摘要
目的:探讨宽厚板热轧生产线操作值班室隔声改造对劳动者噪声暴露水平的影响。方法:于2019年9月,以现场职业卫生调查为基础,采用回顾性方法收集2007至2017年某钢铁厂轧钢生产线25个固定操作室和操作室工作人员噪声测量数据作为研究资料,对研究资料中隔声改造前后噪声暴露水平进行统计分析。结果:与隔声改造前比较,隔声改造后操作室工作人员噪声接触值降低、0级[8小时等效噪声(L EX,8 h)≤85 dB(A)]噪声作业合格率、操作室设计限值合格率均提高,差异有统计学意义(P<0.01);改造后消除了II级及以上噪声危害作业,操作室工作人员8 h等效连续A声级(L Aeq,8 h)>75 dB(A),但改造后各操作室噪声水平仍不符合工效限值标准。结论:隔声改造可有效改善噪声工作场所操作室工作环境,降低劳动者噪声暴露水平。
Objective To investigate the effect of sound insulation improvement on the noise exposure of workers in the operation room of hot rolling line for wide and heavy plate.Methods From September 2019 to September 2017,based on the occupational health Survey,the data of 25 fixed operation rooms and workers in operation rooms of a steel rolling production line were collected retrospectively,the noise exposure levels before and after the improvement of sound insulation were statistically analyzed.Results The noise exposure value of the workers,the qualified rate of 0 Grade 8 hours equivalent noise(LEX,8 h)≤85 dB(A)and the qualified rate of the design limit value of the operation room were all higher than those before the modification,the difference was statistically significant(P<0.01),after the renovation,the Class II and above noise hazards were eliminated,the equivalent continuous a sound level(LAeq,8 h)>75 dB(A)of the workers in the operation room was 8h,and the noise level in the operation room still did not meet the Ergonomics limit standard.Conclusion The improvement of sound insulation can effectively improve the working environment of noise workplace operating room and reduce the workers'noise exposure level.
作者
陈国顺
张焕玲
刘瑞贞
谷桂珍
余善法
Chen Guoshun;Zhang Huanling;Liu Ruizhen;Gu Guizhen;Yu Shanfa(Wugang Institute for Occupational Health,Wugang 462500,China;General Hospital of Wugang Company,Wugang 462500,China;Henan Provincial Institute for Occupational Health,Zhengzhou 450052,China;Henan Medical College,Zhengzhou 451191,China)
出处
《中华劳动卫生职业病杂志》
CAS
CSCD
北大核心
2020年第8期582-585,共4页
Chinese Journal of Industrial Hygiene and Occupational Diseases
基金
国家自然科学基金面上项目(81372940,81872574)
国家科技支撑计划课题(2014BAI12 B03)。
关键词
噪声
职业接触限值
暴露
隔声
技术改造
Noise
Occupational exposure limit
Exposure
Sound insulation
Technological transformation
