Impacts of Contour Coal Mining on Streamflow, a Case Study,
Strippable Reserves of Coal and Lignite in the United States, January 1, 1968, by Rank of Coal, Sulfur Category, and Coal Province 7. Strippable Resources and Reserves of Bituminous Coal in Tennessee, January 1, 1968, by County . . . . . 80 Area Disturbed by Strip Coal Miningcoal mining | Auger mining - Students | Britannica Kids,,coal mining - Auger mining - 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.Mine Tailings Disposal Methods,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 the hill.