Assessment of the mine shaft guides stress-strain state under the elevator force impact caused by the dynamics of airflow motion

This study addresses the problem of contact interaction between the rollers of a mine hoist cage (elevator) and the guide conductors during the operation of a hoist system in a ventilation shaft, taking into account the dynamics of airflow. The influence of various operating modes of the ventilation system, as well as the movement of the cage and counterweight, on the parameters of the contact interaction arising between the cage rollers and guide conductors has been investigated. A numerical model of the contact interaction between the cage rollers and mine guide conductors has been developed based on the finite element method. The constructed finite element model allows for the assessment of the stress-strain state of the structural elements of the guiding devices under various configurations of force exerted by the cage, as well as for determining the magnitudes of critical loads that can cause residual deformations in the guide conductors. Analysis of the research results has shown that aerodynamic forces arising during the operation of mine hoist complexes significantly influence the stress-strain state of this geotechnical system, highlighting the necessity of accounting for them in the design of mine hoist components. The obtained results can be used to ensure the safe and failure-free operation of mine hoist complexes by optimizing their designs during the planning stage to minimize stresses in the contact node between the cage rollers and mine guide conductors, as well as to develop recommendations for replacing guide devices under conditions of multi-cycle loading from the cage rollers.