| Document Date: 2014-07-18 14:46:10
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Company Deep Cover Coal Mines Coal / / Country United States / / Event Layoffs / / Facility Mine Planning/Pillar Design / Retreat Mining / Retreat Mining Pillar Stability / / IndustryTerm numerical modeling software / retreat mining operations / particular software / retreat mining plan / longwall face equipment / pillar retreat mining / mining / metal guarding / protective equipment / nearby mining operations / retreat mining activity / longwall mining / retreat mining / room-and-pillar retreat mining operations / prevention of pillar failure / / Organization U.S. Department of Labor Mine Safety and Health Administration / / Person Richard Stickler / / Position Acting Assistant Secretary / / URL www.msha.gov / /
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Geology and Mining Conditions - Ground Control for Underground Gold Mines