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Substantiation of rational parameters for composite support in mine workings

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Parent Category: 2025

Category: Content №3 2025

Created on 25 June 2025

Last Updated on 25 June 2025

Published on 30 November -0001

Written by V. I. Bondarenko, I. V. Sheka, A. O. Khorolskyi, I. A. Salieiev, I. A. Kovalevska, O. V. Stoliarska

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Authors:

V.I.Bondarenko, orcid.org/0000-0001-7552-0236, Dnipro University of Technology, Dnipro, Ukraine

I.V.Sheka, orcid.org/0000-0001-6818-2902, Dnipro University of Technology, Dnipro, Ukraine

A.O.Khorolskyi, orcid.org/0000-0002-4703-7228, Branch for Physics of Mining Processes of the M.S. Poliakov Institute of Geotechnical Mechanics the National Academy of Sciences of Ukraine, Dnipro, Ukraine

I.A.Salieiev, orcid.org/0009-0004-5830-352X, DTEK Energy BV, Amsterdam, the Netherlands

I.A.Kovalevska*, orcid.org/0000-0002-0841-7316, Dnipro University of Technology, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

O.V.Stoliarska, orcid.org/0000-0001-7415-9979, Dnipro University of Technology, Dnipro, Ukraine

* Corresponding author e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

повний текст / full article

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2025, (3): 058 - 064

https://doi.org/10.33271/nvngu/2025-3/058

Abstract:

Purpose. To substantiate the rational parameters of support made of composite materials for mine workings in coal mines located at depths exceeding 1,000 meters.

Methodology. The finite element method in the Ansys Mechanical environment was employed in the study. The comprehensive research approach involved collecting and analyzing input data, preparing and conducting a computational experiment, and subsequently analyzing the obtained results.

Findings. For the first time, an algorithm has been developed for determining the rational parameters of the support system, which, through computational experiments, accounts for the support cross-section, rod cross-section, the number of anchors, and their positioning – factors significantly influencing the operational characteristics of the support. The results of stress-strain state (SSS) modeling of the improved support system allowed for the substantiation of rational parameters for composite support. The research led to the development of an algorithm for selecting rational parameters for the composite support system in the conditions of PJSC Mine Administration “Pokrovske”. A methodology for determining rational composite support parameters has been developed, based on applying an algorithm for selecting the optimal support cross-section, which allows choosing a rational support cross-section, yielding rod, and support installation step.

Originality. The study identifies trends in the stress level variations within the rock mass and elements of the composite support system. The intensity of stress (σ) in the composite support system increases with a higher H/R ratio, equivalent to an increase in rock mass load. Conversely, the stress intensity (σ) decreases as the composite support cross-section increases, reducing the load on support elements.

Practical value. The proposed methodology can be used as an addition to current regulatory documents on mine working support at depths exceeding 1,000 meters.

Keywords: mine working, composite support, maximum stresses, stress-strain state

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