呼吸性矽尘容许限值的研究─—有色金属矿山工人粉尘暴露与尘肺的剂量－反应关系

Studyof Allowable Limit of Occu-pational Expcsure to Quartz in Respi-rable Dust

对８个大型钨矿呼吸性粉尘中ＳｉＯ２浓度与尘肺发病关系进行了回顾性研究，使用Ｌｏｇｉｓｔｉｃ多元回归模型分析表明，如果工作３０年，尘肺发病概率≤０．０１时，平均工作的呼吸性矽尘的接触限值为２４５μｇ／ｍ￣３。按照作者的观点，在保证工人一生工作３０年，不发生任何明显的尘肺期别时，接触限值则为７０μｇ／ｍ￣３。

Abstractwe have selected eight large tungstenmines and used the methods of restrospectivecohort study.By means of logistic regression ,the results showed that the exposure limit of quartz in respirable dust is 245μg/m3 if the probability of pneumoconiosis for the 30 years length of exposure. In the author’s opinion,the exposure limit is 70μg/m3 if no pneumo-conios is will occur in a period of 30 years of exposure words :respirable silica,pneumo-coniosis, exposure limit