【摘要】 研究煤矿井下工人实际接尘工龄及脱尘率对评价粉尘危险度、进行尘肺发病预测具有重要意义。笔者采用回顾性队列研究方法。对某煤矿1958～1988年入矿工人实际接尘工龄及脱尘情况进行分析。结果表明:①工种对接尘工龄有影响。例如接尘10年时,采煤工累积脱尘概率为32.36%、掘进工为21.94%、辅助工为21.65%,差别非常显著;②接尘工龄与工人进矿年代有关。累积脱尘率达30%时,1958～1964、1965～1969、1970～1974、1975～1979年各队列接尘工龄分别为15年、12年、9年和7年。依此统计结果推测,1975～1979年进矿工人接尘工龄达20年者将低于30%;1980年以后进矿者实际接尘工龄则将会更短。更多还原

【Abstract】 It is important to study the practical dust exposure year and out-of-dust rate for the evaluation of dust level and to predict pneumoconiosis incidence in coal miners. A Retrospective Cohort Study was carried out on the calculation of practical dust exposure year and the out-of-dust rate among coal miners employed during 1958-1988 in a mine. The results showed that job variety had a strong effect on dust exposure year and that out-of-dust rate beared relationship to the years of employment. It can be estimated that.the percentage of coalminers who were employed in 1975-1979 with dust exposure year reached 20 years would be less than 30%, and that those being employed after 1980 would be even lesser.更多还原