A preliminary study on coal seam correlation is carried out with the gray relational analysis of B-mode (GRABM). The result shows that this kind of analysis method may have a distinct advantage over the traditional coal seam correlation ways. It proves that this method is the most convenient analysis one among the regression analysis, discrimination function analysis and cluster analysis. A preliminary study on coal seam correlation is carried out with the gray relational analysis of B-mode (GRABM). The result shows that this kind of analysis method may have a distinct advantage over the traditional coal seam correlation ways. It proves that this method is the most convenient analysis one among the regression analysis, discrimination function analysis and cluster analysis.