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目的 确定地质勘探行业粉尘危害程度。方法 对地质勘探行业接触粉尘工种 ,采用国产个体呼吸性粉尘采样器采集、测定呼吸性粉尘浓度、总粉尘浓度和粉尘中游离二氧化硅 (FSiO2 )含量 ,并与历年接尘点的呼吸性粉尘浓度测定结果进行比较。结果 9个省 (自治区 )地质勘探行业的765个接触矽尘作业点中 ,呼吸性粉尘浓度超标率为 47.95 % ;呼吸性粉尘浓度最高的作业和工种是从事地质勘探作业的刻槽取样工种 ,1 996～ 2 0 0 0年其呼吸性粉尘浓度为 (6 .1 5± 3 .2 1 )mg/m3;地质勘探行业工人接触的呼吸性粉尘占总粉尘的比例高 ,粉尘中FSiO2 含量高。结论 地质勘探行业某些工种呼吸性粉尘暴露水平明显高于国家卫生标准 ,尤其是刻槽取样工和凿岩工。
Purpose To determine the extent of dust hazard in the geological prospecting industry. Methods To contact the geotechnical exploration industry dust workers, the use of domestic individual respirable dust sampler to collect, determine the concentration of respiratory dust, the total dust concentration and dust in the free silica (FSiO2) content, and with the dust point of the past years of respiratory dust Concentration determination results were compared. Results The out-of-standard rate of respirable dust concentration in 765 contact sites of geosinetry in 9 provinces (autonomous regions) was 47.95%. The highest respirable dust concentration was found in the groove-sampling workers engaged in geological exploration. The respirable dust concentration was (6.15 ± 3.21) mg / m3 from 1996 to 2000; the proportion of respirable dust in the geological exploration industry was higher than the total dust, and the content of FSiO2 in the dust was high . Conclusion The exposure level of respirable dust in some types of work in the geological prospecting industry is obviously higher than the national health standards, especially the groove sampling workers and the rock drilling workers.