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为了解养路工人的职业危害情况,我们对某公路段沙土路队进行了劳动卫生学调查。现将调查结果报告如下。粉尘浓度测定:粉尘浓度分东、西、南、北4个点,4个点之间的距离均为20Km,用滤膜称重法测定;分散度用目、物镜测微尺测定;游离SiO_2含量测定用焦磷酸重量法。测定3次。调查对象:该段各养路队粉尘作业工人54人为接触组,其中男49人,女5人,平均年龄39岁,最小21岁,最大58岁。工龄最长31
In order to understand the occupational hazards of road maintenance workers, we carried out a survey on labor hygiene of sand road teams in a highway section. The survey results are reported below. Determination of dust concentration: the dust concentration points East, West, South and North 4 points, the distance between the 4 points are 20Km, measured by the membrane weight; degree of dispersion with the objective micrometer scale determination; free SiO_2 Determination of content with pyrophosphate gravimetric method. Determination of 3 times. Survey respondents: In this section, 54 road maintenance workers working on dust were contact groups, 49 men and 5 women, with an average age of 39 years, a minimum of 21 years and a maximum of 58 years. The longest service life 31