On correction of the operational parameters of a mining lift according to the survey results and mathematical modeling of the reinforcement of vertical shafts of mines

О. Gulivets; S. Popov; А. Bondarets; S. Oliinyk

On correction of the operational parameters of a mining lift according to the survey results and mathematical modeling of the reinforcement of vertical shafts of mines

О. Gulivets S. Popov А. Bondarets S. Oliinyk

Received 18.12.2020, Revised 03.03.2021, Accepted 27.04.2021

Abstract

Purpose. The purpose of the study is to establish dependencies for adjusting the operational parameters of a mine lift based on the results of a survey of the technical condition of the reinforcement of vertical shafts of mines. Research method. The research method is analytical. Scientific novelty. Dependencies have been established for adjusting the operational parameters of a mine lift based on the results of a survey of the technical condition of the reinforcement of vertical shafts of mines. Practical significance. The use of the obtained dependencies makes it possible to determine the rational values of the lifting speed of the skips and their carrying capacity based on the data of the survey of the technical state of the reinforcement of vertical shafts of mines. Results. Based on the analysis of the structures of the reinforcement of vertical shafts of mines and the working process of the «reinforcement - lifting vessel» system, it has been established that when moving along the trunk of the lifting vessels, a complex of loads arises on the reinforcement element, which arise due to deviations of the conductors from the linear shape, the presence of eccentricity of loaded skips, torsion of lifting vessels, the action of the Coriolis force. During operation, the deviation of the conductors from the design position can increase several times. In addition, as a result of the aggressive action of mine waters and the atmosphere of the shaft, the elements of its reinforcement are corroded to a certain extent. Therefore, it is necessary to adjust the operating parameters of the mine lift according to the actual value of the bearing capacity of the reinforcing elements of the vertical mine shafts Based on the analysis of the structural solutions of the barrel reinforcement and the working process of the "reinforcement - lifting vessel" system and applying the principle of compatibility of the deformations of the conductor and the shooting beam under the action of a horizontal load, the dependences of the distribution of the applied force between them were established depending on their length and the actual values of the geometric characteristics of their cross-sections and the mechanical characteristics of their materials. Based on the fulfilment of the strength conditions of the conductor and the shot beam, rational values of the lifting speed and the mass of the loaded skip are determined

Keywords:

mine; vertical shaft; shaft reinforcement; conductors; shot beams; allowable stress; strength condition

Retrieved from Vol. 19, No. 1, 2021

Pages 104–110

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Gulivets, О., Popov, S., Bondarets, А., & Oliinyk, S. (2021). On correction of the operational parameters of a mining lift according to the survey results and mathematical modeling of the reinforcement of vertical shafts of mines. Journal of Kryvyi Rih National University, 19(1), 104-110. https://doi.org/10.31721/2306-5451-2021-1-52-104-110