ROCK SPRINGS, Wyo. (AP) - The largest surface coal mine in Sweetwater County would become an underground mine, under a proposal being reviewed by a federal agency.

The 'longwall' method yields more, supporters of an Illinois plan say. But opponents say it will cause wide swaths of cropland to droop. Farmers Fear Coal Mining Will Sink Land - Los Angeles Times ...

Longwall mining methods were introduced through ambitious projects in the 1970s and 80s, but failed to achieve the desired results, owing to the fragmented nature of underground coal deposits.

The focus of a new Center investigation, longwall mining represents the most brutal technology yet available to rip the coal out from belowground as quickly and as cheaply as possible. The region’s ...

The brutally efficient coal-extraction method known as “longwall mining” has permanently damaged a half dozen streams in Pennsylvania, state regulators have found — a finding that could trigger deeper ...

A shear cuts coal from the side of the H-3 longwall at Enlow Fork Mine. Editor’s note: This is the fifth in a series of stories reflecting on 20 years of gas drilling in Southwestern Pennsylvania.

Oxbow Mining is selling machinery and equipment from its idle Elk Creek underground coal mine in Somerset, but continues to hope to eventually reopen the site. The company already has sold some ...

Longwall coal mines are underground mines where a large wall or slice of coal is removed in miles-long panels. The researchers used data collected over one month from a 17-geophone array on the ...

This video by mining equipment manufacturer Job Global, more educational than promotional, gives an excellent overview of longwall, versus room and pillar underground coal mining. Copper $ 4.5915 ...

The Foidel/Twenty Mile mine in Routt County ranked No. 5 in the U.S. in productivity but was the state’s top coal producer at 8.5 million tons. Coal production for underground mines changed ...

About 33 percent of all underground coal production ... Coal panels are up to 1250 ft. wide and 10,560 ft. long. Removing an average of 60 ft. of coal per day, a longwall shearer can mine a ...