Comparison analysis on centralized cooling and sectional cooling methods of high temperature coal mining face

in order to study the coling method of the air cooler in the coal mining face affected to the temperature of the coal mining face,based on the energy conservation law and heat tansmission principle,the fite element analysis software and the site experiment method were appied to the study on the centralized coling and the sectional cooling methods of the coal mining face. The two cooling mnethods found both could have the temperaturecooling function to the coal mining face. In the practices,the average temperature of the coal mining face with the sectional cooling method was 27.5 ℃Cand was 0.3 C lower than the average temperature of the coal mining face with the centralized cooling method.With the variance of the calculation thevariance of the coal mining face with the sectional cooling method was0.078 only and the temperature variance of the coal mining face with the centralized cooling method was 0.585.The results showed that the sectional cooling method could provide much lowe mining face and ensure a better working temperature environment to the coal mining face.