Inkin O.V., Kobets A.S., Puhach A.M., Dereviahina N.I. Substantiation of geotechnological parameters and schemes of use of natural-technogenic deposits of Donbass

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Parent Category: Geo-Technical Mechanics, 2020
Category: Geo-Technical Mechanics, 2020, № 151

Geoteh. meh. 2020, 151, 203-215

DOI: https://doi.org/10.15407/geotm2020.151.203

Substantiation of geotechnological parameters and schemes of use of natural-technogenic deposits of Donbass

1Inkin O.V., 2Kobets A.S., 2Puhach A.M., 1Dereviahina N.I.

1National Technical University “Dnipro Polytechnic”, 2Dnipro State Agrarian and Economic University

UDC 622.272

Language: Russian

Abstract.

Objective of this work was to substantiate theoretically and technologically both parameters and schemes of formation and use of natural-technogenic and capacity resources of the mined-out coal deposits with the help of a set of geomoduli for providing these resources activation, extraction, and storage depending upon seasonable irregularity of energy consumption. Complex approach was applied to reach this objective. The approach involves collection, systematization, and analysis of actual data concerning filtration and physical and mechanical characteristics of enclosing rocks, and seam mining conditions effecting formation of natural and technogenic deposits in addition to analytical and numerical methods in order to solve equations of hydraulic gas dynamics and heat and mass transfer.

The models reflect thermodynamic processes of geocirculating system performance providing both heating and conditioning of industrial facilities and civic buildings since it accumulates summer warmth and winter coldness within the disturbed water-bearing rocks. Numerical modeling was applied to simulate formation dynamics and a pattern of heat resource within water-bearing level occurring over the coal seam being burnt depending upon its inclination angle, coal mining stage, and aquifuge thickness. Spatial nonstationary model of heat transfer, simulating filtration direction, velocity of underground water and its temperature while carrier pumping and extracting from a water-bearing level for heat and cool supply of buildings according to ambient temperature was developed and tested. Heat-transfer mechanism within the flooded rock mass in an abandoned mine, followed by periodical injection and extraction of mine water from different levels, and its heating with the help of natural geothermal heat as well as underground burning of residual coal reserves has been analyzed.

Operation parameters of geotechnological modulus for reuse of thermal resource of the flooded mine workings while extracting and injecting water from different levels for heat and cool supply of buildings were substantiated. It was proved (in terms of Novogrodovskaia 2 mine being under liquidation) that the thermal flow, being formed while coal burning and heated water pumping, was quite sufficient for satisfying calorific requirements of a town with population of 15 thousand people.

Keywords:

coal deposits, hydrothermal resources, thermal energy, geocirculating systems

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About the authors:

Inkin Oleksandr Viktorovych, Doctor of Technical Sciences, Professor at Department of Hydrogeology and Engineering Geology, National Technical University “Dnipro Polytechnic”, Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Kobets Anatolii Stepanovych,Doctor of Public Administration, Professor, Rector, Dnipro State Agrarian and Economic University, Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Puhach Andrii Mykolaiovych, Doctor of Science in Public Administration, Professor of the Department of Management, Public Administration and Administration, Dnipro State Agrarian and Economic University, Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Dereviahina Nataliia Ivanіvna, Candidate of Technical Sciences, Associate Professor at Department of Hydrogeology and Engineering Geology, National Technical University “Dnipro Polytechnic”, Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.