Voronov P. Substantiation of parameters and creation of the heat protection complex of the mine-rescuers with use of compressed air

The thesis is devoted to the problems of heightening efficiency and safety of carrying out the emergency-and-rescue operations by the mine rescuers wearing the heat protective clothing (jackets, suits) with the water ice cooling system by elimination of consequences of complicated accidents. Unsufficient efficiency of use of the "Зима-А" mobile complex of the heat protective means in view of its high cost, inopportune delivery, difficulty of long-term storage of liquid nitrogen freezing the water cooling elements (ОЭ-2) concerning the heat protective clothing only on the surface of the mine is the objective reason of development of an alternative method and technical means to freeze, store and delivery the ОЭ-2 elements to the place of carrying out the operations by the mine rescuers wearing the heat protective clothing. Time of freezing the necessary number of the ОЭ-2 elements (the average time is 160 ОЭ-2 elements/h, the maximum time is 190 ОЭ-2 elements/h), advisability of use of compressed air from the mine compressor station, pneumatic network or mobile compressors as cold carrier have been substantiated. Technological schemes of the surface, mine riding a rail track and mobile installations that are operating in open cycle have been developed, where the devices with isoentropic air expansion, i.e. turbo-coolers, and those with the vortex effect, i.e. Rank-Hilsh pipes (mobile installation), are used for cold production. The mathematical model of the heat exchange and hydraulic processes occurring in the system "Cold carrier source - means of urgent cold production - water cooling elements" has been developed. By means of the mathematical model the constructive parameters of the components of the system, i.e. air-freezing installations and their capacity have been determined. The air-freezing installations are used as components of the "Зима-В" mobile complex of the heat protective means by elimination of the consequences of accidents in the mines guaranteeing efficient and safe carrying out the operations by the mine rescuers under extremal microclimatic conditions. Key words: mine rescuer, temperature, compressed air, turbo-expander, vortex tube, cooling elements, freezing installation.