Quantitative prediction of unorganized particulate matter for open-pit coal mining in Gobi region
Quantitative prediction of the concentration and influence range for unorganized particulate matter generated by aerodynamic disturbances and mechanical disturbances during the development of open-pit coal mines in the Gobi area is the key point and difficulty on the atmospheric environmental impact assessment.Taking the Hongshaliang Open-pit Mine as the research object,based on the technical guideline for Compilation of Dust Source Particulate Emission Inventory(Trial)and ADMS-EIA software,an evaluation strategy of meteorological data preprocessing-unorganized source intensity accounting-model quantitative prediction was established.The grid concentrations of TSP,PM10 and PM2.5 under dust control measures were visualized by contour plot.Research shows that unorganized particulate matter from open-pit coal mine development mainly concentrates within 1000 m of the disturbed working face.Compared with regular watering dust control measures,the use of chemical covering agents can reduce the concentration contribution of TSP,PM10 and PM2.5 at 500 m downwind of the dominant wind 56%,56%,and 41%,respectively.Quantitative prediction of unorganized dust sources for open-pit mine in Gobi region can provide support for determining the atmospheric environment protection distance and assessing the feasibility of pollution control measures.
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