进行性大块纤维化(progressive massive fibr-osis,PMF)是煤工尘肺(coal workers’pneum-oconicsis CWP)的晚期表现,也是导致CWP患者丧失劳动能力和过早死亡的常见原因。PMF一旦发生,就有迅速发展的趋势,既使不再接触粉尘,脱离粉尘作业环境,仍可继续进展。为探讨煤工PMF发病规律及易感因素,并为制定防治措施提供科学依据,本文对四川省内的7个煤矿煤工PMF患病率进行了调查,现将结果报告如下。1 资料来源和方法 确定我省具代表性的南桐矿务局的南桐、东林、鱼田堡,天府矿务局的磨心坡、刘家沟,松藻矿务局的松藻以及嘉阳七煤矿为调查单位。调查对象均为 Progressive fibrotic fibrosis (PMF) is a late manifestation of coal workers’pneum-oconicsis CWP and is also a common cause of incapacity and premature death in CWP patients. Once the PMF occurs, there is a trend of rapid development, and it can continue to progress even if it is no longer in contact with dust and dust from its working environment. In order to explore the pathogenesis of PMF and its susceptibility factors and to provide a scientific basis for the development of prevention and control measures, this paper investigated the prevalence of PMF in seven coal mines in Sichuan province. The results are reported as follows. 1 sources and methods to determine the province’s representative Nantong Mining Bureau Nantong, Donglin, fish Fort, Tianfu Mining Mopin slope, Liujiagou, Songzao Mines Bureau of the Songzao and Jiayang seven coal mine as the investigation unit. The survey respondents are