为了探讨铁路隧道施工作业环境中有无诱变和致癌性物质存在,给改善隧道施工生产环境进一步提供科学依据,我们选择了部分从事隧道施工作业,经胸片检查砂肺为“○”及“○～Ⅰ”期的工人,测定其淋巴细胞姐妹染色单体交换(SCE)频率,同时选择部份不接触有害物质,经检查身体基本健康的房屋建筑工人作对照测定,现将测定结果报道如下。 In order to explore the existence of mutagenic and carcinogenic substances in railway tunnel construction operation environment and to provide scientific basis for improving the tunnel construction production environment, we chose to engage in some tunnel construction operations. The lung tests were “◯” and “ ○ ~ Ⅰ ”workers to determine their lymphocyte sister chromatid exchange (SCE) frequency, while the selection of some do not come into contact with harmful substances, after checking the basic health of the housing construction workers as a control test, the measurement results are reported below .