The following were investigated: chemical and mineralogical composition, as well as contents of trace elements in the roof rocks of the 610 and 620 coal seams. The geochemical conditions of the sedimentation environment were described. It was done on the base of pH and Eh measurements, contents of boron and chlorine and localization of sea horizons which were placed above coal seams roofs. The prediction of trace elements contents from mining wastes was also done. The results of investigations and correlation between chemical components and trace elements contents, indicated different geochemical conditions of the sedimentation environment of the roof rocks. Geochemical conditions influenced the amount of harmfull elements in investigated rocks which are assumed to be potential mining wastes.