Contour Strip Mining Coal Mining

Coal Contour Surface "Strip" Mining Mine

The Contour or Bench method of surface or strip mining is usually associated with coal, where a seam or multiple seams are located at a certain elevation or elevations through a mountain or hill Contour mining allows for the extraction of coal from mountainous areas, where it is not feasible to extract the entire seam, using mountain top removal mining Contour mining allows for the partialOther articles where contour strip mining is discussed: auger mining: Augering is usually associated with contour stripmining, recovering coal for a limited depth beyond the point where stripping becomes uneconomical because the seam of coal lies so far beneath the surfacecontour strip mining | coal mining | Britannica

What is contour strip mining? TreeHozz

Strip mining, removal of soil and rock (overburden) above a layer or seam (particularly coal), followed by the removal of the exposed mineral The common stripmining techniques are classified as area mining or contour mining on the basis of the deposit geometry and type23 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 In contour or area stripping, the overburden is hauled with differentStrip Mining an overview | ScienceDirect Topics

What is contour strip mining? TreeHozz

Strip mining, removal of soil and rock (overburden) above a layer or seam (particularly coal), followed by the removal of the exposed mineral The common stripmining techniques are classified as area mining or contour mining on the basis of the deposit geometry and typeAlmost everywhere there were surface mines Surface coal mining in the early twentieth century included contour mining, which removed the top layer of soil to get a coal seam But after World War II surface coal mining was enveloped by auger mining, which is a normal part of contour operations Surface mining was referred to as strip mining or stripping or sometimes as surface mining itselfOpenpit Mining, Opencast Mining, Opencut Mining, Strip

Commonly used mining techniques to extract coal ICSC

25/01/2018· Contour strip mining and area strip mining are the two forms of strip mining, which is often used to extract coal and lignite In contour strip mining, bulldozers or power shovels are deployed to take away huge amounts of ground material in terraced strips for extracting coal from a seam on a hill Area strip mining is commonly used on flat terrain to extract deposits spread over a large areaThis section describes the five main types of surface coal mining techniques: area mining, open pit mining, contour mining, auger mining, and mountaintop removal Underground mining is also considered in this section Terrain, economics, and custom generally dictate which technique an operator chooses All surface or strip mining first removes the overlying vegetation, soil and undergroundChapter 2: The Environmental Effects of Strip Mining The

Mining | Coal Mines

Auger mining is usually associated with contour strip mining With this method, the coal is removed by drilling auger holes from the last contour cut and extracting it in the same manner that shavings are produced by a carpenter’s bit Coal recovery rates approach 60 percent with this method The cutting heads of some augers are as high as 25 metres As each stem works its way into the coalStrip mining is the practice of mining a seam of mineral, by first removing a long strip of overlying soil and rock Highwall mining can produce thousands of tons of coal in contourstrip operations with narrow benches, previously mined areas, trench mine applications, and steepdip seams by utilizing a controlled waterinflow pump system and/or a gas (inert) venting system Recovery withSurface mining

Contour Mining Flashcards | Quizlet

Contour Strip Mining used in areas where a coal seam outcrops on the side of a hill, but the economics do not permit the complete removal of the overburden Mining proceeds along the outcrop in a strip or series of strips until the economic limit of stripping is reached Phases of Contour Mining • Removal of top soilopen cast or strip (furrow) mining It is frequently practiced on a large scale, which results in low unit cost, high productivity, high recovery, and greater safety compared to underground min ing Contour (or collar) mining progresses in a narrow zone following the outcrop of a coal seam in mountainous terrain The specific methods used in contour mining are referred to as haulback, boxcut143 Open Cast (Strip) Mining 1of 2

More than half of the US coal mines operating in 2008

30/01/2019· Strip mining is a method used on flat terrain and involves removing soil or rock above a layer of coal, exposing the coal seam for mining One type of strip mining is contour mining, where extraction activities occur on a hillside Another method, area mining, occurs on relatively flat terrain Contour strip mining accounted for more than half of the surface mine closures between 2008 and16/06/2017· Contour strip mines are used in hilly or rolling country, such as occurs in the Appalachian coal mining region Overburden excavations follow the contour of the coal outcrop along the hillside, resulting in long sinuous bands of stripmined land surrounding the hill Additional cuts are made into the hillside until the ratio of overburden to coal becomes economically unfavorable Extraction ofMine Tailings Disposal Methods

Contour Strip Mining Coal Mining Facty Mining Machinery

Contour Strip Mining Coal Mining Jan 25, 2018· Contour strip mining and area strip mining are the two forms of strip mining, which is often used to extract coal and lignite In contour strip mining, bulldozers or power shovels are deployed to take away huge amounts of ground material in terraced strips for extracting coal from a seam on a hill There are four series of products, including16/10/2021· The contour mining is used to remove coal from the layer following the contours found along the ridges of a hill or landscape The commonly used places for this type of mining are areas with rolling to steep terrain This method may create landslides and erosion troubles Using the freshly cut overburden to refill the mined areas rectifies these problems Strip mining has its own limitationsDifferent Methods of Mining Coal Steel Bars Shop

Environmental Effects Of Contour Coal Strip Mining

Environmental Effects of Contour Coal Strip Mining Author: Publisher: ISBN: Category: Coal mines and mining Page: 95 View: 210 DOWNLOAD NOW Political Science Posted on Coal Surface Mining In this book leading authorities address the economic, environmental, and legal ramifications of land reclamation following coal surface mining, review the status of the coal05/12/2016· Contour Strip Mining Carissa Goddeau & Avery DeBoer It is hazardous to human health Linked to birth defects, heart disease, and cancer in communities that are affected by fallouts Fallout contain millions of pounds of mining explosives, silica dust, and pulverized heavy metals ItContour Strip Mining by Carissa Goddeau Prezi

732: Contour Mining | ABC 123: Testing Site / Course

03/07/2010· Contour mining methods evolved to allow the economic extraction of coal using smaller and more agile equipment with more flexible mining patterns As with area mining, it is necessary to remove the vegetation and remove the overburden to gain access to the coal seam There are two ways to handle the removed overburden: haul it all the way down the hill and put it into a chosen valley inopen cast or strip (furrow) mining It is frequently practiced on a large scale, which results in low unit cost, high productivity, high recovery, and greater safety compared to underground min ing Contour (or collar) mining progresses in a narrow zone following the outcrop of a coal seam in mountainous terrain The specific methods used in contour mining are referred to as haulback, boxcut143 Open Cast (Strip) Mining 1of 2

Contour Mining Flashcards | Quizlet

Contour Strip Mining used in areas where a coal seam outcrops on the side of a hill, but the economics do not permit the complete removal of the overburden Mining proceeds along the outcrop in a strip or series of strips until the economic limit of stripping is reached Phases of Contour Mining • Removal of top soilView Group4Reportppt from AA 1 CONTOUR MINING CONTOUR STRIP MINING Contour Strip mining is a kind of surface mining but it is practiced on hilly or mountainous terrain In this, aGroup4Reportppt CONTOUR MINING CONTOUR STRIP MINING

Strip Mining: A Destructive Way of Coal Extraction

12/03/2017· Surface or strip mining damages and pollutes ecosystems to a great degree This is because by definition the process of strip mining involves striping away trees, plants and topsoil so that the coal can be accessed underneath This means that surface mining destroys mountain tops, landscapes, forests and wildlife habitats16/06/2017· Contour strip mines are used in hilly or rolling country, such as occurs in the Appalachian coal mining region Overburden excavations follow the contour of the coal outcrop along the hillside, resulting in long sinuous bands of stripmined land surrounding the hill Additional cuts are made into the hillside until the ratio of overburden to coal becomes economically unfavorable Extraction ofMine Tailings Disposal Methods

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