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Analysis of risks and
opportunities of safe use of the geothermal resource of flooded mines
D.V. Rudakov1, Yajun Sun2, O.V.
Inkin3*,
1Dnipro University of Technology, Dnipro,
Ukraine
2China University of Mining and Technology,
Xuzhou, China
3Department of Physics of Mining Processes of
the Institute of Geotechnical Mechanics named after M.S. Polyakov of the National Academy of Sciences of
Ukraine, Dnipro, Ukraine
*Corresponding author: e-mail: inkin@ua.fm
Physical and technical
problems of mining production, 2023, (25), 92-107.
https://doi.org/10.37101/ftpgv25.01.008
full text (pdf)
ABSTRACT
The purpose of this study is
to make a comprehensive analysis of potential risks associated with the
operation of geothermal systems of various types in flooded mines induced
by mining-technical, hydrogeological, hydrochemical,
and technical and economic factors.
Methodology includes the
collection and analysis of data on geothermal, geochemical, flow and other
properties of rocks and mine water, as well as mining-technical conditions
for extracting minerals, which affect the operation of geothermal systems
in flooded mines.
Results. We assessed the influence
of the risks of different origins on the sustainability of geothermal
system performance based on the real experiences of their operation in
closed mines in different countries around the world. Risks associated with
planning, placement, operation, and economic factors are
systematized on the examples of the operation of dozens of
geothermal systems in different countries of the world. A typical example
shows how energy efficiency depends on the depth and COP based on a
criterion defined as the ratio of thermal energy recovered to the thermal
equivalent of electrical energy spent on the operation. Closed-loop systems
can be relatively more energy efficient compared to open-loop systems, but
due to lower thermal capacity, they may not be economically feasible.
Scientific novelty. Through an
integrated approach, we estimated the positive and negative impacts of
natural and man-made factors on the long-term
operation efficiency of geothermal systems, depending on the method of mine
water heat recovery, as well as the causes and mechanisms of potential
risks that can threaten the sustainable operation of the systems.
Practical
significance. The analysis made is necessary for comprehensive consideration and
timely prevention of risks to be mandatorily included in feasibility
studies of geothermal systems in flooded mines to ensure stable, long-term,
and environmentally safe operation.
Keywords: Flooded mine, mine waters, geothermal systems,
operation, risks
REFERENCES
1. Salekhiradzh S.Sh. (2014). Obgruntuvannia parametriv vykorystannia systemy vidboru heotermalnoi ener-hii v umovakh hlybokykh vuhilnykh shakht: Abstract of the dissertation of a candidate
of technical sciences: 05.15.09. Donetsk, 25 s.
2. Dolinskyi A.A., Khalatov A.A.
(2016). Heotermalna enerhetyka:
vyrobnytstvo elektrychnoi
i teplovoi enerhii. Visnyk NAN Ukrainy. № 11. S. 76-86.
3. The Future of Geothermal Energy in the
21 Century Impact of Enhanced Geothermal Systems (EGS) on the United States.
Report : Massachusetts Institute of Technology,
2006. 372 p.
4. Rudakov, D., Inkin, O.
(2022). A method to evaluate the performance of an open loop geothermal
system for mine water heat recovery. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, (1), 5-11. https://doi.org/10.33271/nvngu/2022-1/005
5. Rudakov D.V., Sadovenko I.O.
(2006). Prognozuvannja gidrodynamichnogo
rezhymu pry vidprac'ovu-vanni
j zatoplenni shahtnogo polja. Visnyk ZhDTU, (1), 151-157.
6. Banks D., Athresh A., Al–Habaibeh A.,
Burnside N. (2019). Water from abandoned mines as a heat source: practical
experiences of open– and closed–loop strategies, United Kingdom. Sustainable Water Resources Management.
No 5. P. 29-50. https://doi.org/10.1007/s40899-017-0094-7
7. Ramos E., Breede K., Falcone G. (2015). Geothermal heat recovery
from abandoned mines: a systematic review of projects implemented worldwide
and a methodology for screening new projects. Environmental Earth Sciences.
Vol. 73, P. 6783-6795.
https://doi.org/10.1007/s12665-015-4285-y
8. Walls D.B.,
Banks D., Boyce A.J., Burnside N.M. (2021). A review of the performance of minewater heating and cooling systems. Energies, 14, 6215. https://doi.org/10.3390/en14196215
9. Oliinichenko V.H. (2016). Analiz
tekhnichnykh vymoh do teplotras heotermalnoho teplopostachannia. Vidnovliuvana enerhetyka.
№ 2. S. 65–72.
10. Michel
A.F. (2009). Utilization of Abandoned Mine Workings for Thermal Energy
Storage in Canada. In Proceedings of
the Effstock conference, Stockholm, Sweden.
11. Brabham P., Manju M., Thomas H., Farr G., Francis R., Sahid R., Sadasivam S.
(2020). The potential use of mine water for a district
heating scheme at Caerau, Upper Llynfi valley, South Wales, UK. Q. J. Eng. Geol. Hydrogeol., 53, 145.
https://doi.org/10.1144/qjegh2018-213
12. Banks D.
(2021). Fessing up: Risks and obstacles to mine water geothermal energy. In
Proceedings of the Mine Water Heating and Cooling; A 21st Century Resource
for Decarbonisation. Available online: https://www.researchgate.net/publication/
351450683_’Fessing_up_Risks_and_obstacles_to_mine_water_geothermal_energy
(accessed on 20 September 2023).
13. Dolyna L.F. (2000). Stichni vody pidpryiemstv
hirnychoi promyslovosti
ta metody yikh ochyshchennia. D.: Molodizhna
ekolohichna liha Prydniprovia, 61 s.
14. Adams C.,
Monaghan A., Gluyas J. (2019). Mining for heat. Geoscientist. № 29, Р. 10-15.
15. Steven J.
(2021). From Venture Pit to Walker Shore, coal and heat and fathoms of
core: Mine water Heat Exploitation in Newcastle/Gateshead.
In Proceedings of the 2021 Mine Water Geothermal Energy Symposium, “Mine
Water Heating and Cooling – A 21st Century Resource for Decarbonisation”,
Webinar.
16. Rudakov D., Sun
Y., Inkin O. (2023). Optimization of mine
water discharge with the river hydrograph. Case study Samara River in
Western Donbas. V International Conference «Essays
of Mining Science and Practice».
17. Rudakov D., Inkin O. (2022).
Validation of the operation efficiency criteria for geothermal probes in
flooded mine workings. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu,
№ 5, p. 100-105. https://doi.org/10.33271/nvngu/20215/100
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