Abstract: Aiming at effect evaluation of dust control measures in mine，two key techniques are introduced: one is the judgment and processing technology of dust sample outlier，which mainly introduces the Grubbs test method to judge and handle the outlier;The other is two independent samples (prior to and after dustproof measures) mean comparison of statistical analysis methods，which mainly introduces the homogeneity test of the sample variance，and t test and approximate t test (t′ test) of the sample mean.Finally，taking the dust catching agent wetting dustproof effect in roadway tunneling working face of II 1024 machine in Huaibei Taoyuan mine for example，the application of the statistical analysis method is illustrated.

Key words: Outlier, Grubbs method, Homogeneity test, t test, t&prime, test