гірський масив rock mass 2 thermal potential 2 vertical well 2 вертикальна свердловина 2 тепловий потенціал 2 finite difference solution 1 geothermal coolant 1 geothermal deposits 1 geothermal resources 1 geothermal well 1 heat exchange 1 heat inflow from mountain massif 1 heat pump 1 mathematical model 1 method of extraction 1 mountain massif 1 mountain range 1 non-stationary heat transfer 1 permeable layer 1 scientific-geological element 1 soil massif 1 soil thermophysical properties 1 temperature difference 1 the inverse problem of thermal conductivity 1 thermal conductivity coefficient 1 thermal diffusivity coefficient 1 upper layers of the earth 1 well 1 вертикальная скважина 1