UDC 556.3:504.61:622.016
Z. Khevpa, V. Dyakiv
Z. Khevpa, Ph.D. in Geology Sciences, Senior research fellow, State Institution “Institute of Environmental Geochemistry of the National Academy of Sciences of Ukraine, ORCID: 0000-0002-6759-9850, e-mail:zenonzxv@gmail.com
V.O. Dyakiv, Candidate of Geological Sciences, Associate Professor of the Ivan Franko National University of Lviv, e-mail: dyakivw@yahoo.com, https://orcid.org/0000-0001-8045-4595
DOI:
Pages:
FEATURES OF THE DEVELOPMENT OF KARST PROCESSES AFTER THE FORMATION OF THE POST-MINING LANDSCAPE WITHIN THE BOUNDARIES OF THE STEBNYTSKY DEPOSIT
Abstract. The Stebnitsy deposit of polymineral potassium ores of the sulfate type is the largest in terms of estimated reserves within the Precarpathian depression. Here, for many centuries, in the surrounding territories, brines were mined, from which salt was evaporated, and in the last 70-100 years it has been developed as a powerful source of mining and chemical raw materials for the production of agrochemical products, where potassium-magnesium ores were mined and enriched, potassium-magnesium fertilizers were produced and significant volumes were supplied to various regions of Ukraine. However, such mining did not pass without a trace for the geological environment and the environment: the primary karst voids from the extraction of brine, over time, merged into a single network of karst channels, which during the period of water inflows into the mining works (unloading zones), became feeding and transit zones of the karst hydrogeological system, and in the last few decades, salt karst has been actively developing here due to the appearance of water inflows and flooding of mine No. 2. An analysis of the factors of salt karst activation and the formation of the hydrogeological system in the zone of influence of the largest karst depressions within the Stebnytskyi potassium salt deposit was performed. To achieve the set goal, the tasks of analyzing the dynamics of water inflows over time, landscape changes, karst deformations and depression formation, substantiation of models and selection of stages of geodynamic processes by a set of features were solved. Methods of cartographic research were used, which consisted in the analysis of cartographic materials – maps, schemes, plans of mining operations, field research, which consisted in field research, measurements and photo documentation of the consequences of carotinization and remote sensing using the multifunctional software package Google Earth Pro. According to the results of the research, three models of the formation of a technogenically disturbed geological environment were substantiated and seven stages were identified in the model of disturbance of the geological environment and radical changes in hydrogeological conditions during the activation of water inflows into mining operations, the development of salt karst, undercutting of pillars, the formation of large depressions and karst lakes in them.
Keywords: Mine, potash salt, karst, mining, conservation, brines.
References
- Dyakiv V.O., Khevpa Z.Z., Petryshyn V.Yu. (2023), Evolution of the development of technogenically activated salt karst within the Stebnytsky potash deposit. Eighth international scientific and practical conference “Subsoil use in Ukraine. Investment prospects”. Conference materials. Lviv. P. 438-45.
- Dyakiv V.O. (2007), Experimental modeling of disintegration of halopelite mineral associations during flooding of mine No. 2 of Stebnytsky DHKP “Polymineral”. Bulletin of Volyn. un-tu. Vol. 2. part.2. – P. 285-291.
- Dyakiv V. O. Khevpa Z.Z., Ogirchak O.P. (2004), Evolution of post-mining changes in hydrogeological conditions in the zone of influence of the largest karst depressions within the Stebnytskyi deposit of potash salts. Visnyk of Lviv University. Geological Series. 2024. Issue 38. P.94 –115.
- Khevpa Z.Z. (2024), Ecological and geodynamic characteristics of the formation of potash salt deposits (on the example of the Stebnytskyi deposit of the Ukrainian Carpathians). Mineral Resources of Ukraine. No. 3, Kyiv. 2024. P. 73-77.