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Geoinformatika 2019; 1(69) : 38-46

УДК 550.830, 539.3;

DEFINING OF THE 2-D SURFACES OF THE COMBINED HIERARCHICAL OBJECT LOCATED IN THE LAYERED BLOCKED GEOLOGICAL MEDIUM USING THE DATA OF ACTIVE ACOUSTIC MONITORING

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

1Institute of Geophysics UB RAS (Yekaterinburg, Russian Federation) Dr.Sci(Phys.-Math.),Leading researcher, Institute of geophysics UB RAS, Amundsen str. 100, Ekaterinburg, Russia, e-mail: olgakhachay@yandex.ru
2Ural Federal University (Yekaterinburg, Russian Federation) PhD, associated prof. URFU, 620002. Mira str. 19. Ekaterinburg, Russia, e-mail: andrey.khachay@gmail.com2Ural Federal University (Yekaterinburg, Russian Federation) PhD, associated prof. URFU, 620002. Mira str. 19. Ekaterinburg, Russia, tel. +79222247471, E mail: andrey.khachay@gmail.com.

Purpose. Geological medium is an open system which is influenced by outer and inner factors that can lead it to a unstable state. That non stability is as a rule occurred locally and these zones are named as dynamically active elements, which are indicators of potential catastrophic sources. These objects differ from the embedded geological medium by their structural forms, which often are of hierarchical type. The process of their activisation can be searched, using wave fields monitoring. For that purpose we had developed earlier new algorithms of modeling wave field propagation through the local objects with hierarchical structure. Here we had developed a new approach for interpretation the distribution of acoustic fields for defining the contours of these local plastic hierarchical objects.
Design/methodology/approach. We developed an algorithm for constructing the equation of theoretical inverse problem for 2-D linear polarized longitudinal elastic wave by excitation of the N-layered elastic medium with combined hierarchic plastic, elastic and density inclusions located in the (ν-1), ν and  (ν +1) elastic layers. An iteration process of solving the inverse problem for the case of certain configurations of hierarchical inclusions 2D l, m ,s rank is elaborated. The ranks are different and they are limited by L,M, and S data.
Findings. From the theory it is obviously that for such complicated medium when we use different wave field each field contains its own information about the inner structure of the hierarchical inclusion. Therefore it is needed to interpret the monitoring data for each wave field apart, and not mixes the data base. When interpreting the results of the monitoring need to use the data of such systems that are configured to study the hierarchical structure of the medium.
Practical value/implications. These results will be the base for constructing new systems of monitoring observations of dynamical geological systems. Especially it is needed to prevent rock shocks in deep mines by their exploitation or natural hazards.

Keywords: combined hierarchic medium, acoustic field, iteration algorithms of interpretation, new equation of theoretical inverse problem.

 

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