Аннотация
Purpose. To comprehensively assess the stability of the walls and ledges at the Vasilkovsky quarry, located on a gold-bearing deposit in the Republic of Kazakhstan, taking into account the geomechanical characteristics of the rock mass structure, the presence of multidirectional fractures, and tectonic disturbances. Methodology. To achieve the set goals, a comprehensive approach was used, including mining-geological and geomechanical analysis of the structure and massif of rocks, as well as the study of their fracturing and tectonic faults. Findings. The study resulted in a comprehensive assessment of the stability of the northern slope at the Vasilkovsky quarry on a gold-bearing deposit in the Republic of Kazakhstan using numerical modeling in Rocscience and DIPS software packages. It was found that the presence of tectonic disturbances and fracturing has a significant impact on the stability of the slopes. The relationships between the slope height and the width of the collapse prism were determined. A fracture propagation model was developed. Originality. The scientific novelty lies in the development of a comprehensive geomechanical approach to assessing the stability of the sides and ledges at the Vasilkovsky quarry based on the integration of numerical modeling of the stress-strain state and spatial analysis of the rock mass fracturing. Critical directions of the sidewall with reduced stability have been established, and dependencies between the geometry of the slopes and the parameters of the collapse prism have been determined. The influence of microstructural disturbances on the strength characteristics of rocks has been substantiated. Practical value. The developed geomechanical model, which takes into account the fracturing of the massif and tectonic disturbances, provides the ability to accurately predict unstable zones. Numerical modeling of the stress-strain state of rocks allows for the justification of quarry planning and design parameters.