Radio propagation measurements in coal mines at UHF and VLF
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Radio propagation measurements in coal mines at UHF and VLF

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    1. Filetype[PDF - 123.86 KB]
      Personal Author:
      Rankin, David
      Conference Authors:
      Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines)
      Published Date:
      1973
      Source:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 92-94
      Series:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines
      Description:
      Three -dimensional boundary value problems are difficult to solve. Indeed, while the separation of the scalar wave equation can be effected in 11 diff...
      File Type:
      Filetype[PDF - 123.86 KB]
      File Type:
      Filetype[PDF - 123.86 KB]
    2. Filetype[PDF - 143.65 KB]
      Personal Author:
      Jones, F. W.
      Conference Authors:
      Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines)
      Published Date:
      1973
      Source:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 86-91
      Series:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines
      Description:
      The perturbation of alternating electromagnetic fields by three-dimensional structures is considered. The general model is that of a semi-infinite con...
      File Type:
      Filetype[PDF - 143.65 KB]
      File Type:
      Filetype[PDF - 143.65 KB]
    3. Filetype[PDF - 1010.41 KB]
      Personal Author:
      Farstad, Arnold J.
      Conference Authors:
      Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines)
      Published Date:
      1973
      Source:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 62-72
      Series:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines
      Description:
      The use of radio signals for underground communications was considered as early as the mid-1920's [1] - [4] . However, early experiments did not produ...
      File Type:
      Filetype[PDF - 1010.41 KB]
      File Type:
      Filetype[PDF - 1010.41 KB]
    4. Filetype[PDF - 31.08 KB]
      Personal Author:
      Dolphin, Lambert ; Bollen, Robert ; ...
      Conference Authors:
      Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines)
      Published Date:
      1973
      Source:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 168
      Series:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines
      Description:
      An electromagnetic sounder developed for an archaeological application in Egypt has been successfully tested in a California dolomite mine. Chambers i...
      File Type:
      Filetype[PDF - 31.08 KB]
      File Type:
      Filetype[PDF - 31.08 KB]
    5. Filetype[PDF - 326.47 KB]
      Personal Author:
      Fontaine, J. ; Demoulin, B. ; ...
      Conference Authors:
      Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines)
      Published Date:
      1973
      Source:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 130-139
      Series:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines
      Description:
      To realize a radiowave communication along mine galleries a few kilometers long without repeater, we show that it is possible to use a coaxial cable b...
      File Type:
      Filetype[PDF - 326.47 KB]
      File Type:
      Filetype[PDF - 326.47 KB]
    6. Filetype[PDF - 502.00 KB]
      Personal Author:
      Parkinson, Howard E.
      Conference Authors:
      Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines)
      Published Date:
      1973
      Source:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 1-8
      Series:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines
      Description:
      In 1969, new coal mine health and safety legislation was enacted in the United States. As a result of this legislation, the Department of Interior, Bu...
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      Filetype[PDF - 502.00 KB]
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      Filetype[PDF - 502.00 KB]
    7. Filetype[PDF - 232.46 KB]
      Personal Author:
      Wait, James R.
      Conference Authors:
      Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines)
      Published Date:
      1973
      Source:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 9-14
      Series:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines
      Description:
      It is the purpose of this paper to review theoretical model concepts in through- the -earth transmission of electromagnetic waves. While the subject i...
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      Filetype[PDF - 232.46 KB]
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      Filetype[PDF - 232.46 KB]
    8. Filetype[PDF - 37.61 KB]
      Personal Author:
      Adams, John W.
      Conference Authors:
      Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines)
      Published Date:
      1973
      Source:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 169
      Series:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines
      Description:
      The present status of the National Bureau of Standards program is that many magnetic tapes of analog data have been recorded in four major mines. Each...
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      Filetype[PDF - 37.61 KB]
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      Filetype[PDF - 37.61 KB]
    9. Filetype[PDF - 739.67 KB]
      Personal Author:
      Gabillard, R. ; Dubus, J. P. ; ...
      Conference Authors:
      Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines)
      Published Date:
      1973
      Source:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 121-129
      Series:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines
      Description:
      We present an electromagnetic method taken from the well known radiogoniometer that allows us to locate at the surface of the ground the vertical axis...
      File Type:
      Filetype[PDF - 739.67 KB]
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      Filetype[PDF - 739.67 KB]
    10. Filetype[PDF - 500.48 KB]
      Personal Author:
      Emslie, Alfred G. ; Lagace, Robert L. ; ...
      Conference Authors:
      Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines)
      Published Date:
      1973
      Source:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 38-48
      Series:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines
      Description:
      This paper is concerned with the theoretical study of UHF radio communication in coal mines, with particular reference to the rate of loss of signal s...
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      Filetype[PDF - 500.48 KB]
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    11. Filetype[PDF - 640.36 KB]
      Personal Author:
      Roetter, Martyn F.
      Conference Authors:
      Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines)
      Published Date:
      1973
      Source:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 202-217
      Series:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines
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      Filetype[PDF - 640.36 KB]
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    12. Filetype[PDF - 370.87 KB]
      Personal Author:
      Geyer, Richard G.
      Conference Authors:
      Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines)
      Published Date:
      1973
      Source:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 20-33
      Series:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines
      Description:
      One aspect of a program to improve the chances of survival following coal mine disasters is the development of a communications system which will allo...
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      Filetype[PDF - 370.87 KB]
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    13. Filetype[PDF - 193.64 KB]
      Personal Author:
      Delogne, P. ; Deryck, L. ; ...
      Conference Authors:
      Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines)
      Published Date:
      1973
      Source:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 48-53
      Series:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines
      Description:
      So far as the propagation of electromagnetic waves is concerned, an underground tunnel behaves like a pipe or hollowed waveguide. Waves propagate in t...
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      Filetype[PDF - 193.64 KB]
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    14. Filetype[PDF - 522.62 KB]
      Personal Author:
      Lewis, Richard L.
      Conference Authors:
      Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines)
      Published Date:
      1973
      Source:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 98-103
      Series:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines
      Description:
      This is a discussion of the application of the zonal harmonic series to problems involving dipole sources in the vicinity of spherical boundaries. The...
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      Filetype[PDF - 522.62 KB]
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      Filetype[PDF - 522.62 KB]
    15. Filetype[PDF - 27.45 KB]
      Personal Author:
      Franceschetti, Giorgio
      Conference Authors:
      Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines)
      Published Date:
      1973
      Source:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 162-167
      Series:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines
      Description:
      Explicit expressions are presented for the input admittance and effective height of several buried metal antennas, namely: (i) prolate spheroidal; (ii...
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      Filetype[PDF - 27.45 KB]
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    16. Filetype[PDF - 273.87 KB]
      Personal Author:
      Starkey, D. B.
      Conference Authors:
      Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines)
      Published Date:
      1973
      Source:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 140-148
      Series:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines
      Description:
      nvestigation into the expressions of the field produced by a loop over a conducting half space or in an infinite conducting half space are well docume...
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      Filetype[PDF - 273.87 KB]
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    17. Filetype[PDF - 249.63 KB]
      Personal Author:
      Bannister, Peter R. ; Williams, Frederick J. ; ...
      Conference Authors:
      Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines)
      Published Date:
      1973
      Source:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 162-167
      Series:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines
      Description:
      During the last week in March and the first week in April, 1973, the Naval Underwater Systems Center measured the 76 Hz magnetic field strength (in Wi...
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      Filetype[PDF - 249.63 KB]
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    18. Filetype[PDF - 288.74 KB]
      Personal Author:
      Farstad, Arnold J.
      Conference Authors:
      Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines)
      Published Date:
      1973
      Source:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 171-177
      Series:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines
      Description:
      The Location Group conversed in the Petroleum Room of the Green Center with the purpose of addressing the following list of topics in light of the Bur...
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      Filetype[PDF - 288.74 KB]
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    19. Filetype[PDF - 186.51 KB]
      Personal Author:
      Hill, D. A. ; Wait, J. R. ;
      Conference Authors:
      Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines)
      Published Date:
      1973
      Source:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 81-85
      Series:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines
      Description:
      The feasibility of locating a buried vertical magnetic dipole source (horizontal loop) from surface measurements of the vertical and horizontal magnet...
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      Filetype[PDF - 186.51 KB]
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    20. Filetype[PDF - 354.63 KB]
      Personal Author:
      Moffatt, David L.
      Conference Authors:
      Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines)
      Published Date:
      1973
      Source:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 112-120
      Series:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines
      Description:
      Considerable current interest is evident[l,2] in the use of transient electromagnetic methods for subsurface remote sensing. A transient method is dis...
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      Filetype[PDF - 354.63 KB]
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      Filetype[PDF - 354.63 KB]

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    Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines)
    Published Date:
    1973
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    Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 168
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    Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines
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    An electromagnetic sounder developed for an archaeological application in Egypt has been successfully tested in a California dolomite mine. Chambers i...
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  5. Filetype[PDF - 326.47 KB]
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    Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines
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    To realize a radiowave communication along mine galleries a few kilometers long without repeater, we show that it is possible to use a coaxial cable b...
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