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介绍采用ＮＣＺ－１粉、多面空心球及ＣＨ２Ｃｌ２溶剂直接采集井下尘样，用ＭａｓｙｅｒｓｉｚｅｒＸ仪测定分散度的新方法，并在煤矿井下进行了实际测定与分析。
This paper introduces a new method of direct sampling of downhole dust samples with NCZ-1 powder, multi-faceted hollow spheres and CH2Cl2 solvent and the degree of dispersion with MasyersizerX. The actual measurement and analysis are carried out in coal mine.