Estimating geodynamic hazard in mining regions; [К ОЦЕНКЕ СТЕПЕНИ ГЕОДИНАМИЧЕСКОЙ ОПАСНОСТИ В ГОРНОПРОМЫШЛЕННОМ РАЙОНЕ]

The concept of the critical stress state of the Earth's crust is used to address the issue of the geodynamic hazard estimation in a mining region. In terms of Kuzbass and using the data on depths of hypocenters of induced seismic events, the thickness of the critical stress layer at the crustal top, which is one of the most significant factors to govern the geodynamic hazard, is evaluated. The depths of hypocenters of induced seismic events are determined at sufficient reliability, and these data allow tracing their change and comparing the resultant estimates with the block structure of Kuzbass, found in the 1980s by the method of geodynamic zoning. The crustal faults of rank II separate different thickness blocks in the crustal layer supposed to be in the critical stress state and having the thickness ranging from 2.1 km to 4-5 km according to the present studies. The data on the depths of hypocenters of induced earthquakes enable zoning of the Kuzbass area by the geodynamic hazard criterion which increases north-southward. The further research is to explore response of rock mass to the large-scale induced impact, including reactivation of intra-block tectonic faults and contribution of this process to subsurface degassing. © 2022 Publishing house Mining book. All rights reserved.