重庆煤矿尘肺发病规律研究

为探索重庆煤矿尘肺发病规律，对重庆1986年在册的47038名接尘工人进行了回顾性调查。结果显示，重庆煤矿尘肺患病率为13．0％．平均发病工龄为20年，平均发病年龄为46岁，尘肺死亡率为24．5％，平均死亡年龄为58．2岁，大块纤维化患病率为1．6％；尘肺的发生与工人接触高合矽量、高浓度粉尘有关；重庆煤矿粉尘中游离SiO2，平均含量为8．5％，尘肺病例以煤矽肺和煤肺为多，矽肺病例相对较少；防尘工作重点应放在采煤工作面。

Examination on the pattern of pneumoconiosis incidence in coalmines in chongqing

A retrospective study has been carried out on 47,038 coal miners exposed to dust with a view tofind out the pattern of pneumoconiosis incidence in coal mines in Chongqing. The study shows that the rate ofpneumoconiosis incidence in coal mines in Chongqing is 13.0%,occurring on those 46 yearold miners whohave served in coal mines for twenty years on the average. The mortality rate of this disease is 24.5%, happening on 58. 2 yearold miners on average;and the prevalence rate of progressive massive fibrosis is 1. 6%.The prevalence of pneumoconiosis is related to miners exposure to. the dense dust with a high SiO2 content.which reaches 8. 5% in the dust of the coal mines in Chongqing. Pneumoconiosis patients are mostly that ofanthracosilicosis and anthracosis,with only a few of silicosis. The major part of the antidust effort in the coalmines in Chongqing should be made on the mining site where the miners actually work.