Optimization for ventilation system of Mengjin Coal Mine

In view of the Mengjin Coal Mine's large total ventilation resistance,east wing main return way wind speed out of gauge,coal mining deployment is not reasonable,and the wind-waste problem is getting serious.The optimization scheme is made up,which is analyzed by measuring the resistance of the ventilation and the main fan performance appraisal results.The main measures include:reducing the tunnel resistance、reasonable distribution of air quantity、determine the later ventilation system,through the solution of network by using VNT,verified the effect of the optimization schemes.And according to the mine's later production deployment,developed a ventilation system of the second level.By evaluating contrast,chose the reasonable solution.The results showed that expand the section of the air return roadway can effectively reduce the resistance of mine ventilation system,greatly reduce the energy consumption of the fan,and the ventilation system will be stable and reliable,provide guarantee for production safety of the mine.