Mining Publication: A Study of RF Hazards at Low and Medium Frequencies to Blasting in Underground Coal Mines
Original creation date: September 1985
This paper presents 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. The distances are based on measurements performed at three locations in each of three coal mines. The measurement apparatus, measurement procedure, measurement results, and the rationale used in the calculation of the safe distances are all described. The safe distances presented are dependent on the measurement results and their interpretation. More measurements are clearly necessary to establish the validity of the suggested distances.
Authors: RH Thompson, JG Stuart, WW Cipkins
Contract/MOA Report - September 1985
NIOSHTIC2 Number: 10005910
Franklin Research Center. U.S. Department of the Interior, Bureau of Mines, Contract No. J0318023. NTIS No. PB 88-130097, 1985; :1-313
See Also
- Blast Wave Propagation in Underground Mines
- A Century of Bureau of Mines/NIOSH Explosives Research
- Fatal Accidents Due to Flyrock and Lack of Blast Area Security and Working Practices in Mining
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- Low Temperature Limits for Mixing Recycled Oil, Diesel Fuel, and Ammonium Nitrate to Make ANFO-Type Blasting Agents
- Pressure Monitoring and Observed Effects of Mining at the Oak Grove, AL, Coalbed Degasification Pattern
- Safe Distances for Blasting Wiring from Commonly Encountered Underground Electromagnetic Energy Sources
- A Summary of Fatal Accidents Due to Flyrock and Lack of Blast Area Security in Surface Mining, 1989 to 1999
- Technology News 522 - Blast Area Security: Flyrock Safety
- Toolbox Training on Flyrock Awareness
- Page last reviewed: 9/21/2012
- Page last updated: 9/21/2012
- Content source: National Institute for Occupational Safety and Health, Mining Program