Geophysical Center RAS, Moscow, Russia¹ ; The Schmidt Institute of Physics of the Earth RAS, Moscow, Russia²:

Gvishiani A. D.^1,2, Chief Scientist of Geophysical Center RAS, Head of the Department, Academician of RAS, Doctor of Physical and Mathematical Sciences
Tatarinov V. N.^1,2, Chief Researcher, Head of Laboratory, Chief Researcher, Doctor of Engineering Sciences

Geophysical Center RAS, Moscow, Russia¹ ; Mining Institute of NUST «MISiS», Moscow, Russia³:
Manevich A. I.^1,3, Researcher, Post-Graduate Student, a.manevich@gcras.ru

Geophysical Center RAS, Moscow, Russia:

Kaftan V. I., Chief Researcher, Doctor of Engineering Sciences

The results of geodynamic interpretation of the results of GNSS observations of presentday movements and modeling of the stress-strain state of the upper part of the Earth’s crust in the area of the construction of an underground research laboratory to substantiate the safety of disposal of high-level long-lived radioactive waste in granite-gneiss rocks of the Nizhne-Kansk massif are presented. The kinematic model of the area made it possible to assess the directions of block movements of large structural blocks. The greatest movement gradients were noted in the west, between the underground research laboratory site and the contact between the Siberian Platform and the West Siberian Plate along the Atamanovsky Fault. Local zones of stress concentration have been identified, in which destruction of the rock mass in the near-contour zone of underground workings is most likely. Analysis of models and results of GNSS observations showed that the structural-tectonic block, in which the construction of the underground research laboratory is planned, is in relatively calm geodynamic conditions. Present-day movements determine the regime of sublatitudinal compression in azimuth close to 100–1100 at the underground research laboratory construction site. A systematic analysis of geological and geophysical data made it possible to obtain new knowledge about the kinematics and stress-strain state of the rock mass in the southern part of the Yenisei Ridge, necessary to ensure the geoecological safety of isolation of high-level radioactive waste in the granite-gneiss rocks of the Nizhne-Kansk massif.

This work was funded by the Russian Science Foundation (project No. 18-17-00241).

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