Practice of Blade Angle Adjustment of Infrastructure Mine Main Fan

The problem always happen,which is coal mine ventilation ability surplus and power resources waste during the early production and construction.According to the production practice of Xinglong coal mine,the paper testifies that the measures which are adjusting the ventilation fan blade angle turnover,not only can fulfil ventilation need during the early production and construction,but also can reduce power consumption and improve the economic benefits of mine.