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Propagation of EM signals in underground mines.
  • Published Date:
    September 1977
  • Language:
    English
Filetype[PDF-3.08 MB]


Details:
  • Personal Authors:
  • Corporate Authors:
    United States. Bureau of Mines. ; Collins Commercial Telecommunications Group. Circuit Switching Systems Division. ;
  • Description:
    "This report is a comprehensive summary of the results of the propagation measurements program conducted for the Bureau of Mines. Data were gathered in the medium frequency (mf) range from a cross sample of six mines representative of the industry having typical wireless requirements. From the data that were gathered, a logical method of data reduction is presented that culminates in a set of average attenuation characteristics for all mines visited. These characteristics define a typical mf wireless system when the communication range requirements are known. Direct through-the- earth propagation and the range enhancement mechanism due to coupling on-and-off conductors are evaluated and related to the planning of a typical wireless mf communications system." - NIOSHTIC-2

    NIOSHTIC no. 19770901

  • Document Type:
  • Funding:
    H00366028
  • Supporting Files:
    No Additional Files
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