Ghose Mrinal K, Majee S R
Centre of Mining Environment, Indian School of Mines, Dhanbad, 826004, India.
Environ Monit Assess. 2007 Jul;130(1-3):17-25. doi: 10.1007/s10661-006-9448-6. Epub 2007 Feb 7.
Surface coal mining creates more air pollution problems with respect to dust than underground mining . An investigation was conducted to evaluate the characteristics of the airborne dust created by surface coal mining in the Jharia Coalfield. Work zone air quality monitoring was conducted at six locations, and ambient air quality monitoring was conducted at five locations, for a period of 1 year. Total suspended particulate matter (TSP) concentration was found to be as high as 3,723 microg/m(3), respirable particulate matter (PM10) 780 microg/m(3), and benzene soluble matter was up to 32% in TSP in work zone air. In ambient air, the average maximum level of TSP was 837 microg/m(3), PM10 170 microg/m(3) and benzene soluble matter was up to 30%. Particle size analysis of TSP revealed that they were more respirable in nature and the median diameter was around 20 microm. Work zone air was found to have higher levels of TSP, PM10 and benzene soluble materials than ambient air. Variations in weight percentages for different size particles are discussed on the basis of mining activities. Anionic concentration in TSP was also determined. This paper concludes that more stringent air quality standards should be adopted for coal mining areas and due consideration should be given on particle size distribution of the air-borne dust while designing control equipment.
与地下采煤相比，露天采煤产生的粉尘造成的空气污染问题更多。对贾里亚煤田露天采煤产生的空气传播粉尘的特性进行了调查。在六个地点进行了工作区空气质量监测，在五个地点进行了环境空气质量监测，为期一年。发现工作区空气中总悬浮颗粒物（TSP）浓度高达3723微克/立方米，可吸入颗粒物（PM10）780微克/立方米，TSP中苯可溶物含量高达32%。在环境空气中，TSP的平均最高水平为837微克/立方米，PM10为170微克/立方米，苯可溶物含量高达30%。TSP的粒度分析表明，它们在本质上更易于吸入，中位直径约为20微米。发现工作区空气中的TSP、PM10和苯可溶物质水平高于环境空气。根据采矿活动讨论了不同粒径颗粒的重量百分比变化。还测定了TSP中的阴离子浓度。本文得出结论，煤矿区应采用更严格的空气质量标准，在设计控制设备时应充分考虑空气传播粉尘的粒径分布。
