The uncontrolled methane rises to the ground surface within the Ostrava Trough (ODP) and the Petřvald Trough (PDP) (the Czech part of Upper Silesian Coal Basin) are connected with the transient (PDP) or quasi- -stationary regime (ODP) of fluids within the anthropogenic influenced hydraulic conditions of the Carboniferous massif—attributed to the effect of mining exploitation closure. Such a situation create a long-lasting hazard to the natural environment, man’s safety and property. The methane rises to the ground surface within the Polish part of the USCB are not such a significant problem yet. Future liquidation of coal mines however, should be preceded by preparation of sufficient prevention against this phenomena. The preferred solution is the active, controlled degassing, and lowering the pressure in the vadose zone, above the water level within the flooded mining areas.