Abstract
To study the nature of the forces determining the stress state of the massif, the results of experimental studies of determining numerical values and spatial orientation of the main components of the active stress field using the local hydraulic fracturing method in coal mines of Central Region of Donbas are compared with maps characterizing the intensity of the distribution of paleo-and modern tectonic processes in the area of Donbas. Statistical relationships between indicators characterizing the stress state and the physicomechanical properties of rock are established. The results of performed studies show that the stress fields measured under the conditions of the mines of the Central Region of Donbas are mainly due to modern movements, but the paleological disturbances of tectonic blocks with disjunctive dislocations have a significant effect on the change in the stress state of the massif.
Highlights
The geomechanical state of rocks is influenced mainly by the stress-strain state, reservoirand-mechanical properties of the medium
One of the main factors responsible for the mechanical state of rocks is the initial stresses of these rocks, which are characterized by numerical values and spatial orientation of the main components of the active stress field
This paper examines the nature of the forces that determine the stress field, the correspondence of their proposed model and the effect of tectonics on the magnitude of the main components of the modern stress field
Summary
The geomechanical state of rocks is influenced mainly by the stress-strain state, reservoirand-mechanical properties of the medium. As a result of the research performed, initial and theoretical data as to the natural stress state of the upper layers of the earth's crust were obtained, the main forms of rock pressure manifestation in underground mining were classified, the reservoir-and-mechanical properties of the rock were studied. Ideas about the numerical values and the nature of distribution of the main stresses in the rock mass, the gas pressure and its interaction with the fractured-pore structure of the reservoirs, the effect of gas saturation on the mechanical properties of rocks under the differentcomponent stress state have ambiguous character. Ambiguity of interpretation of experimental data, difference in conceptual ideas about the real mechanical state of the rock mass indicate the complexity and lack of knowledge of the factors forming it, one of which is the intensity of paleodisturbance and modern movements. The purpose of the work is to study the influence of paleo- and modern tectonic processes on the stress state of a rock mass
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