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Predicting the geofiltration processes within the closed quarry zone in difficult technogenically disturbed conditions

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Category: Content №1 2025

Last Updated on 25 February 2025

Published on 30 November -0001

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Authors:

Ye.A.Sherstiuk, orcid.org/0000-0002-1844-1985, Dnipro University of Technology, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

M.V.Petlovanyi, orcid.org/0000-0002-8911-4973, Dnipro University of Technology, Dnipro, Ukraine, e-mail:  This email address is being protected from spambots. You need JavaScript enabled to view it.

K.S.Sai, orcid.org/0000-0003-1488-3230, Dnipro University of Technology, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

* 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, (1): 013 - 021

https://doi.org/10.33271/nvngu/2025-1/013

Abstract:

Purpose. The research purpose is a predictive assessment of the water content of the mined-out quarry cavity under conditions of simultaneous technogenic impact of active quarries and mines based on numerical modeling of geofiltration processes to determine the probability of contact and water saturation of the formed backfill mass over time.

Methodology. A numerical geofiltration model implemented in the MODFLOW software package is used to study the hydrodynamic regime of a specified site in the Kryvyi Rih region, where a closed quarry is located, planned for backfilling. The solution of inverse and prognostic problems is applied, in the course of which the adequacy of reflecting the hydrodynamic conditions of the studied area in the geofiltration model has been determined, as well as the predicted rates and nature of the level restoration at the mining site have been obtained.

Findings. A complex model of geofiltration processes has been developed and tested, taking into account the technogenic impact of operating quarry and mines, which makes it possible to assess the nature of groundwater level restoration in dynamics. It has been found that in the current situation of the hydrodynamic groundwater regime at the site, the greatest impact is caused by drainage dewatering of mines, which has led to the formation of depression cones and groundwater discharge in a large active quarry and a closed quarry planned for backfilling. It has been determined that if the drainage dewatering of all mining enterprises is completely stopped, which is unlikely, the groundwater level restoration in a closed quarry can occur no earlier than in 50 years, while the dependence of the groundwater level restoration over time is logarithmic.

Originality. Based on the modeling of geofiltration processes, an assessment of the groundwater level restoration in a closed quarry is provided during the development of various scenarios for the cessation of dewatering at mining enterprises that have a significant technogenic impact on the hydrodynamic regime. It has been proven that when backfilling the mined-out space of a closed quarry, a monolithic backfill mass will not be prone to a decrease in physical-mechanical characteristics from the influence of aquifers, which will ensure its long-term geomechanical reliability.

Practical value. A methodology has been developed for modeling geofiltration processes and restoring the groundwater level of a closed quarry, taking into account the difficult complex technogenic impact of various mining enterprises. The results obtained are important for the predictive assessment of the probability of water saturation of the backfill mass in the quarry cavity and planning of engineering-geological measures for its isolation.

Keywords: quarry, geofiltration processes, groundwater, level restoration, depression cone, dewatering, backfill mass

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