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Room and pillar
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81	stance. ¾¾The depth of cover was 700 feet or greater in 77 percent of the fatalities. ¾¾The mining height exceeded 7 feet in every instance but one. ¾¾Other conditions that have contributed to rib fall fatalities i Add to Reading List Source URL: www.msha.gov Language: English - Date: 2014-07-18 14:46:33 Mine Safety and Health Administration Safety engineering Longwall mining Room and pillar Underground mining Mining Coal mining
82	Geology and Mining Conditions - Ground Control for Underground Gold Mines Add to Reading List Source URL: www.msha.gov Language: English - Date: 2014-07-18 14:46:10 Technology Longwall mining Retreat mining Room and pillar Gob Coal mine bump Mine Safety and Health Administration Underground mining Mining Coal mining
83	Geology and Mining Conditions - Ground Control for Underground Gold Mines Add to Reading List Source URL: www.msha.gov Language: English - Date: 2014-07-18 14:46:10 Technology Longwall mining Retreat mining Room and pillar Gob Coal mine bump Mine Safety and Health Administration Underground mining Mining Coal mining
84	Microsoft Word - Bell Island Mine Wabana.doc Add to Reading List Source URL: www.heritagefoundation.ca Language: English - Date: 2011-12-19 11:48:07 Room and pillar Conception Bay Iron ore Mining in Cornwall and Devon Industrial Cape Breton Underground mining Mining Bell Island
85	Microsoft Word - SAEON PAPER - Vaal Water quality SHORT VERSION with diagrams Add to Reading List Source URL: aurecon.webfoundryza.com Language: English Technology Water Longwall mining Coal Witbank Groundwater Open-pit mining Acid mine drainage Room and pillar Mining Coal mining Underground mining
86	DIRECTORY OF COAL MINES IN ILLINOIS Marion Add to Reading List Source URL: www.isgs.illinois.edu Language: English - Date: 2013-09-26 10:59:06 Room and pillar Mining Odin Illinois Underground mining Coal mining Longwall mining
87	PDF Document Add to Reading List Source URL: www.dnr.state.oh.us Language: English - Date: 2005-04-15 14:52:36 Coal Technology Millfield Mine disaster Room and pillar Coal mine bump Subsidence Coal seam fire Surface mining Longwall mining Underground mining Coal mining Mining

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