Contour Strip Mining Coal Mining

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Contour strip mining | coal mining | Britannica

Other articles where Contour strip mining is discussed: auger mining: Augering is usually associated with contour strip-mining, recovering coal for a limited depth beyond the point where stripping becomes uneconomical because the seam of coal lies so far beneath the surface.

Surface Coal Mining

Surface Coal Mining. The primary methods of surface coal mining used in Pennsylvania are: Strip Mining: Layers of soil and rock overburden are removed the coal exposed coal seam is excavated.The area is then backfilled, regraded, and replanted during the reclamation process.

Strip Mining: Methods of Control by the Three Levels of ...

STRIP MINING: METHODS OF CONTROL BY THE THREE LEVELS OF GOVERNMENT M. DEBORAH BENOIT* INTRODUCTION Recent devastation of the landscape by strip mining operators is by now a familiar story to all concerned with the environment. The arid and bleak landscapes that are the left-over product of strip mining

About Us | Contura Energy

With customers across the globe, high-quality reserves and significant port capacity, Contura Energy reliably supplies both metallurgical coal to produce steel and thermal coal to generate power. Contura Energy is committed to operating safely, efficiently, and responsibly, with customer service second-to-none and an ongoing focus on continuous ...

SURFACE MINING | Coal Mining | The National Academies Press

Surface mining is classified as contour, area, open pit, and auger. Contour mining is used in hilly or mountainous areas (primarily in the East) where the coal is recovered from a narrow contour strip, 50 to 100 feet wide, that follows the coal seam around the irregular topogrphy.

Coal Contour Surface "Strip" Mining - Mine Engineer.Com

Coal Contour Surface "Strip" Mining . 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.

Obama Ends 150-Year War of Strip-Mining in 24 States! | Grist

Apr 01, 2010· Obama Ends 150-Year War of Strip-Mining in 24 States: Mountaintop Removal Loses Its Groove. Yeah, I've been wanting to wake up to that headline for years, too. Instead, I read another Coal ...

Strip Mining for Coal - YouTube

Jun 25, 2010· A belt line is used to carry spoils from open pit coal mine. A D-11 pushes material down to a 950 LeToureau loader. The loader dumps material into a crusher that breaks the rock down small enough ...

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Contour Mining. COAL, one of the most important mineral has been valued for many purposes since 's and it has been used to generate electricity and. contour strip mining. Contour strip mining is used mostly to mine coal on hilly or mountainous terrain. core . area strip mining 33 Terms. talia_devlin. area strip.

Chapter 2: The Environmental Effects of Strip Mining - The ...

EFFECTS OF. STRIP MINING ... An underground coal mine usually begins much like a contour mine, with a cut into the side of a hill. Indeed, many abandoned surface mines serve as the face for the underground mine. The bench created by the cut often houses the mine office and equipment storage. Several portals are usually dug into the coal seam at ...

What is Strip Mining? (with pictures)

Dec 16, 2019· In contour strip mining, strips are dug out around the contours of a mountain, and miners must be more careful to avoid collapses and other problems which can cause injuries or deaths. As one might imagine from the description, strip mining can be extremely disruptive.

Earth Science: Surface Mining.

Contour mining is a type of surface mining that follows the contour of a hill or mountain leaving terraces in the mountainside. This method is often used in areas that has steep terrain. The limitations of contour mining are both economical and technical.

Contour Mining Flashcards | Quizlet

• supplementary coal extraction techniques most often used immediately following contour strip mining • Depth of penetration is dependent on the variability of seam thickness, quality of the roof, geology, and equipment used • Recovery can vary from 40 to 60 %

Mine Tailings Disposal Methods

Surface mining is conducted by two basic methods: contour strip mining and area mining. 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 strip-mined land surrounding ...

More than half of the U.S. coal mines operating in 2008 ...

Contour strip mining accounted for more than half of the surface mine closures between 2008 and 2017. Open-pit coal mining is a combination of contour and area mining methods and is used to mine thick, steeply inclined coalbeds. In contrast to other forms of mining, open pit mines increased in number from 2008 to 2017, but production levels ...

Coal production using mountaintop removal mining decreases ...

In mountaintop removal, entire coal seams running through the upper portion of a mountain are mined by removing all of the overburden (rock or soil overlying a mineral deposit), creating a level plateau or gently rolling contour. This type of mining is sometimes considered a variation of contour mining.

Strip mining - The Full Wiki

Strip mining "Strip mining" is the practice of mining a seam of mineral by first removing a long strip of overlying soil and rock (the overburden).It is most commonly used to mine coal or tar sand.Strip mining is only practical when the ore body to …

Plundering Appalachia - The Tragedy of Mountaintop-Removal ...

Mountaintop removal is strip-mining on steroids. Massive dump trucks, huge bulldozers, and ten-story-high draglines can undo in months what geological processes took millions of years to build. Typically, multiple coal seams are exposed as a mountaintop-removal operation dismantles the landscape, piece by piece.

Block Method of Strip Mining

The more vocal critics, indeed, are calling for complete abolition of surface mining for coal. Contour Mining and its Associated Problems Assuming that mining is going to take place, the first decision necessary to the reclamation scheme is the ultimate use for the mined land.

5 Chief Pros and Cons of Strip Mining – ConnectUS

Sep 24, 2015· 5 Chief Pros and Cons of Strip Mining. Sep 24, 2015 Aug 29, 2015 by Editor in Chief. Surface mining refers to a category of mining where soil and rock overlying the mineral deposit are removed. There are several types of surface mining, and strip mining counts as one of them. ... West ia were once booming coal mining towns. They were ...

How to use strip mining in a sentence - WordHippo

Coal mining methods, particularly mountaintop removal and strip mining, have negative environmental impacts, and offshore oil drilling poses a hazard to aquatic organisms.: By 1920, the use of draglines and other modern equipment made strip mining possible and the privately owned Grand Lake area mines produced over 200,000 tons per year.: The limitations of contour strip mining …

(PDF) COAL MINING METHODS - ResearchGate

Contour strip mining is a method of surface mining or in which bulldozers, power shovels, or stripping wheels are used to remov e large chunks of earth in terraced strips in order to extract coal

Open-pit Mining, Opencast Mining, Open-cut Mining, Strip ...

Contour mining is associated with coal. This bed of coal is located at an elevation in a mountain range or any other hilly area. It is a method of strip or surface mining. It is also referred to as Bench mining. The coal is extracted from a mountainous area where it is not possible to extract the entire seam using mountain top removal mining.

Strip Mining - an overview | ScienceDirect Topics

Another factor that is considered when determining the economics of strip mining is the stripping ratio, which is the ratio of overburden thickness to coal seam thickness. Typically, the maximum stripping ratio that is economical is 20 to 1 [4]. The two general methods of strip mining are area mining and contour mining.

Auger Mining - MiningInfo

Augering is usually associated with contour strip-mining, recovering coal for a limited depth beyond the point where stripping becomes uneconomical because the seam of coal lies so far beneath the surface. An auger removes coal by drilling or cutting horizontally into the coal seam. These machines bring the coal to the surface for stockpiling ...

MY WORLD WILL COME TRUE: Coal Contour Surface "Strip" Mining

Jun 06, 2009· 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 partial removal of the coal seam at the elevation of the coal seam. Quite often, contour mining is utilized in more than one location on the same mountain.

coal mining | Contour strip mining - Students | Britannica ...

coal mining - Contour strip mining - Contour mining is commonly practiced where a coal seam outcrops in rolling or hilly terrain. Basically, the method consists of removing the overburden above the coal seam and then, starting at the outcrop and proceeding along the hillside, creating a bench around the hill.

Coal mining - Wikipedia

Mountaintop coal mining is a surface mining practice involving removal of mountaintops to expose coal seams, and disposing of associated mining overburden in adjacent "valley fills." Valley fills occur in steep terrain where there are limited disposal alternatives. Mountaintop removal combines area and contour strip mining methods. In areas ...

Pros and Cons of Strip Mining | APECSEC.org

Feb 25, 2015· For those who are unfamiliar, strip mining is a form of surface mining that focuses on the collection of tar sand and coal, which both rest somewhat close to Earth's surface. Those who support strip mining point to the increased ease of access and all of its attendant benefits. Detractors point to the controversies surrounding this method.

Surface Mining Test 2 Flashcards | Quizlet

Start studying Surface Mining Test 2. Learn vocabulary, terms, and more with flashcards, games, and other study tools. ... - Upper coal seam exposed first - Mining progresses along outcrop of lowest seam ... - done immediately after contour strip mining. Contour - …