Analysis of dust and noise exposure levels in the manufacture of non-metallic mineral products industry in China from 2020 to 2021
Objective To understand the exposure levels of dusts and noise in the manufacture of non-metallic mineral products industry in China for the implementation of the special intervention of occupational hazards and improvement of the working environment.Methods A total of 14 818 enterprises in the manufacture of non-metallic mineral products industry from the National Surveillance System for Occupational Hazards in the workplace in 2020 and 2021 were included.The difference in concentration(intensity)and over-limit ratio of dust and noise among enterprises with different industry types and different sizes was analyzed by Kruskal-Wallis H test and Chi-Square test.Results The over-limit ratio of coal dust,silica dust,cement dust and noise were 3.90％,27.23％,15.94％and 35.76％,respectively.The median time-weighted average concentration of coal,silica and cement dust was 0.53,0.42 and 0.61 mg/m3,respectively.The median of normalization of equivalent continuous A-weighted sound pressure level to a nominal 8 h working day or 40 h working week was 83.1 dB(A).The differences in the concentration(intensity)and over-limit ratio of various factors in different industries were generally statistically significant.Except for silica dust(free silica content＞50％),the concen-tration(intensity)and excess rate of other factors in small-and micro-sized enterprises were generally higher than those in large and medium-sized enterprises in various indicators.Conclusion The concentration(intensity)of dust and noise in the manufacture of non-metallic mineral products industry in China is relatively high,especially in small and micro enterprises.Enterprises should be encouraged to implement the main responsibility for the prevention and control of occupational diseases,reduce the exposure level of dust and noise of workers,and carry out occupational health examination on schedule to effectively protect the health of workers.
Manufacture of other non-metallic mineral products industryDustNoiseSurveillance
万方数据
维普
