classifiion of coal mining method and uses



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(PDF) Underground mining Methods

An older practice of coal mining that uses explosives such as dynamite to break up the coal seam, after which the coal is gathered and loaded ont o shuttle cars or conv eyors for removal to a ....

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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 a 'pit', and ....

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Mining Methods

The room and pillar method is often used to mine smaller coal blocks or thin seams, and seam recovery ranges from 35% to 70%, with higher seam recovery rates applicable where retreat mining is combined with room and pillar mining The other underground mining method commonly used in the United States is the longwall mining method...

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Methods of Gold Mining

Gold mining is the process of mining of gold or gold ores from the ground There are several techniques and processes by which gold may be extracted from the earth Placer mining Placer mining is the technique by which gold that has accumulated in a placer deposit is extracted...

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What are the types of coal mining methods?

Dec 29, 2016· Commonly coal mining methods are divided into two kinds, open pit mining and underground mining Open pit mining or surface mining method is used when coal seam position near the surface While Underground mining is used when coal seam is far belo....

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Room and pillar mining

classification of coal mining method and us Thermal coal products in South Africa J r n a coal seams means that mining gives rise to a diversity of marketable coal products The geological setting of the reserves largely determines the characteristics of the coal product to be marketed, but application of appropriate mining methods together ....

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Coal Mining Methods

Longwall mining and room-and-pillar mining are the two basic methods of mining coal underground, with room-and-pillar being the traditional method in the United Stat Both methods are well suited to extracting the relatively flat coalbeds (or coal seams) typical of the United Stat Although widely used in other countries, longwall mining ....

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Mining Water Use

The mining water-use category includes groundwater and surface water that is withdrawn and used for nonfuels and fuels mining Nonfuels mining includes the extraction of ores, stone, sand, and gravel Fuels mining includes the extraction of coal, petroleum, and natural gas Water is used for mineral extraction, quarrying, milling, and other....

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Coal mining

Choosing a mining method The various methods of mining a coal seam can be classified under two headings, surface mining and underground mining Surface and underground coal mining are broad activities that incorporate numerous variations in equipment and methods, and the choice of which method to use in extracting a coal seam depends on many technological, economic, and social factors...

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The Explosives Used in Mining

The Industrial Revolution carried discoveries in explosives and initiation technologi A specialization principle, therefore, operates between the military and civil application of explosives thanks to new products economics, versatility, strength, precision or capability to be stored for long periods without significant deterioration...

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What are the types of coal?

Coal is primarily used as fuel to generate electric power in the United Stat The coal is burned and the heat given off is used to convert water into steam, which drives a turbine In 2012, about 39 percent of all electricity in the United States was generated by coal-fired power plants, according to the US Energy Information Administration....

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Circular 891

An estimate or estimates may be the principal data used to assess the coal resources and reserves of an area See economic assessment and geologic assessment auger mining-- A method often associated with contour strip mining to recover additional coal after the overburden to coal ratio has become too great for further contour mining...

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Classification of Coal

Classification of coal based on volatile matter and cooking power of clean material Sponsored Links Coal is a readily combustible rock containing more than 50 percent by weight of carbonaceous material formed from compaction and indurations of variously altered plant remains similar to those in peat...

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SOUTH AFRICAN COAL SECTOR REPORT

The most economical method of coal extraction from coal seams depends on the depth and quality of the seams, as well as the geology and environmental factors Surface (opencast) mining and deep underground mining are the two basic methods of mining used in South Africa Approximately 51% of South African coal mining is done underground and ....

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Opencut Mining or Underground Mining

Oct 21, 2017· Coal is the largest portion of underground mining It represents 60 percent of global coal production Besides coal, underground can be used to mine gold or copper In underground mining, there are two methods: bord-and-pillar and longwall Bord-and-pillar Bord-and-pillar is the oldest mining method...

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Types of mining methods || coal mining methods

Apr 24, 2018· Here in this video we have discussed different types of mining methods including coal mining methods:- 1Surface Mining:- Opencast Mining Auger Mining Strip Mining Contour mining Highwall Mining ....

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Strip Mining

Andrew P Schissler, in Encyclopedia of Energy, 2004 23 Strip Mining Strip mining is employed in coal reserves where the overburden is removed in rectangular blocks in plan view called pits or strips The pits are parallel and adjacent to each other Strip mining is fundamentally different from contour or area mining on how the overburden is displaced, called spoil handling...

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Glossary of coal mining terminology

A bell pit was a type of coal mine in which coal found close to the surface was extracted by sinking a shaft and removing coal from around it until the roof became unstable It was then abandoned and left to subside Bind A term used in various areas to refer to shale, mudstone, clay or sandstone overlying the seam Bituminous coal...

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EVALUATION OF COAL

affected by coal mining, and (2) compare several methods used to determine coal-mining effects on benthic invertebrate community structure and composition Data on which this report is based were collected from the heavily mined Smoky Creek basin and the undis-...

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