TO THE ESTIMATE OF STRESS-STRAIN STATE OF THE ROCK MASS IN THE NIZHNEKANSKY REGION

Abstract

Practical geomechanics is based on an integrated approach, which assumes involving the results of geological, seismological, geophysical and other observations in order to increase the reliability of analytical solutions and to ensure the completeness and quality of interpretation of instrumental control data. The paper provides an example of the implementation of such an approach. When assessing the stress-strain state of the Nizhnekansky region, information on the geological characteristics of the object, as well as data on seismicity and seismotectonic deformations of the Earth’s crust in the Altai - Sayan region and Baikal rift zone were used. As a result of a systematic integrated analysis of geological and seismotectonic information, it was found that junction of the Siberian platform and the West Siberian plate in the area of Nizhnekansky granitoid massif should be related to a region with an average degree of tectonic activity. The territory of the right bank of the Yenisei is characterized by a regional compression field of near-latitudinal orientation. The results of instrumental stress control by hydraulic fracturing method in local zones of the rock mass at a depth of 260 m are presented. It is determined that the rock mass has a significant margin of safety with respect to the parameters of active stress field.