VNNIOSH Journal of Science: Safety - Health & Working environment Journal No.1/2024
Mai Ngọc Thanh, Nguyễn Thị Hiền , Bùi Thị Ngọc Minh, Nguyễn Hương Trà My
of Occupational Safety and Health in the Southern Vietnam
Abstract:
A cross - sectional survey was conducted on 80 working environment measurement samples at underground coal mining and 40 measurement samples at other locations, not underground coal mining. Research locations at two coal mining companies in Quang Ninh province. Research using calibrated measuring equipment. Measuring methods according to the instructions in the Technical Regulations on Occupational Health and Environment of the Ministry of Health. Measurement results are compared with current Standards. The results of measuring the working environment in the exposed group had a higher proportion of samples that did not meet the allowable standards than in the comparison group in terms of humidity, wind speed, and noise. The average results of these parameters in the exposure group were higher than in the comparison group. The measurement results of coal dust concentration in the exposed group are dozens of times higher than the allowed standard. Specifically, the average total dust concentration measured in the exposed group was 61.16 mg/m3, more than 20 times higher than the allowed standard (3 mg/m3). The average concentration of respiratory dust in the exposed group was 23.06 mg/m3, more than 11 times higher than the allowed standard (2 mg/m3).
Keywords: underground coal mining, working environment.
source: vnniosh.vn
