Analysis on Circulating Wind in Mine Local Ventilation System

摘要

The circulating wind of local fan was one of the most dangerous sources in coal mines, and it had a significant impact safety production in coal mine. This paper briefly outlined the relation between local ventilation and the system of the mine ventilation. Two local ventilation methods were analyzed, one is the air duct export of local fan facing directly the working face and the other is the air duct export of local fan which was installed in the crossheading beside the drifting face.Detailed introduction was made of the energy relationship of each node in drifting ventilation in the two cases. Corresponding energy slope curves were drawn, from which node energy and its changing relationship of each energy node in drifting ventilation were easily seen. The analysis of formation conditions of circulating air from the perspective of energy is significant for the prevention of underground circulating air.