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AN ANALYISIS OF GEOTHERMAL SYSTEM INSTALLATION
METHODS AND CRITERIA AT CLOSED COAL MINES
O.V. Inkin1*,
D.V. Rudakov2
1Dnipro University of Technology, Institute for Physics of Mining Processes
of the National Academy of Sciences of Ukraine, Dnipro, Ukraine
2Dnipro University of Technology, Dnipro, Ukraine
*Corresponding author:
e-mail: inkin@ua.fm
Physical and
technical problems of mining production, 2021, (23), 118-135.
https://doi.org/10.37101/ftpgp23.01.009
full
text (pdf)
ABSTRACT
Purpose of this work
is to substantiate effective and hydrodynamically safe technological methods of geothermal heat recovery at closed coal mines by installation
of geothermal modules of various designs.
Methodology is based on
analytical equations to evaluate mine water drainage with maintaining the hydrodynamically safe water level within mining areas. Besides, we employ the
equations for express calculations of water and
rock heat recovery in business plans of geothermal system operation.
Results. The methods,
criteria and sequence of installation of geothermal systems at closed mines
of Donbas are analyzed according to the priority and feasibility, which will allow efficient mine water and rock heat
recovery. The thermal needs of local consumers
can be considerably covered by the geothermal
systems.
Scientific novelty. The
proposed method of calculating the basic parameters
and indicators of geothermal modules allows performing a realistic assessment of the economic efficiency under conditions of closed mines in Donbas. We demonstrated quantitatively the influence of mine water discharge, water and rock temperature
on economic indicators of geothermal systems.
Practical significance. The
substantiated methods and criteria of ecologically safe and feasible
recovery of geothermal potential of closed coal
mines can provide heat production adjusted to the local
consumer needs.
Keywords: closed mine;
water hoisting; geothermal system; mine water; thermal energy
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