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采用国产88-1型双级对旋式轴流风机配1.2m直径柔性风管,单机压入式送风1500m进厅试验,结果风管出口风量达864m~3/min,工作面风速达0.47m/s,管网平均百米漏风率<1％,工人呼吸带粉尘浓度3.4mg/m_(m)~3,CO浓度从未改造前555mg/m_(m)~3降低至40mg/m_(m)~3,粉尘和有害气体浓度均接近国家卫生标准和国际标隧道作业通风标准所规定的容许浓度。
Adopting domestically produced double-stage axial fan with 88-1 type and 1.2m diameter flexible duct, single-unit press-in air supply 1500m into hall test, the air duct outlet air volume reached 864m ~ 3 / min and working face wind speed reached 0.47 m / s, the average air leakage rate of the pipe network is less than 1%, the concentration of dust in the respiratory zone of the workers is 3.4mg / m ~ 3, the concentration of CO is reduced to 55mg / m ~ 3 from 40mg / m_ m) ~ 3, the concentration of dust and harmful gas are close to the national health standards and international standards of tunnel ventilation standards allowable concentration.