№83-5

Controlling the stability of high single-tier dumps in the ukrainian reconstruction context

A. Adamchuk¹ https://orcid.org/0000-0002-8143-3697

¹Dnipro University of Technology, Dnipro, Ukraine

Coll.res.pap.nat.min.univ. 2025, 83:55–64

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ABSTRACT

Purpose. By establishing the dependences of the safe distance of the dragline excavators on the height of the single-tier dump and the level of its flooding, to substantiate an effective method of controlling the stability of high single-tier dumps in the context of the reconstruction of Ukraine.

Methodology. The computer modeling technique was used using the "Slide" software to construct the most stressed sliding surfaces of the dumped rock massif. The obtained data for calculating the width of the prism of possible displacement were analysed and their dependence on the height of the single-tier dump and the water level in the intra-mine space was established by the least squares method.

Findings. Using the "Slide" software package, the parameters of the width of the prism of possible displacement were calculated at the coefficients of the stability margin of 1.2 and 1.0 and their dependence on the height of the dump and the level of its flooding with water were established, which allowed establishing effective models of dragline excavators for different conditions of dump formation. It has been established that the height of the overburden layer when formed by a dragline excavator should not exceed 100–150 m, which can be increased only in the case of flooding the slope with water.

Originality. The new technology is based on the phenomenon that when the critical value of flooding the slope with water is reached at the level of 0.19 of the total height of the overburden layer, the stability increases and the width of the prism of possible displacement decreases, due to the strengthening of the influence of water-retaining forces in the open space of the mine.

Practical value. An effective method of managing the stability of high single-tier dumps has been substantiated, which consists in using the weight of water at the base of the dump to increase its stability. With the influx of water, the height of the dump gradually increases until the intra-mine space is filled with overburden rocks.

Keywords: internal dump, single-tier dump, physical and mechanical properties of rocks, dragline excavator, safety factor.

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date of first submission of the article to the publication – 10/07/2025
date of acceptance of the article for publication after review – 11/10/2025
date of publication – 12/29/2025