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Geoinformatika 2017; 3(63) : 30-36  (in Russian)  

DEFINING THE 2D SURFACE OF THE ANOMALY PLASTIC HIERARCHICAL OBJECT LOCATED IN THE LAYERED BLOCKED GEOLOGICAL MEDIUM, USING THE DATA OF ACOUSTIC MONITORING

O.A. Hachay1, A.Y. Khachay2, O.Y. Khachay2

1Institute of Geophysics, Ural Branch of of the Russian Academy of Sciences, 100, Amundsen Str., Ekaterinburg, 620016, Russian Federation, e-mail: olgakhachay@yandex.ru
2Ural Federal University, 19, Mira Str., Ekaterinburg, 620002, Russian Federation, e-mail: andrey.khachay@gmail.com, khachay@yandex.ru

Purpose. Geological medium is an open system influenced by outer and inner factors that can bring it to an unstable state. That non stability as a rule occurres locally and these zones are named dynamically active elements, being indi­cators of potential catastrophic sources. These objects differ from the embedded geological medium in their structural forms, which are often of the hierarchical type. The process of their activisation can be investigated using wave fields monitoring. For that purpose we developed earlier new algorithms of modeling wave field propagation through the local objects with a hierarchical structure. Here we have worked out a new approach to interpreting the distribution of wave fields to define the contours of these local plastic hierarchical objects.
Design/methodology/approach. We have developed an algorithm for constructing the equation of the theoretical inverse problem for a 2-D linear polarized longitudinal elastic wave by excitation of the N-layered elastic medium with hierarchic plastic inclusion located in the ν–th elastic layer. We also suggest an iteration process of solving the inverse problem for the case of certain configurations of hierarchical inclusions 2D k-th rank.
Findings. Theory proves that for such a complicated medium each wave field contains its own information about the inner structure of the hierarchical inclusion. Therefore it is ncessary to interpret the monitoring data for each wave field apart, and not mixes the data base. When interpreting the results of the monitoring it is necessary to use the data of such systems that are configured to study the hierarchical structure of the medium.
Practical value/implications. These results may serve as a basis for constructing new systems of monitoring observa­tions of dynamical geological systems. They may be useful, in particular, in preventing rock shocks in deep mines by their exploitation or natural hazards. Moreover, the findings could prove inevitable in developing new systems of oil and gas out working using mining approaches.

Keywords: hierarchic medium, seismic field, algorithms of interpretation, equation of theoretical inverse problem.

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