镍矿工人粉尘接触量与尘肺发病关系的研究

Epidemiological study on the relationship between nickel exposure level of nickel mining workers and silicosis incidence rate.

本文用寿命表法对某镍矿的562名接尘工人,其中Ⅰ期尘肺患者7人,进行了接尘量与尘肺发病关系的研究。结果表明,如欲将尘肺患病率控制在1%以下,工作30年,作业环境平均浓度不应超过3.41mg/m^3。结果提示,从粉尘浓度、游离SiO_2含量、分散度等综合考虑,与其它金属矿山尘肺发病情况比较基本近似,未发现有何特殊性。认为其致病程度主要取决于粉尘浓度和游离SiO_2含量的高低。

The relationship between nickel dust exposure level of workers in a nickel mine and silicosis incidence rate was studied epidemiolo-gically and was analyzed by means of life table method. 562 workers exposed to nickel dust were chosen as subjects. Among them, 7 men had suffered from Ⅰ grade silicosis. The results showed that the workplace average concentration of dust should not exceed 3.41mg/m^3 if the silicosis incidence rate has to be kept below 1% with 30 years working period. It was also considered that the severity of silicosis depends on nickel dust level in the orkplace and silica content in the dust.