Dotsenko O. Improving the environmental safety of mine water discharge in the coal-mining regions of Polesye

The Thesis for the PhD degree (candidate of engineering sciences in the specialty of 21.06. 01 – Environmental Safety. – Scientific Research Institution «Ukrainian Scientific Research Institute of Ecological Problems». Kharkiv, 2021.23 The dissertation is devoted to solving the scientific and practical problem of improving environmental safety by reducing the influence of mine water on natural water bodies in the coal mining regions of Polesie (on the example of the Lviv-Volyn coal basin). Based on mathematical calculations and the results of field studies, a technology for preparing mine water and a system for their controlled diversion to surface water bodies have been developed and theoretically justified. Recommended for implementing ways to ensure the optimal functioning of natural ecosystems. For the first time developed and theoretically substantiated scientific and technical solutions for the use of drainage and rainwater for the desalination system of mineralized mine waters. The proposed method for the preparation and purification of mine water, the methods of environmental assessment of regulated discharge, and a scheme of optimal conditions for discharge into the river was developed. Rata, taking into account the peculiarities of natural conditions, which allows, compared with existing methods, to reduce by 3-5 times the amount of pollutants (normalized) substances entering the hydrographic network and thereby guarantee the ecological state of the aquatic environment in the coal-mining regions of Polesye. The developed scientifically grounded approaches to the preparation of mine waters for discharge into surface water bodies have been implemented at the Lyubelskaya mine number 1-2 in the Lvov-Volyn coal basin. Methods are proposed to reduce the negative impact of mine waters on surface waters and groundwaters by developing and substantiating optimal conditions for their transportation and disposal using the Butynsky canal of the reclamation system, which will prevent pollution and preserve ecologically acceptable hydrochemical and hydrological regimes of the Rata River, a tributary of the transboundary river Western Bug. The proposed approach to the development of a purification system and determination of the optimal conditions for controlled discharge of mine water is recommended for implementation in the development of projects for the construction of mines in similar natural landscape conditions (within Polesie). Keywords: coal mining regions, mine waters, hydrographic network, mine water drainage system, increasing mineralization, environmental safety, water environment monitoring, mine water treatment technology, introduction.