Vishnev V. S. – Geophysical Center of the Ural Branch of RAS, Ekaterinburg, the Russian Federation.
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Interference field source model is worked out, which is created by impulse currents of electric railway traction network for
an instance where the regime of its impulse is stabilized. Methodical techniques are described, which help to single out
signals which are homogenous as far as the source structure is concerned. Mathematic formula is introduced, which
converts these signals into the values of apparent resistivity of medium. The results of experimental investigations are
examined by the example of Ekaterinburg–Tyumen railway branch section. Acquired data are compared with the results
of the other independent methods of electric prospecting and geological structure of the survey area. It has made it
possible to estimate rock resistance of the earth upper crust up to a depth of 1 km. The described method makes
it possible to get important information about geoelectrical structure of medium in unfavorable for traditional electrical
prospecting conditions.
Key words: electric railway; interference field; friendly signal; source model; apparent resistance curves.
REFERENCES
1. Vishnev V. S. [Some characteristics of technogenic electromagnetic pulsed field of railway traction network]. Ural’skii
Geofizicheskii Vestnik – Ural Geophysical Bulletin, 2003, no. 5, pp. 16–23. (In Russ.)
2. Vishnev V. S. [Determination of apparent resistance of layered medium in the method of stray currents]. Ural’skii
Geofizicheskii Vestnik – Ural Geophysical Bulletin, 2010, no. 1(16), pp. 10–16. (In Russ.)
3. Krasnobaeva A. G., Vishnev V. S., Rudneva T. L. Geoelektricheskoe stroenie verkhnei mantii po profiliu Krasnoufimsk–
Omsk: mater. mezhdun. seminara [Proc. Int. Seminar “Geoelectric structure of upper mantle by the profile Krasnoufimsk–
Omsk”]. Praga, 1972, pp. 313–320. (In Russ.)