Abstract: As underground mining depth increases，mine thermal damages have become increasingly prominent.These threaten the health of mine workers，but also seriously affect labor and economic efficiency of the enterprises.Through in-depth study on traditional cooling technology，based on the analysis of the advantages and disadvantages of previous artificial refrigeration measures，a new mine thermal damage control system was presented.The system consists of two parts，which respectively applies the relevant principles of heat transfer and thermodynamics.The first part is the insulation material，which covers the rock surface of cooling tunnel，and its action is to reduce the rock thermal radiation and delay air warming acting with the refrigeration system.The second part is a set of artificial refrigeration system，which makes some reasonable improvements on the traditional air-compression refrigeration cycle.The cooling of the refrigeration system focuses on the cooling tunnel.This new refrigeration system modifies the original heat transfer into mixing of two fluids，which reduces the temperature of the air flow in the cooling tunnel without influencing the underground air volume and velocity.By this method，the cooling effect can be significantly improved，but also the system component is simplified.And the technical difficulties in the construction and operation management are lowered.The system can reduce capital investment，save the cost of production，and highly increase the security of the system.

Key words: Mine thermal damage, Cooling system, Cooling tunnel, Insulation materials