Sadovenko I.A., Inkin A.V., Dereviahina N.I., Hriplivec Ju.V. Technical-economical and ecological estimation of effectiveness of usage of water of “Stashkov” mine for heat supply of buildings

Details
Parent Category: Geo-Technical Mechanics, 2019
Category: Geo-Technical Mechanics, 2019, № 144

Geoteh. meh. 2019, 144, 229-240

https://doi.org/10.15407/geotm2019.144.229

Technical-economical and ecological estimation of effectiveness of usage of water of “Stashkov” mine for heat supply of buildings

1Sadovenko I.A., 1Inkin A.V., 1Dereviahina N.I., 1Hryplyvec Ju.V.

National Technical University “Dnipro Polytechnic”

UDC 622.51:622.817.4

Language: Russian

Abstract.

The aim of the paper is justification of the economically efficient technological scheme for development of a thermal resource of “Stashkov” mine after its closure, ensuring the maintenance of a favorable energy and ecological-hydrogeological regime in the region. In order to achieve this aim, a complex approach was applied, including collecting, systematizing and analyzing actual data on filtration and physical-mechanical properties of host rocks and mining and technical conditions of development of seams that affect the formation of natural and technogenic deposits, as well as analytical and numerical methods of solving the equations of the geomodule operational efficiency under different conditions. A geotechnological scheme of environmentally safe usage of mine water was justified, involving water pumpingup to the surface, heat removal and water reverse pumping into the seams. The suggested circulation system is characterized by an increased energy balance, since it is used to extract almost all the groundwater heat, as well as part of the heat of host rocks. In order to estimate the effectiveness of usage of this technology, calculations of usage of mine water as a source of low-potential energy in heat pumps in comparison with other alternatives (groundwater and surface water streams)using Mathcad software were performed, and it was established that this gives great conversion coefficients of mine water(5.2‑5.8 when Т2 = 50 °С and 3.2‑3.9 when Т2 = 70 °С). A geotechnological scheme of usage of mine water was developed, which considers heat transfer, filtration direction, velocity and temperature of groundwater during pumping and removal of heat-transfer fluid from an aquifer for heating and cooling of buildings. The mechanism of heat removal in a flooded rock massif of amine during liquidation was studied with justification of environmentally safe usage of mine water. Conducted research allowed justifying operational parameters of an economically feasible geotechnological scheme, which allows stabilizing energy consumption and environmental situation in coal mining regions by combining technologies for heat generation, mine drainage, water regime regulation and mine water treatment in a single module.

Keywords:

thermal aquifer, geo-circulation system, thermal energy, net present value

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About the authors:

SadovenkoIvan Oleksandrovych, Doctor of Technical Sciences, Professor, Professor of Department of Hydrogeology and Engineering Geology, National Technical University “Dnipro Polytechnic”, Dnipro, Ukraine

InkinOleksandrViktorovych, Doctor of Technical Sciences, Professor of 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.

DerevyahinaNataliiaIvanivna, Candidate of Technical Sciences, Associate Professor of 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.

HryplyvecYuliaVolodymyrivna, Researcher of Department of Hydrogeology and Engineering Geology, National Technical University “Dnipro Polytechnic”, Dnipro, Ukraine