Experiment and Application of Underground Local Refrigeration System in High Temperature

For the engineering and geological conditions at 411 working face of Longjiapu Mine, the underground local refrigeration system for cooling and dehumidification was applied. The results showed that: after three hours usage of the underground local refrigeration system, the working face average temperature dropped of 3.3 ℃ to 5.3 ℃ and the average humidity dropped of 11% to 17%; when the airflow temperature and humidity decreased, the average temperature drop and dehumidification effect would reduce; the underground local refrigeration system can make the temperature of the working face dropped to below 26 ℃, and the dehumidification effect is obvious.