中文摘要：

通过对鄂尔多斯伊金霍洛旗纳林陶亥煤矿区一年内大气降尘监测样点的数据分析,研究了煤矿区大气降尘的特征,评价了煤矿区大气环境的污染程度。结果表明：从一年内降尘量月平均分布特征来看,年内降尘量最高的月份为12月,降尘量最高达到128.94t/km^2·30d,最低月份为4月,仅为42.86t/km^2·30d,冬春季降尘量明显高于夏秋季;从降尘区域分布特征来看,工业区、采坑及周边、交通区是主要的降尘分布区,年度平均降尘量在88.79-149.65t/km^2·30d之间,明显高于居民区的77.83t/km^2·30d和农业区的73.93t/km^2·30d;从降尘量的空间分布特征来看,距离采矿核心区域0-1000m范围的年均降尘量最小为62.36t/km^2·30d,1000-3000m范围内,大气降尘均量达峰值为128.69t/km^2·30d,随距离的变化降尘量呈衰减趋势;对比自治区其他省份降尘限值要求,研究区明显高于其他地区,采煤活动已对伊金霍洛旗纳林陶亥矿区造成了严重的粉尘污染,采煤活动是大气降尘的主要来源。

英文摘要：

To evaluate the pollution level of atmospheric environment in coal mining area, the dust fall character- istics of monitoring samples in coal mining area were investigated. The study site is located in Yi Jin Huo Luo of Ordos, Inner Mongolia, China. The results indicated that the dustfall in December was the maximum, it was of 128.94t/km2 · 30d. The dustfall in April was the smallest, with about 42.86t/km2 · 30d. The monthly mean dustfalls in the spring and winter were significantly higher than that in summer and autumn. The distribution characteristics of dustfall area showed industrial area, mining area, transportation area were the main distribution area of dustfall. The annual average dusffall was 88.79t/km2 · 30d N 149.65t/km2 · 30d for the main distribu- tion area of dustfall. 77.83t/km2 · 30d and 73.93t/km2· 30d of the dustfalls were collected respectively in res- idential area and agricultural area. The dustfalls in the main distribution area were significantly higher than that of the residential area and agricultural area. The trend of dustfall decreased with the change of distance. Compared to the dust limit of other provinces and autonomous regions, dust in the study area was significantly higher than other regions, That indicate the coal mining was the main source of dusffall.