Authors: P.V. Grechishkin, K.V. Sokolov, N.Y. Troshkov

Title of the article: The causes of the formation and development of structural defects in areas of high rock pressure and their effect on the ejection hazard of the formation

Year: 2024, Issue: 5, Pages: 108-114

Branch of knowledge: 2.8.8 Geotechnology, mining machines

Index UDK: 622.831:013

DOI: 10.26730/1999-4125-2024-5-108-114

Abstract: The processes of formation of zones of increased mountain pressure are considered. Numerical modeling of the conditions under which the spread of zones of increased mountain pressure can achieve the greatest development is performed. The mechanism and parameters of the action of zones of increased mountain pressure are given. It is proposed to consider the development of geomechanical processes in areas of high rock pressure from a single position of the mechanism of cracking and destruction of coal and side rocks, which allowed us to develop a universal approach to defining and delimiting zones of increased blockage and emission hazards within zones of high rock pressure. The substantiation of the change in the coupling coefficient K depending on the deformation properties of rocks (Poisson's ratio and lateral expansion) is given. The relationship between maximum normal and tangential stresses and deformation properties of coal seams and lateral rocks is described, which explains the empirically established difference in the parameters of zones of increased rock pressure for the selection of measures ensuring the safety of mining operations by the factor of emissions and roof collapses. The influence of the deformation properties of rocks on the nature of the manifestation of rock pressure in areas of increased rock pressure is shown. An explanation of the development of structural defects in areas of high rock pressure is given, taking into account the consideration of physical processes occurring in coals and rocks. The experimental results showed that with a time-varying level of applied stresses, the durability of rock samples depends on the amount of accumulated cracks and the process of their accumulation is irreversible. The results of the analysis of the ratios of maximum normal and tangential stresses in areas of increased rock pressure are presented and the dependence of the development of structural defects in coal seams and lateral rocks on the Poisson's ratio and the duration of increased loads is shown.

Key words: high mountain pressure zone mountain range formation stress deformation Poisson's ratio

Receiving date: 22.04.2024

Approval date: 29.09.2024

Publication date: 24.10.2024

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