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The Siilinjärvi carbonatite complex, [1] an open-pit mine owned by Yara International, in Siilinjärvi, Finland Coal strip mine in Wyoming. Surface mining, including strip mining, open-pit mining and mountaintop removal mining, is a broad category of mining in which soil and rock overlying the mineral deposit (the overburden) are removed, in contrast to underground mining, in which the ...
When coal seams are near the surface, it may be economical to extract the coal using open-cut, also referred to as open-cast, open-pit, mountaintop removal or strip, mining methods. Opencast coal mining recovers a greater proportion of the coal deposit than underground methods, as more of the coal seams in the strata may be exploited. This ...
Coal, primarily from underground mines east of the Mississippi was the nation's primary fuel source until the early 1950s. Surface (strip) and mountaintop removal mining overtook underground mines in the 1970s.
Kosse Strip: Luminant Mining Surface Texas: 10,997,088 Rawhide Mine: Peabody Energy Corporation [3] Surface Wyoming 10,346,144 Enlow Fork Mine: CONSOL Energy [9] Underground Pennsylvania: 9,180,468 Coal Creek Mine: Arch Coal [4] Surface Wyoming 8,963,048 River View Mine: River View Coal Underground Kentucky
In 1987 Wyoming became the largest coal producing state. It uses strip mining exclusively. Wyoming's coal reserves total about 69.3 billion short tons (62.9 Pg), or 14.2% of the U.S. coal reserve. [69] In 2008, competition was intense in the US coal mining industry with some U.S. mines approaching the end of their useful life (mine closure).
The Chuitna Coal Project was a proposed coal strip mine that, if granted state and federal permits, would have been built about 45 miles (72 km) southwest of Anchorage, Alaska, in an area known as the Beluga Coal Fields near the Chuitna River and the small communities of Tyonek and Beluga in upper Cook Inlet.
Mountaintop removal mining (MTR), also known as mountaintop mining (MTM), is a form of surface mining at the summit or summit ridge of a mountain. Coal seams are extracted from a mountain by removing the land, or overburden , above the seams.
Colstrip was established by the Northern Pacific Railway in 1924 as a company town to provide coal for their steam locomotives. The mining at Rosebud Mine two miles south of the town is open pit strip mining, where draglines remove soil above the layer of bituminous coal from the Fort Union Formation. [5] [6]