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Coal Mines
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 to th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
FIRST SHIFT OF MINERS AT THE VIRGINIA-POCAHONTAS COAL COMPANY MINE ^4 NEAR RICHLANDS, VIRGINIA, LEAVING THE ELEVATOR
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Hydraulic Jack
A jack is a mechanical lifting device used to apply great forces or lift heavy loads. A mechanical jack employs a screw thread for lifting heavy equipment. A hydraulic jack uses hydraulic power. The most common form is a car jack, floor jack or garage jack, which lifts vehicles so that maintenance can be performed. Jacks are usually rated for a maximum lifting capacity (for example, 1.5 tons or 3 tons). Industrial jacks can be rated for many tons of load. Etymology The personal name ''Jack'', which came into English usage around the thirteenth century as a nickname form of ''John'', came in the sixteenth century to be used as a colloquial word for 'a man (of low status)' (much as in the modern usage 'jack of all trades, master of none'). From here, the word was 'applied to things which in some way take the place of a lad or man, or save human labour'. The first attestation in the ''Oxford English Dictionary'' of ''jack'' in the sense 'a machine, usually portable, for lifting ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stratum
In geology and related fields, a stratum ( : strata) is a layer of rock or sediment characterized by certain lithologic properties or attributes that distinguish it from adjacent layers from which it is separated by visible surfaces known as either '' bedding surfaces'' or ''bedding planes''.Salvador, A. ed., 1994. ''International stratigraphic guide: a guide to stratigraphic classification, terminology, and procedure. 2nd ed.'' Boulder, Colorado, The Geological Society of America, Inc., 215 pp. . Prior to the publication of the International Stratigraphic Guide, older publications have defined a stratum as either being either equivalent to a single bed or composed of a number of beds; as a layer greater than 1 cm in thickness and constituting a part of a bed; or a general term that includes both ''bed'' and ''lamina''.Neuendorf, K.K.E., Mehl, Jr., J.P., and Jackson, J.A. , eds., 2005. ''Glossary of Geology'' 5th ed. Alexandria, Virginia, American Geological Institute. 779 pp. . ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tagebau Hambach
The Tagebau Hambach is a large open-pit coal mine (german: Tagebau) in Niederzier and Elsdorf, North Rhine–Westphalia, Germany. It is operated by RWE and used for mining lignite. The mine is on the site of the ancient Hambach Forest, which was purchased by RWE in 1978. The company then cut most of the forest down and cleared it to mine. Only 10% of the forest area remains. RWE planned to clear half of the remaining area between 2018 and 2020. This plan was met with massive protests in the autumn of 2018 and was temporarily stopped in October 2018 by the supreme administrative court of North Rhine–Westphalia (Oberverwaltungsgericht für das Land Nordrhein-Westfalen). Begun in 1978, the mine's operation area currently (as of end of 2017) has a size of 43.8 km2, with the total area designated for mining having a size of 85 km2. It is the deepest open pit mine with respect to sea level: the bottom of the pit, with up to from the surface, is below sea level, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Overburden
In mining, overburden (also called waste or spoil) is the material that lies above an area that lends itself to economical exploitation, such as the rock, soil, and ecosystem that lies above a coal seam or ore body. Overburden is distinct from tailings, the material that remains after economically valuable components have been extracted from the generally finely milled ore. Overburden is removed during surface mining, but is typically not contaminated with toxic components. Overburden may also be used to restore an exhausted mining site during reclamation. Interburden is material that lies between two areas of economic interest, such as the material separating coal seams within strata.Peng, Syd S. (1986) ''Coal Mine Ground Control'' (2nd edition), Wiley, New York, page 303, Analogous uses Overburden is also used for all soil and ancillary material above the bedrock horizon in a given area. By analogy, overburden is also used to describe the soil and other material that lies ab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coal Preparation Plant
300px, A coal "washer" in Eastern Kentucky A modern coal breaker in Mahanoy City, Pennsylvania combines washing, crushing, grading, sorting, stockpiling, and shipping in one facility built into a stockpile of anthracite coal below a mountain top strip mine A coal preparation plant (CPP; also known as a coal handling and preparation plant (CHPP), coal handling plant, prep plant, tipple or wash plant) is a facility that washes coal of soil and rock, crushes it into graded sized chunks (sorting), stockpiles grades preparing it for transport to market, and more often than not, also loads coal into rail cars, barges, or ships. The more of this waste material that can be removed from coal, the lower its total ash content, the greater its market value and the lower its transportation costs. Run-of-mine (ROM) coal The coal delivered from the mine that reports to the coal preparation plant is called run-of-mine, or ROM, coal. This is the raw material for the CPP, and consists of co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boats Hauling Coal
A boat is a watercraft of a large range of types and sizes, but generally smaller than a ship, which is distinguished by its larger size, shape, cargo or passenger capacity, or its ability to carry boats. Small boats are typically found on inland waterways such as rivers and lakes, or in protected coastal areas. However, some boats, such as the whaleboat, were intended for use in an offshore environment. In modern naval terms, a boat is a vessel small enough to be carried aboard a ship. Boats vary in proportion and construction methods with their intended purpose, available materials, or local traditions. Canoes have been used since prehistoric times and remain in use throughout the world for transportation, fishing, and sport. Fishing boats vary widely in style partly to match local conditions. Pleasure craft used in recreational boating include ski boats, pontoon boats, and sailboats. House boats may be used for vacationing or long-term residence. Lighters are used to convey ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coal In India
Coal in India has been mined since 1774, and India is the second largest producer and consumer of coal after China, mining in FY 2022. Around 30% of coal is imported. Due to high demand and poor average quality, India imports coking coal to meet the requirements of its steel plants. Dhanbad, the largest coal producing city, has been called the coal capital of India. State-owned Coal India had a monopoly on coal mining between its nationalisation in 1973 and 2018. Most of the coal is burned to generate electricity and most electricity is generated by coal, but coal-fired power plants have been criticised for breaking environmental laws. The health and environmental impact of the coal industry is serious, and phasing out coal would have short-term health and environmental benefits greatly exceeding the costs. Electricity from new solar farms in India is cheaper than that generated by the country's existing coal plants. History The Indira Gandhi administration nationalized co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coal In China
China is the largest producer and consumer of coal in the world. It is also the largest user of coal-generated electricity, with over a thousand coal-fired power stations. The share of coal in the energy mix declined during the 2010s, falling from 80% in 2010 to 58% in 2019. China emits over 10% of global greenhouse gas. China's large demand was in part responsible for the delay in peak global coal production, coal production reached a record high in December 2021 and coal consumption in China is forecast to reach a record high in 2021. Overall electricity consumption continued to rise in the 2010s, and new coal-fired power plants were constructed to help meet demand. But to curtail the pace of coal-fired power station construction, the National Energy Administration in 2017 canceled coal-fired power plant permits that would have amounted to 120 GW of future capacity. However, local authorities seeking to create jobs resisted the efforts of central authorities to cut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Energy Industry
The energy industry is the totality of all of the industries involved in the production and sale of energy, including fuel extraction, manufacturing, refining and distribution. Modern society consumes large amounts of fuel, and the energy industry is a crucial part of the infrastructure and maintenance of society in almost all countries. In particular, the energy industry comprises: * the fossil fuel industries, which include petroleum industries (oil companies, petroleum refiners, fuel transport and end-user sales at gas stations) coal industries (extraction and processing) and the natural gas industries ( natural gas extraction, and coal gas manufacture, as well as distribution and sales); * the electrical power industry, including electricity generation, electric power distribution and sales; * the nuclear power industry; * the renewable energy industry, comprising alternative energy and sustainable energy companies, including those involved in hydroelectric power ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossil Fuel Phase-out
Fossil fuel phase-out is the gradual reduction of the use and production of fossil fuels to zero. It is part of the ongoing renewable energy transition. Current efforts in fossil fuel phase-out involve replacing fossil fuels with sustainable energy sources in sectors such as transport and heating. Alternatives to fossil fuels include electrification, green hydrogen and biofuel. Phase-out policies include both demand-side and supply-side constraints. Whereas demand-side approaches seek to reduce fossil-fuel consumption, supply-side initiatives seek to constraint production to accelerate the pace of energy transition and reduction in emissions. Scope While crude oil and natural gas are also being phased out in chemical processes (e.g. production of new building blocks for plastics) as the circular economy and biobased economy (e.g. bioplastics) are being developed to reduce plastic pollution, the fossil fuel phase out specifically aims to end the burning of fossil fuels and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
