Toward Pillar Design to Prevent Collapse of Room-and-Pillar Mines

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Date: 2012-08-30 15:10:16 Land transport Room and pillar Retreat mining Pillar Coal mining Mine Safety and Health Administration Station wagon Underground mining Mining Transport		Toward Pillar Design to Prevent Collapse of Room-and-Pillar Mines Add to Reading List Source URL: www.cdc.gov Download Document from Source Website File Size: 865,21 KB Share Document on Facebook

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