【摘要】 目的探讨不同煤质煤尘对尘肺患病的影响。方法用回顾性流行病学方法对广西3种不同煤质的12个煤矿进行尘肺患病率、历年粉尘浓度、粉尘游离二氧化硅含量情况进行调查分析。结果褐煤、烟煤、无烟煤作业场所历年平均粉尘浓度(mg/m3)分别为68.75、24.01、17.18,游离二氧化硅含量(%)分别为11.07、59.77和13.78。褐煤、烟煤、无烟煤煤矿工人尘肺患病率(%)分别为0.15、6.70、1.58。褐煤矿接尘工人尘肺患病率明显低于烟煤、无烟煤矿工人(P<0.001)。结论广西煤工尘肺患病率以烟煤矿最高,无烟煤矿次之,褐煤矿最低。不同煤质煤矿尘肺患病率差异除了与粉尘浓度和游离二氧化硅含量有关外,还可能有其它影响因素。研究结果提示,在今后修订煤尘卫生标准时,可能需要根据不同的煤质制订相应的卫生标准。更多还原

【Abstract】 Objective To study the influence of different coal ranks on the prevalence of pneumoconiosis.Methods Pneumoconiosis prevalence was investigated epidemiologicaly in seven brown,three bitulminous,and two anthracite coal mines.Data on historical air dust concentrations and free silica contents of the dusts were collected.Results The average dust concentration and free silica content in brown,bituminous and anthracitic coal mines were68.75mg/m 3 and24.01%,17.18mg/m 3 and11.07%,59.77mg/m 3 and13.78%respectively.The prevalences of pneumoconiosis in brown,bituminous and anthracitic coal mines were0.15%,6.70%,and1.58%respectively.These differences of pneumoconiosis prevalence among three types of coal mines were staˉtistically significant(P<0.001).Conclusion The prevalence of pneumoconiosis in bituminous coal mines was higher than that in anthracitic coal mines and brown coal mines.Besides dust concentration and the content of free silica in the dust,other factors may also influence the development of pneumoconiosis in coal mines.更多还原