Abstract
Purpose. To ensure the stability of quarry slopes during the combined development of mineral deposits by determining optimal slope parameters, ensuring their long-term stability while minimizing the volume of overburden operations, and reinforcing areas in case of detected fractures, both visible and hidden. Methodology. The study employs a comprehensive approach that includes field geomechanical observations, mathematical modeling, and analytical calculations. Modern geodetic methods, such as laser scanning and Global Positioning System (GPS) navigation, were applied to identify instability zones and assess the impact of geotechnical factors. The Examine2D software was used to model stress and deformation distribution within the rock mass. Findings. A zoning scheme of the stress-strain state of the rock mass was developed, taking into account the influence of tectonic faults and the load from waste dumps. Zones with low stability factor values (0.2–1.4), requiring additional reinforcement, were identified. Modeling showed that stress concentrations under the quarry bottom and near faults result in horizontal and vertical displacements of rock masses, affecting the stability of slopes and mining workings. Originality. For the first time, a comprehensive study of the stress-strain state of the rock mass under combined mining conditions in Kazakhstan was conducted using modern geodetic and geomechanical technologies. Key factors affecting slope stability and their long-term stability were identified. Practical value. The obtained results allow for the optimization of quarry slope parameters, a reduction in overburden operations, the prevention of emergency situations, the safe operation of underground workings, and improved mining efficiency. Recommendations for reinforcing unstable zones are provided.