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Introduction: The research is aimed to identify the vulnerable areas of quarry slopes through the creation of a stress-strain state model for the rock mass at the Vostochny quarry, East Saryoba field of the Zhi-landy Group of cupriferous sandstones, as well as their subsequent strengthening. Methods: The research is based on the development of a database containing information on mining-geological, geophysical, geodetic and aerospace surveys. The authors of the research use modern geodetic, aerospace and geophysical technologies for scientifically based predicting of technogenic disasters and the rock mass stress-strain state modeling to ensure safe and optimal mining of fields in difficult mining-geological conditions. Results: The results obtained show that the strengthening of weakened quarry slopes based on the rock mass stress-strain state modeling contributes to the scientific-practical profitability of field mining and provides safe mining in difficult mining-geological conditions. Discussion: Novelty is in the scientific substantiation of the method for strengthening quarry slopes, which is based on the rock mass stress-strain state modeling. The research is of great practical importance, as the rock mass stressstrain state modeling increases the reliability of predicting the rock mass state during its mining. Strengthening of quarry slopes using the proposed method reduces risks and increases safety and economic efficiency of mining the solid mineral deposits in difficult mining-geological conditions. [ABSTRACT FROM AUTHOR]

Purpose. Determining the patterns for geomechanical state changes in the rock mass, depending on the stoping face technological parameters for sloping ore deposits. Methods. The state-of-the-art CAE Fidesys strength analysis system has been adopted to conduct the research on geomechanical processes around the stoping face, which is effective in a flat formulation. The system used provides a complete engineering process cycle from the preparation of the calculation model to the visualization of the calculation results. The real physical-mechanical properties of ores and host rocks of the Zhezkazgan field (Kazakhstan) are the initial data. Findings. As a research result, the patterns of change in the stress-strain state around the stoping face have been obtained, namely, the maximum tensile and compressive deformations in the room fenders and rocks of a parting, depending on its thickness (from 0 to 10 m). Based on the data obtained, it has been revealed that in the studied mining-geological conditions, elastic deformations predominate around the stoping face. Originality. As a result of conducted numerical experimental studies, a new solution is proposed for an important scientific problem related to predicting the natural and technogenic geomechanical state of the rock mass. Practical implications. The results obtained make it possible to develop technical solutions for the modernization of the room-and-pillar (panel-and-pillar) mining system under conditions of sloping fall of ore bodies in the conditions of the Zhezkazgan field. [ABSTRACT FROM AUTHOR]