Research on influencing factors of air pollution in open-pit mines based on environmental safety improvement

doi:10.16265/j.cnki.issn1003-3033.2023.S2.0021

Abstract

Abstract:

In order to understand the air pollution situation in the mining pit and develop effective control measures, the three-dimensional monitoring system of air quality in open-pit mines was established based on the bucket shovel. The meteorological elements, dust concentration, CO concentration, and other parameters in the mining pit were continuously monitored. By comparing the frequency and concentration of pollutants, the main pollutants were determined. By analyzing the changes in dust concentration with meteorological factors, the impact of each factor on mining pit pollution was determined. The research shows that the frequency of CO generation is much lower than that of PM₁₀ and PM_2.5, and dust particles are the main atmospheric pollutants in the mining pit. Temperature, humidity, and wind speed are the main influencing factors of pollutants. As temperature increases, and humidity decreases, dust concentration increases. As wind speed increases, wind erosion and dust generation have a significant effect, resulting in an increase in dust concentration. Measures to increase humidity can be taken to reduce dust pollution in the mining pit, while exposed surfaces should be managed to reduce the impact of wind erosion and dust generation.

Key words: open-pit mine, bucket shovel dumping technology, air pollution, on-line monitoring, influencing factors

CLC Number:

X964工业防尘

WANG Guilin, ZHAO Changhai, SONG Delin. Research on influencing factors of air pollution in open-pit mines based on environmental safety improvement[J]. China Safety Science Journal, 2023, 33(S2): 77-84.

Figures/Tables 9

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参数	测量范围	分辨率	精度
温度/℃	-40~80	0.1	0.2
湿度/%RH	0~100	0.1	3
大气压力/kPa	30~120	0.01	0.1
风速/(m·s^-1)	0~60	0.1	0.3
风向	16个风向	—	—
PM_2.5/(μg·m^-3)	0~999	1	3%F.S
PM₁₀/(μg·m^-3)	0~999	1	3%F.S
CO质量浓度/(mg·m^-3)	0~1 000	0.1	3%F.S

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