DETECTION OF ANOMALOUS ZONES BY THE CONTINUATION METHOD IN UNDERGROUND ELECTRIC EXPLORATION

It is often very important to detect small-amplitude tectonic disturbances in coal mines. This task is solved using the geophysical methods, in particular, the underground electric exploration. The main difficulty in this case is the inverse problems solving. The solution should unambiguously produce coordinates of anomalous electric conductivity zones associated with the low-amplitude tectonic disturbances. For the method of equatorial dipole parallel electrical sounding applied in the Kuzbass mines, the best approach to the inverse problems solving is the continuation method. The article discusses the technology proposed by K.M. Ermokhin: the measurements are presented in the form of the Fourier–Chebyshev series; the series is reduced to an exponential function; the exponential function is replaced by the continued fraction for the extensions to the plane of complex numbers, which is connected with different domains of convergence of the series and the fraction; the continued fraction is constructed by Viskovatov’s method; the analytic function is calculated using the corresponding coordinates; the maximums (poles) of the function conform with the anomalous values. Based on Ermokhin’s procedure, the electric resistivity tomography program is developed for underground electric exploration, and the application of the program is described in the article.

Keywords

Electric exploration, analytic continuation, anomalous zone, equatorial dipole electrical sounding.

Issue number: 6
Year: 2018
ISBN:
UDK: 550.837.31
DOI: 10.25018/0236-1493-2018-6-0-107-112
Authors: Gaysin R. M., Nabatov V. V.

About authors: Gaysin R.M., Candidate of Technical Sciences, Assistant Professor, Nabatov V.V., Candidate of Technical Sciences, Assistant Professor, National University of Science and Technology «MISiS», 119049, Moscow, Russia, e-mail:ftkp@mail.ru.

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