FORECASTING AND ESTIMATION OF GEOMECHANICAL PROCESSES IN ROCKS MASSES OF A DEPOSIT

Abstract

The paper concerns the development of methods for predicting and assessing the geomechanical state of the rock
mass of deposit’s territories, of hydraulic structures, of
transport roads, and other objects of the national economy, which are located and/or will be located in different
parts of the mountain ranges and intermontane areas.
The field is located in the folded zone, in which, according
to the results of the first stage of the assessment – geological assessment of the folded zone, it was established that
it is affected by horizontal tectonic forces of a neotectonic
nature with a zonal distribution in the direction of action,
which played a decisive role in the geological structure of
the field and, accordingly, in geomechanical processes,
taking place in the rock mass of the field.
The topographic surface of the field is complex, with a dissected relief, and it is considered as highlands according
to the geomorphological classification.
In this article, the author substantiates the second stage of
zonal and phased assessment method of geomechanical
state of the rock mass – the geological and mining assessment of the rock mass using the Kara-Keche complex
structural field as an example, considering relief zones
and analytical calculation of stress distributions in the
rock mass depending on the geometric parameters of dentations with depth.
The orientation of the axes of the main compressive and
tensile tectonic stresses acting on the field at the present
stage in the formation of which the main role is played by
the meganticlinals of the folded zone, framing the Karakechinsk depression, is determined.
The zones of influence of the relief are established and the
stress distribution in the rock mass is analytically calculated depending on the geometric parameters of the ridges
with depth in each zone. The stress values exceed the
stress values obtained by A. N. Dinnik.
The zones of influence of tectonic disturbances on the orientation and sign of stress vectors, as well as on the variability of the physical and mechanical characteristics of
identical rocks, are established.
This stage of the assessment allows us to develop a geomechanical model and a forecast map of the field and
move on to the third stage of the assessment, which is considered in subsequent publications of the author.