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- Tasks and activities:
- Blasting
- Document types:
- Contract reports
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Results 1 - 3 of 3
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9/1/1985 - Contract reportsPresents the preliminary safe distances for blasting wiring from typical electromagnetic sources. The distances are for underground coal mines and electromagnetic sources in the frequency range below 10 mhz.
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9/1/1983 - Contract reportsThe use of electromagnetic field producing equipment in underground coal mining operations can only be expected to grow. The use of these equipment in underground mining operations is hampered by the possibility of their electromagnetic fields interacti...
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9/1/1973 - Contract reportsSix different types of blasting caps, mainly of the type used in coal mines, were evaluated to determine both their radio frequency and direct current characteristics.
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Content source: National Institute for Occupational Safety and Health, Mining Program