Study on status and solution to improve the ventilation system of Quang Hanh coal mine

Abstract

Quang Hanh coal mine is currently operating at two areas with 11 longwalls having the annual production of 1.5 million tonnes. In recent years, the mine has used 4 conjugate fan stations for air ventilation. To assess the quality of ventilation operation at the Quang Hanh coal mine, the paper surveyed the ventilation quality at longwall faces, roadway faces, ventilation works and main fans. The results show that the ventilation at longwall and roadway faces basically satisfies the requirements. However, in some areas, the fresh air has not been sufficiently supplied, the temparature and humidity are high, the air leakage is serious, and the total intake air lacks an amount of 26.4 m3/s (8%). Based on these the findings, the paper the proposes proper solutions to the air ventilation system at the Quang Hanh coal mine in the near future.