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- Equipment, tools, and parts:
- Geophones
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1/1/1976 - Reports of InvestigationsA seismic system which utilizes in-mine geophones to detect trapped miners has been developed. Tests at the Bureau of Mines safety research mine at Bruceton, Pennsylvania, and at two operating mines indicate such a system has a maximum detection range i...
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Content source: National Institute for Occupational Safety and Health, Mining Program