大同矿区矿井通风排放粉尘的实验研究

摘要

In order to analyze characteristics of ventilation emission dust and how ventilation emission dust impact atmospheric pollution and human health,the author selected two produc-tion mines in Datong coal mine area,and collected samples of ventilation emission dusts as ob-jects of study.According to compare experimental analysis on granulometric distribution of venti-lation emission dusts,appearance features of dust particles and categories and contents of heavy metal element,the author found,in the two samples,the dust with 10 ~75 μm of particle size had the highest proportion;in analysis of heavy metal elements,Mn had the largest percentage of quality;while the dust with 0~10 μm of particle size had the greatest effect on human respirato-ry system,it apparently had higher proportion in low synthesis dust prevention coal mines than high synthesis dust prevention coal mines.%为了分析矿井通风排放粉尘的特性以及其对大气污染和人类健康的影响,选取大同矿区两组生产矿井,采集通风排放粉尘样本作为研究对象,对通风粉尘的粒径分布、粉尘粒子的形貌特征和重金属元素种类及含量等进行实验分析对比,实验发现,两组样本中粒径为10~75μm 的粉尘所占比例最高,重金属元素 Mn 在重金属元素分析中所占质量百分比最大,而对人类呼吸系统影响最大的粉尘粒径为0~10μm,其所占比例在综合防尘较差的矿井明显高于实施综合防尘的矿井。