CH 15 Flashcards | Quizlet

Type of surface mining that uses explosives, massive shovels, and even larger machinery called draglines to remove the top of a mountain to expose seams of coal underneath a mountain. Compare area strip mining, contour strip mining.

STRIP MINING - Coal Sales Online

Strip mining is accomplished by two techniques; area stripping and contour stripping. Where coal seams are relatively flat and near the surface. In area strip mining, the overlying material is removed from the seams of coal. Area strip mining is removed in long narrow bands, or strips, followed by removal of the exposed coal.

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

THE ENVIRONMENTAL EFFECTS OF STRIP MINING A ... This section describes the five main types of surface coal mining techniques: area mining, open pit mining, contour ... An underground coal mine usually begins much like a contour mine, with a cut into The, . Environmental Effects, ...

Strip Mining - an overview | ScienceDirect Topics

Surface mining of coal is an alternative to underground mining, and it is practiced as strip mining, the most common form, and auger mining. Some coal is also produced through dredging and culm bank (i.e., anthracite waste piles) recovery, but these quantities tend to be relatively small compared to underground, strip, and auger mining.

Locations | Contura Energy

Contura Energy (NYSE: CTRA) is a Tennessee-based coal supplier with affiliate mining operations across major coal basins in Pennsylvania, ia and West ia. 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 ...

Pros and Cons of Strip Mining | APECSEC.org

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.

Strip Mining, Open-pit Mining, Surface Mining, Mining ...

Strip mining is a kind of surface mining. The ore is very near to the surface of the land but has one or more layers of rock and filth on top of it. To mine the ore, these layers have to be removed.

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

Coal mining is far and away the largest industrial consumer of explosives in the United States. According to government figures for 2005, more than 1.8 billion pounds of high explosives were used in West ia and Kentucky alone, primarily in surface-mining operations.

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

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 ...

coal countur surface strip mining - amjstationery.in

Contour Strip Mining - RitchieWiki. Contour strip mining is a method of surface mining or in which bulldozers, power shovels, or stripping wheels are used to remove large chunks of earth in terraced strips in order to extract coal from a seam or series of seams on a hill or mountain.

Coal Countur Surface Strip Mining - podnosniki-samochodowe.eu

Contour Strip Mining - RitchieWiki. Contour strip mining is a method of surface mining or in which bulldozers, power shovels, or stripping wheels are used to remove large chunks of earth in terraced strips in order to extract coal from a seam or series of seams on a hill or mountain.

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 ...

About Us | Contura Energy

Contura Energy affiliates operate both underground and surface coal mining complexes across Northern and Central Appalachia. VIEW OUR FACILITY LOCATIONS

Impacts of Contour Coal Mining on Streamflow, a Case …

Tung, Hong-Shoung, "Impacts of Contour Coal Mining on Streamflow, a Case Study of the New River Watershed, Tennessee. " PhD diss., University of Tennessee, 1975. ... Growth of the Surface Coal Mining Industry ... Extent of Contour Strip Coal Mining in the New 29 River Watershed, Tennessee from 1943 to 1973 32

Contour strip mining | coal mining | Britannica.com

association with auger mining. In 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. Read More; surface coal mining

Mining 101 | West ia Coal Association

Surface mining can be further categorized into three basic operational methods: contour mining, area mining and mountaintop removal mining. All three forms of surface mining are generally referred to as "mountaintop mining." "Mountaintop mining" is simply coal mining that occurs at or near the topmost portion of a mountain.

Strip Mining for Coal - YouTube

Sep 11, 2015· Almost 20 years since the strip mine began and it is still going strong here in Stellarton, Nova Scotia. ... Strip Mining for Coal JimHowDigsDirt. Loading... Unsubscribe from JimHowDigsDirt?

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

The most economical method of extracting coal depends upon the depth and the quality of the coal seams. Coals are mined both from surface and underground. 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.

Surface mining - Wikipedia

"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 and lignite (brown coal).Strip mining is only practical when the ore body to be excavated is relatively near the surface.

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

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.

Basic Information about Surface Coal Mining in Appalachia ...

Surface coal mining in the steep terrain of the central Appalachian coalfields includes: mountaintop removal, contour, area, highwall, and; auger mining.

area strip mining Flashcards | Quizlet

type of surface mining used where the terrain is flat. an earthmover strips away the overburden, and a power shovel digs a cut to remove the mineral deposit. ... area strip mining. ... cuts a series of terraces into the side of a hill. an earthmover removes the overburden and a power shovel extracts the coal. the overburden from each new ...

Mountaintop Removal 101 > Appalachian Voices

Mountaintop removal is any method of surface coal mining that destroys a mountaintop or ridgeline, whether or not the mined area will be returned to what is legally described as the "approximate original contour." Methods of mountaintop removal coal mining include, but are not limited to: cross-ridge mining, box-cut method mining, steep ...

Underground v.s. Surface Coal Mines: Is Deep Drilling ...

Trucks and shovels are used to remove excess fragments as a drill systematically bores into the mine, stripping it of coal, typically recovering a higher proportion of the coal deposits than underground mining. Strip mining is sensible when the ore body is near the surface.

Surface mining techniques In general surface mining is the ...

Surface mining techniques In general, surface mining is the cheapest and most productive method of mining coal. Surface mining techniques can extract up to 95 per cent of the coal in a particular deposit. Surface mines exist in three general situations: • area mines — where the terrain is flat, or gently undulating, and the coal seam or seams are at a relatively constant depth; • contour ...

Economic Surface Mining of Multiple Seams - SAIMM

Economic Surface Mining of Multiple Seams ... classified either as area or contour mining .. Area strip-mining is practiced on relatively flat terrain. A 'box cut' is made ... For surface coal mining some of the variables are as follows: Physical variables (i) Ratio of overburden to ore.

Underground v.s. Surface Coal Mines: Is Deep Drilling ...

Opencast mining, otherwise known as surface mining consist of three different techniques: strip mining, open-pit mining, and mountain top blasting. In general, the three processes include breaking up soil and rocks via explosives and then removing debris until coal seams are exposed.

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

EFFECTS OF. STRIP MINING ... SMCRA's provisions apply not only to surface mining, but also to the surface effects of underground mining. ... as compared with 69 percent surface mining. An underground coal mine usually begins much like a contour mine, with a cut into the side of a hill.