Published on 17 February 2022
The paper investigates the phenomenon of radon emanation in various geological conditions – rocks, thick boulderpebble strata and a powerful landslide. Instrumental measurements of micro-seismic vibrations, radon volumetric activity (RAR) were carried out, and long-term values of the gravitational movement of the soil strata were determined on the largest Loire landslide in North Ossetia. A low OAR level was obtained, which did not exceed during the experiment (0.6 Bq/m3). It has been established that the concentration of radon can reflect the degree of enrichment in underground cracks and, therefore, information about geological cracks and the stress state of a landslide body. It has been determined that the analysis of radon anomalies can be used as an independent method for assessing the state of landslide and providing an objective scientific basis for assessing the stability of mountain slopes. The purpose of this work was to study the relationship between radon emanation and the level of external impact on the basis of monitoring large landslides in mountainous areas. Research results. As a result of the research, a low OAR level was obtained, not exceeding 0.6 Bq/m3 during the experiment. It has been established that the concentration of radon can reflect the degree of enrichment in underground cracks and, therefore, information on geological fracturing, the stress-strain state of a dispersed landslide body. This phenomenon was expressed in the fact that an increase in the amplitudes of the micro-seismic background manifests itself with a delay in an increase in the RAR or the “aftereffect time tp of radon”, after which a targeted effect on the environment or pulse-vibration processes in the environment itself, characterized by intense fluctuations, cause an increase in the intensity of radon emanation on surface. It has been established that the analysis of radon anomalies can be used as an independent method for assessing the stress-strain state of a landslide by analyzing the statistical characteristics of microscale events and, thus, providing an objective scientific basis for operational assessments of the stability of mountain slopes.
Tags: оползни, радон, объемная активность, геофизические следования, микросейсмы.
ISSN 1998-4502 (Print) ISSN 2499-975Х (Online)