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Mining Publication: Electromagnetic Noise in Robena No. 4 Coal Mine
Keywords: Coal mining Power lines Statistical analysis
This page is archived for historical purposes and is no longer being maintained or updated. Contact NIOSH Mining if you need an accessible version.
Original creation date: September 1974
Authors: WD Bensema, M Kanda, JW Adams
Contract/MOA Report - September 1974
Download PDF Document (5.53 MB)
NIOSHTIC2 Number: 10001387
U.S. Department of the Interior, Bureau of Mines, Contract No. H0133005. 1974; :1-194
Two different techniques were used to make measurements of the absolute value of electromagnetic noise in an operating coal mine, Robena No. 4, located near Waynesburg, Pennsylvania. One technique measures noise over the entire electromagnetic spectrum of interest for brief time periods. With present instrumentation, the spectrum can be covered from 40Hz to 400 kHz. It is recorded using broad-band analog magnetic tape, and the noise data are later transformed to give spectral plots. The other technique records noise envelopes 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. The general results are that at frequencies below 10 kHz, power line noise within the mine is severe. Impulsive noise is severe near arcing trolleys, and at lower frequencies near any transmission line. Carrier trolley phone signals and harmonics are strong throughout the mine whenever the trolley phone is in operation.
Image of publication Electromagnetic Noise in Robena No. 4 Coal MineContract/MOA Report - September 1974
Download PDF Document (5.53 MB)
NIOSHTIC2 Number: 10001387
U.S. Department of the Interior, Bureau of Mines, Contract No. H0133005. 1974; :1-194
See Also
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Development of Guidelines for the Design of Support Systems to Manage Coal Mine Rib Hazards
Elastic and Shear Moduli of Coal Measure Rocks Derived from Basic Well Logs Using Fractal Statistics and Radial Basis Functions
Electromagnetic Noise in Grace Mine
Electromagnetic Noise in Itmann Mine
Electromagnetic Noise in Lucky Friday Mine
Electromagnetic Noise in McElroy Mine
Frictional Ignitions in Underground Bituminous Coal Operations 1983-2005
A Hybrid Statistical-Analytical Method for assessing Violent Failure in U.S. Coal Mines
Passive Fiber Optic System for Locating, Tracking, and Communicating with Personnel in Coal Mines
Peak Methane Concentrations During Coal Mining: An Analysis
Refuge Alternatives in Underground Coal Mines
Remote Methane Sensors
Surface Magnetic Field Noise Measurements at Geneva Mine
Wireless Mesh Mine Communication System
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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