Mining of Mineral Deposits

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Research into deformation processes in the rock mass surrounding the stoping face when mining sloping ore deposits)

Arnat Salkynov1, 2, Arailym Rymkulova2, Aigerim Suimbayeva2, Sholpan Zeitinova2

1LLP NPK “Algeorithm”, Karaganda, Kazakhstan

2Abylkas Saginov Karaganda Technical University, Karaganda, Kazakhstan


Min. miner. depos. 2023, 17(2):82-90


https://doi.org/10.33271/mining17.02.082

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      ABSTRACT

      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.

      Keywords: Zhezkazgan field, stress-strain state, stability, pillar, room


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