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GENERAL ISSUES OF GEOMECHANICS
ArticleName Hierarchical approach to assessing sustainability of geological environment in geomechanical studies
DOI 10.17580/gzh.2024.01.03
ArticleAuthor Tatarinov V. N., Akmatov D. Zh., Manevich A. I., Shevchuk R. V.
ArticleAuthorData

Geophysical Center, Russian Academy of Sciences, Moscow, Russia1 ; Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia2

V. N. Tatarinov1,2, Head of Laboratory, Chief Researcher, Doctor of Engineering Sciences, Corresponding Member of the Russian Academy of Sciences

 

Geophysical Center, Russian Academy of Sciences, Moscow, Russia1 ; NUST MISIS, Moscow, Russia2

D. Zh. Akmatov1,2, Junior Researcher, d.akmatov@gcras.ru
A. I. Manevich1,2, Researcher, Senior Lecturer

 

Geophysical Center, Russian Academy of Sciences, Moscow, Russia1 ; Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia2 ; NUST MISIS, Moscow, Russia3

R. V. Shevchuk1,2,3, Junior Researcher

Abstract

The article presents a description of a hierarchical approach to assess the sustainability of the geological environment in geomechanical studies. The results of applying this approach are examined using the example of the construction of an underground research laboratory to study the possibility of underground isolation of high-level radioactive waste (HLW) in the Krasnoyarsk Region. Based on the geodynamic research, geological-geophysical work and numerical modeling at various scales, the stress–strain models of rocks were created, and a three-dimensional model of the stress–strain behavior of Yenisei site was presented. The regional level of sustainability assessment is based on the data of geodynamic monitoring (local seismic network and GNSS observations of modern movements in the Earth’s crust). The local level of sustainability assessment includes creation of a geotechnical model which comprises lithological information, tectonic faulting, intrusive formations, zones of fracturing and fragmentation, among others. The model also incorporates the results of the stress–strain analysis in the area. The boundary conditions for the numerical problem solving are based on the results of the interpretation of data from the previous hierarchical level, including a systemic analysis of geological-geophysical characteristics of the geological environment, tectonic fault schemes, geophysical and GNSS observation data, external stress field parameters, physical and mechanical properties of rocks, results of rock fracturing determination, etc. The local level of sustainability assessment is applied to a scale comparable to underground mining operations. Based on the geological testing data and the local stress–strain modeling results, the stability of underground openings in the complex geological and geotechnical conditions is analyzed. The proposed systemic-hierarchical approach is applied to assess preservation of the isolation properties of rock mass when justifying the safety of burying high-level radioactive waste in granitoid–gneiss rocks of the Nizhne-Kansk Massif.
This work was conducted in the framework of budgetary funding of the Geophysical Center of RAS, adopted by the Ministry of Science and Higher Education of the Russian Federation.

keywords Sustainability, system analysis, hierarchical approach, stress–strain behavior, modeling, rock mass classification, radioactive waste.
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