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A study of RF hazards at low and medium frequencies to blasting in underground coal mines.

Authors
Thompson-RH; Stuart-JG; Cipkins-AW
Source
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, Contract No. J0318023, :1-314
NIOSHTIC No.
10005910
Abstract
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.
Keywords
Mining-industry; Electromagnetic-energy; Electromagnetic-fields; Electromagnetic-interference; Electromagnetic-radiation; Statistical-analysis; Underground-mining; Radio-waves
Publication Date
19850101
Document Type
CP; Final Contract Report
Funding Type
Contract
Fiscal Year
1985
NTIS Accession No.
PB88-130097
NTIS Price
A15
Identifying No.
OFR-45-87; Contract-J0318023
NIOSH Division
PRC
Source Name
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, Contract No. J0318023
State
PA
Performing Organization
Franklin Research Center
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