Pillar and Roof Span Design Guidelines for Underground Stone Mines by National Institute Fo Safety and Health, D. Human Services, Centers for Disease Cont And Prevention

Pillar and Roof Span Design Guidelines for Underground Stone Mines

National Institute Fo Safety and Health, D. Human Services, Centers for Disease Cont And Prevention

76 pages • missing pub info (editions)

nonfiction art health technology informative medium-paced
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Description

Underground stone mines in the United States use the room-and-pillar method of mining in generally flat-lying bedded formations. Pillar and roof span stability are two essential prerequisites for safe working conditions in room-and-pillar mines. U...

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