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- Research methods and measures:
- Statistical analysis
- Document types:
- Reports of Investigations
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1/1/1974 - Reports of InvestigationsMethane concentration peaks were measured at coal mine working faces during entry development. The statistical distribution of peaks was found to be normal or log normal depending on how well the methane was being mixed into the ventilation airstream.
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Content source: National Institute for Occupational Safety and Health, Mining Program