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目的探讨四川省自贡市极薄煤层煤矿煤工尘肺流行病学及影像学特点,为极薄煤层煤矿煤工尘肺防治提供基础性依据。方法对自贡市2004-2011年诊断资料完整的672例煤工尘肺采取回顾性调查研究;采用分层抽样,对15家煤矿企业的总粉尘浓度和游离二氧化硅含量进行现场检测;并用Spss20.0进行统计分析。结果 672例煤工尘肺来源于荣县和富顺县。发病工种主要为采煤工,占总数的69.05%。Ⅰ、Ⅱ、Ⅲ期煤工尘肺平均发病工龄分别为16.43年、16.98年和18.37年。606例煤工尘肺胸片影像表现以圆形小阴影为主,其中q影431例,占总数的71.12%。15家企业106个岗位的8 h时间加权平均浓度均超过国家职业卫生限值,88.89%的粉尘的游离二氧化硅含量大于10%。结论自贡市煤工尘肺的防治重点为荣县和富顺县的采煤工,其胸片影像以小阴影q影为主。
Objective To investigate the epidemiology and imaging features of coal workers ’pneumoconiosis in the extremely thin seam coal mines in Zigong City, Sichuan Province, and provide a basis for the prevention and control of coal workers’ pneumoconiosis in extremely thin seam coal mines. Methods A retrospective investigation was carried out on 672 coal workers’ pneumoconiosis diagnosed in Zigong City from 2004 to 2011. The total dust concentration and free silica content in 15 coal mines were detected on site by stratified sampling, and Spss20 was used. 0 for statistical analysis. Results 672 coal workers’ pneumoconiosis originated from Rongxian County and Fushun County. The main types of workers for coal mining workers, accounting for 69.05% of the total. The average length of service for coal miners’ pneumoconiosis in stages I, II and III were 16.43, 16.98 and 18.37 years respectively. 606 cases of coal workers pneumoconiosis chest X-ray film showed a small round shadow, of which 431 cases q, accounting for 71.12% of the total. The weighted average concentrations of 8 hours in 106 posts of 15 enterprises exceeded the national occupational health limits, and 88.89% of the dust contained more than 10% of free silica. Conclusion The focus of prevention and treatment of coal workers’ pneumoconiosis in Zigong City is coal mining workers in Rong County and Fushun County.