Design and Application of Cooling System for Mining Area Permanent Refuge Chambers in Lijiahao Coal Mine
The permanent refuge chamber in the mining area is equipped with a complete set functions of multi-level protection for each system.The chamber is equipped with various life support systems such as oxygen supply system,compressed air system,air cleaning and purification system,temperature and humidity control system,monitoring system,power system,communication system and others,as well as auxiliary facilities such as stretchers,lighting equipment,emergency rescue lights,first aid kits,food,drinking water,toolbox,signs and so on.According to regulations,there must be at least 96 hours of protection time inside the refuge chamber without the condition of external assistance.Based on this,aiming at the existing thermal hazard problem in the permanent refuge chamber of the 5-1 south main and auxiliary main roadway 6 connecting roadway in Lijiahao Coal Mine,three refrigeration methods are proposed.Based on the characteristics of refrigeration technology in confined spaces,by comparing three refrigeration methods,phase change materials are used as refrigeration equipment to conduct research on phase change refrigeration technology.A simple,reliable,economical,and maintenance free passive refrigeration technology is introduced.
phase change materialmining area refuge chambercooling system