Electromagnetic survey method applicable to underground quarries; proceedings of thru-the-earth electromagnetics workshop
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Electromagnetic survey method applicable to underground quarries; proceedings of thru-the-earth electromagnetics workshop
Filetype[PDF-739.67 KB]


Details:
  • Personal Author:
  • Conference Authors:
    Thru-the-Earth-Electromagnetics Workshop (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 of a magnetic antenna transmitter buried at a depth h in the earth. The method and the equipment achieved are called R. E. P. E. (Relevé Electromagnétique de Points Enterrés). They are daily used to accurately survey old quarries by using triangulation instruments at the surface of the earth rather than in galeries where the setting difficulties considerably reduce their accuracy and increase the work length. The results of several surveys allow us to give the optimum working conditions of the instruments and show that, when the transmitter is at a 20 meters depth, its position is known at the surface with an error lower than 1 centimeter. The power transmitter is of about 8 watts and we can find its location with an error smaller than 1 meter when buried at a depth of about 100 meters. This equipment may be successfully used for location of subsurface miners. The space surrounding the transmitter must then be free from ferromagnetic bodies.
  • Document Type:
    Book Chapter
  • Collection(s):
    National Institute for Occupational Safety and Health
  • Main Document Checksum:
  • File Type:
  • Supporting Files:
    No Additional Files
    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 different coordinate systems, an analytic solution requires that the boundaries, both external and inter...
      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 conducting half -space which consists of regions of different conductivities. A numerical method is use...
      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 produce promising results with the type of equipment that was available then [5] . With advancements in s...
      File Type:
      Filetype[PDF - 1010.41 KB]
    4. Filetype[PDF - 31.08 KB]
      Personal Author:
      Dolphin, Lambert; Bollen, Robert; Oetzel, George;
      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 in the mine 100 to 130 feet from the surface gave intense, well-defined echoes consistent with an ave...
      File Type:
      Filetype[PDF - 31.08 KB]
    5. Filetype[PDF - 326.47 KB]
      Personal Author:
      Fontaine, J.; Demoulin, B.; Degauque, P.; Gabillard, 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. 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 bearing an important surface transfer impedance like a transmission line with an inductive coupling t...
      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, Bureau of Mines has carried out communications research aimed at developing whole mine communications ...
      File Type:
      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 is very broad in its defined scope, we will be conscious of the specific applications to mine rescue ...
      File Type:
      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 mine uses different types of equipment. In addition, some surface measurements of noise have been m...
      File Type:
      Filetype[PDF - 37.61 KB]
    9. Filetype[PDF - 500.48 KB]
      Personal Author:
      Emslie, Alfred G.; Lagace, Robert L.; Strong, Peter 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. 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 strength along a tunnel, and from one tunnel to another around a comer. Of prime interest are the nat...
      File Type:
      Filetype[PDF - 500.48 KB]
    10. 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
      File Type:
      Filetype[PDF - 640.36 KB]
    11. 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 allow surviving miners to make their circumstances known to rescue teams. Various communications techniq...
      File Type:
      Filetype[PDF - 370.87 KB]
    12. Filetype[PDF - 193.64 KB]
      Personal Author:
      Delogne, P.; Deryck, L.; Liegeois, 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. 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 this tunnel with a low attenuation only if their frequency is higher than a so-called critical freque...
      File Type:
      Filetype[PDF - 193.64 KB]
    13. 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 application of a formal zonal-harmonic series solution to directly obtain numerical results involve...
      File Type:
      Filetype[PDF - 522.62 KB]
    14. 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) spherical; (iii) oblate spheroidal; (iv) parallel plate; (v) parallel plate with protruding dielec...
      File Type:
      Filetype[PDF - 27.45 KB]
    15. 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 documented. Reasonably complex descriptions of the effects of stratification also are reported. However, a...
      File Type:
      Filetype[PDF - 273.87 KB]
    16. Filetype[PDF - 249.63 KB]
      Personal Author:
      Bannister, Peter R.; Williams, Frederick J.; Katan, J. Robert; Ball, John 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. 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 Wisconsin and Texas) produced by both the elevated and (newly installed) buried Wisconsin Test Facilit...
      File Type:
      Filetype[PDF - 249.63 KB]
    17. Filetype[PDF - 346.24 KB]
      Personal Author:
      Goddard, Arthur 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. 54-61
      Series:
      Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines
      Description:
      Radio propagation measurements were conducted in a coal mine at UHF (200 to 1000 MHz) and VLF (1 to 50 kHz) to characterize the transmission loss of intra-mine paths. The basic experimental parameters included frequency, polarization, path orientatio...
      File Type:
      Filetype[PDF - 346.24 KB]
    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 Bureau of Mines' requirements for detecting and locating trapped miners by electromagnetic methods. The...
      File Type:
      Filetype[PDF - 288.74 KB]
    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 magnetic field components has been investigated by Wait (1971). , For sufficiently low frequencies, the ma...
      File Type:
      Filetype[PDF - 186.51 KB]
    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 discussed which uses a periodic video-type pulse containing a wide frequency range. A video pulse is us...
      File Type:
      Filetype[PDF - 354.63 KB]

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    The use of radio signals for underground communications was considered as early as the mid-1920's [1] - [4] . However, early experiments did not produce promising results with the type of equipment that was available then [5] . With advancements in s...
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    Filetype[PDF - 1010.41 KB]
  4. Filetype[PDF - 31.08 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
    Description:
    An electromagnetic sounder developed for an archaeological application in Egypt has been successfully tested in a California dolomite mine. Chambers in the mine 100 to 130 feet from the surface gave intense, well-defined echoes consistent with an ave...
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  5. Filetype[PDF - 326.47 KB]
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    Fontaine, J.; Demoulin, B.; Degauque, P.; Gabillard, R.;
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    Thru-the-Earth-Electromagnetics Workshop (1973 : Colorado School of Mines)
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    Proceedings of Thru-the-Earth Electromagnetics, August 15-17,1973, Colorado School of Mines, p. 130-139
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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 bearing an important surface transfer impedance like a transmission line with an inductive coupling t...
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