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- Research methods and measures:
- Weak rock
- Document types:
- Information Circulars
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10/1/2003 - Information CircularsThis report describes the geologic origin, association, and potential danger from the most common hazards. Discussions of weak rock include drawrock, rider coals, head coal, stackrock, and stream valley effects.
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Content source: National Institute for Occupational Safety and Health, Mining Program