mining Glossary of coal mining terminology Notes External links University of Wollongong (Australia). Educational resource on longwall mining. Bauer, Robert A. Planned Coal Mine Subsidence in Illinois: A Public Information Booklet Illinois Department of Natural Resources, Illinois State Geological Survey, Circular 573, 2008 Hidden Costs of Clean Coal Project The Center for Public Integrity International Longwall News News and information resource dedicated solely to longwall mining Mine Subsidence Board NSW Government The Mine Subsidence Technological Society The Institute of Engineers, Australia Coal mining Underground mining