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本文调查了一个褐煤矿和402名井下工人,结果:煤尘中游离二氧化硅含量为2.4～6.6%;粉尘浓度平均为4.7～12.0mg/m~3;检出煤尘肺1人,观察对象14人,慢性支气管炎患病率为20.4%。实验结果:褐煤尘所致尘肺的特点是纤维化程度很轻,进展缓慢,以纤维性煤尘细胞灶为主,并伴有局灶性肺气肿的尘肺。
In this paper, a brown coal mine and 402 underground workers were surveyed. The results showed that the content of free silica in coal dust was 2.4-6.6% and the average dust concentration was 4.7-12.0mg / m ~ 3. 14 people, the prevalence of chronic bronchitis was 20.4%. The experimental results: The characteristic of pneumoconiosis caused by lignite dust is the degree of fibrosis is very low, the progress is slow, the fibrous foci are characterized mainly by the foci, and the pneumoconiosis accompanied by pneumoconiosis.