WorldCoal, September 2009 Author: Tom Vandergrift (AAI) As open-pit coal mines reach their economic stripping limit, operators sometimes consider alternatives, such as auger mining or highwall [...]
24th International Conference on Ground Control in Mining, Morgantown, West Virginia, USA, August 2-4, 2005 Authors: T. Vandergrift (AAI) and J. Garcia (Kennecott Energy, Colowyo Mine) With [...]
