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我局承建的米花岭隧道出口,钭井和平行导坑三个工区的施工任务、施工环境劳动卫生监测表明:隧道内温度随季节变化在16～26℃之间,空气中氧含量基本达到《隧规》要求,一氧化碳浓度爆破后最高,随后逐渐下降,粉尘浓度等以爆破、喷浆两个工序较高,波动在4.3～13.7mg/m~3之间。
The construction tasks of the three work areas including the Mihualing tunnel exit, the well shaft and the parallel pilot pit under construction by our bureau and the labor hygiene monitoring on the construction environment showed that the temperature in the tunnel varied with the season at 16-26 ℃ and the oxygen content in the air basically reached “ Tunnel Regulation ”requirements, the highest concentration of carbon monoxide after the explosion, and then gradually decreased, the concentration of dust to blasting, shotcrete two processes higher, fluctuations in the 4.3 ~ 13.7mg / m ~ 3 between.