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本文对５０年代末从事某水电站施工者，在离尘二十五年后进行了十年死亡观察，结果接尘组中矽肺患者的死亡率显著高于非矽肺者（Ｐ＜００１），其次不同工种死亡率，风钻工又明显高于清碴工和混合工（Ｐ＜００１）。在队列调查中，接尘组恶性肿瘤、呼吸系病、结核病死亡率亦显著高于对照组，其接尘组的观察死亡数均多于预期死亡数，同时年龄越大，标化死亡率越高。可见短期高浓度接尘者，在长期离尘后，对其个人寿命，仍将存在着潜在的危害
In this paper, a hydropower station construction in the late 1950s conducted a decade-long death observation after leaving dust for 25 years. As a result, the mortality of patients with silicosis was significantly higher than that of non-silicosis patients (P <001) Second, the mortality of different types of work, wind drilling workers was significantly higher than the ballast and mixed workers (P <0 01). In the cohort survey, the incidence of malignant tumors, respiratory diseases and tuberculosis in the dust-receiving group was also significantly higher than that in the control group. The observed deaths in the dust-exposed group were all more than the expected deaths. At the same time, the older the standardized mortality rate high. Visible short-term high concentration of dust, in the long-term dust, its personal life, there will be a potential harm