SUMMARY
The purpose of this study is to substantiate theoretically and technologically both parameters, formation and recovery schemes to use natural-technogenic and capacity resources of the mined coal deposits with the help of a set of geo-modules providing their activation, extraction, and storage depending on seasonable irregularity of energy consumption. Methods. Complex approach has been applied to achieve the purpose. The approach involves collection, systematization, and analysis of actual data concerning filtration as well as 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 to solve hydrogasodynamic, heat and mass transfer equations. The models reflect thermodynamic processes of a geocirculating system performance providing both heating and conditioning of industrial facilities and civic buildings since it accumulates summer heat and winter cold within the disturbed aquifers. Numerical modeling has been applied to simulate formation dynamics and a pattern of heat resource within an aquifer located over the coal seam being burnt depending on its inclination angle, coal mining stage, and aquifuge thickness. Originality. Spatial nonstationary model of heat transfer, simulating filtration direction, velocity of underground water and its temperature while carrier pumping and extracting from an aquifer for heat and cold supply of buildings according to ambient temperature has been developed and tested. Heat transfer mechanism within the flooded rock massif 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. Practical implications. Operation parameters of a geotechnological module for reuse of thermal resource of the flooded mine workings while extracting and injecting water from different levels for heat and cold supply of buildings have been substantiated. It has been proved (in terms of the “Novohrodivska 2” mine being during liquidation) that the thermal flow, which is formed while coal burning and heated water pumping, is quite sufficient to meet calorific requirements of a town with 15 thousand inhabitants.