Mining Publication: Electromagnetic Noise in Grace Mine

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Original creation date: September 1974

Authors: JW Adams, WD Bensema, M Kanda

Contract/MOA Report - September 1974

NIOSHTIC2 Number: 10001384

U.S. Department of the Interior, Bureau of Mines, Contract No. H0133005. NTIS No. Com/741-1687, 1974; :1-127

Two different techniques were used to make measurements of the absolute value of electromagnetic noise in an operating hardrock mine, Grace Mine, located near Morgantown, Pennsylvania. Diesel-powered haulage equipment is used in this mine, and the electromagnetic noise environment it creates was measured to see how it differs from the environment created by electric-powered haulage equipment. One technique measures noise over the entire electromagnetic spectrum of interest for brief time periods. It is recorded using broadband analog magnetic tape, and the noise data is later transformed to give spectral plots. The other technique records noise amplitudes at several discrete frequencies for a sufficient amount of time to provide amplitude probability distributions. The specific measured results are given in a number of spectral plots and amplitude probability distribution plots.

Image of publication Electromagnetic Noise in Grace Mine
Contract/MOA Report - September 1974

NIOSHTIC2 Number: 10001384

U.S. Department of the Interior, Bureau of Mines, Contract No. H0133005. NTIS No. Com/741-1687, 1974; :1-127


Page last reviewed: September 21, 2012
Page last updated: September 21, 2012