represented by the United Steelworkers. Asarco has 20 superfund sites across the United States, and it is subject to considerable li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
