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Evaluation of the seismic system for locating trapped miners

Performance evaluation of electromagnetic techniques for the location of trapped miners

Vertical magnetic noise in the voice frequency band within and above coal mines

Apparent earth conductivity over coal mines as estimated from through-the-earth electromagnetic transmission tests

Published Year

• 1980-1989 (4) *

Subject

• Coal mines and mining--Communication systems (1)
• Coal mines and mining--United States (1)
• Earth resistance (Geophysics)--Measurement (1)
• Earth resistance--Measurement (1)
• Electromagnetic fields (1)
• Electromagnetic noise (1)
• Electromagnetic waves--Transmission--Measurement (1)
• Mine rescue work--Equipment and supplies (1)
• Mine rescue work--Equipment and supplies--Evaluation (1)
• Seismometers (1)
• Signal processing (1)
• Voice frequency (1)

Author

• Durkin, John. (4) *
• Greenfield, Roy. (1)

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