Abstract: In order to solve the problem of dust pollution and ventilation in the comprehensive excavation face of 44205 air return lane (rock lane section) at hongliulin coal mine,based on the consideration of the production process and location of the comprehensive excavation face of 44205 air return lane,the draft ventilation is proposed ,the air volume and the distance between the air inlet and the working surface are calculated and analyzed.According to the calculation results,the extraction fan of model FBCD 9.0/2×30 was selected,and a negative pressure telescopic air duct with a diameter of 800 mm was used.The application shows that:when the distance between the air inlet and the working surface is within 3 m,the maximum total dust and respirable dust at the driver's position are only 1.3 mg/m3 and 0.7 mg/m3,which significantly improves the working environment of the working face.

Key words: rock roadway,comprehensive excavation face,extraction ventilation,dust removal system