Practice of underground ventilation by the multi stage fan stations and its reconstruction

This paper introduced the ventilation technology by multi stage fan stations in the underground,which was used in the No.2 mine area of Jinchuan nickel mine.The industrial test of the ventilation scheme was carried out,and the reasons that the Ⅱ stage fan station,the Ⅲ stage fan station and the Ⅳ stage fan station were destroied frequently in ventilation system of the multi stage fan stations are elaborated.It influenced seriously the safety production of the mine.On the basis of the successful ventilation technology at the first period production of the mine,the ventilation method by the two stage fan stations was raised and the ventilation technique reconstruction was carried out.It is proved by practice that this method meets the ventilation requirement at the work face,and good economic benefit is obtained.