The quality of coal and hydrogeological characteristics in deposit 'Delići and Peljave-Tobut' near Ugljevik

Geological study of 'Delici and Peljave - Tobut' coal deposit, located in north-eastern part of the Republic of Srpska (B&H), has given a new insight into geological structure of coal-bearing series and quality of coal. Coal-bearing series was formed in a lower Miocene lake and has complex geological-tectonic structure and litho-facial diversity. Two coal seam are identified within this series - the older one, so-called the Main coal seam (developed throughout the deposit; with major coal reserves) and the younger one - Upper coal seam, which is of a restricted areal extent. Coal from this deposit has a variable ash content -34.91% on average in the Main seam and 44.58% on average in the Upper seam. This coal has an average sulfur content of 3.73% in the Main seam and 2.73% in the Upper seam. An average moisture content is 19.07% in the Main seam and 18.26% in the Upper seam. An average lower heating value is 111.671 kJ/kg for the Main seam and 7.952 kJ/kg for the Upper seam. Petrographic study of coal have shown that the coal of this deposit has high content of huminite, increased content of liptinite, low content of inertinite and increased content of mineral matter. Densinite is a dominant maceral of huminite group, while ulminite is less abundant. The content of other macerals of this group is low