Electromagnetic Noise in Lucky Friday Mine

Details

• Personal Author:
  Adams, John W. ; Bensema, W. D. ; Dobroski, Harry Jr. ; Scott WW
• Description:
  Measurements of the absolute value of electromagnetic noise and attenuation along a hoist rope were made in an operating hard-rock mine, Lucky Friday Mine, located near Wallace, Idaho. Spectra of electromagnetic noise generated by various pieces of equipment, spectra of specific noise signals at various depths, and noise and attenuation on the 4250 foot (1295 meter) hoist, were measured. Three techniques were used to make the measurements. First, noise was measured over the entire electromagnetic spectrum of interest for brief time periods. Data were recorded using broadband analog magnetic tape for later transformation to spectral plots. Second, noise amplitudes were recorded at several discrete frequencies for a sufficient amount of time to provide data for amplitude probability distributions. A third technique gave attenuation data through the direct measurement of field strength at various depths. The specific measured results are given in a number of spectral plots, amplitude probability distribution plots, and amplitude curves as a function of depth. [Description provided by NIOSH]
• Subjects:
  Electromagnetic Phenomena Mining Occupational Health Radiation Radio Waves Safety
• Keywords:
  Electromagnetic-energy Electromagnetic-fields Electromagnetic-interference Electromagnetic-radiation Hard-rock-mines Mining-industry Radio-waves Statistical-analysis Underground-mining
• Series:
  Mining Publications
• Subseries:
  Open File Report
• Document Type:
  Text
• Funding:
  Contract
• Genre:
  Conference Publications ; Final Contract Report
• Place as Subject:
  Colorado ; Idaho ; OSHA Region 10 ; OSHA Region 3 ; OSHA Region 8 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PRC - Pittsburgh Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-129
• NIOSHTIC Number:
  nn:10008119
• NTIS Accession Number:
  COM-75-10258
• Citation:
  Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, Contract No. HO133005, :1-129
• Federal Fiscal Year:
  1975
• Performing Organization:
  National Bureau of Standards
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:ae79c9e05f0532f5d0ea8df6a91088df60cd679dfb8ad36e1327990f3906c0cdb23a971c879c1f730cf3950f8976957b7751dd0fd1976860dd7a5b4a8f11c03d
• Download URL:
  https://stacks.cdc.gov/view/cdc/206947/cdc_206947_DS1.pdf
• File Type:
  [PDF - 4.10 MB ]