Nature Conditions of Waste Dumps in the Czech Part of the Upper Silesian Coal Basin

In the Czech parts of the Upper Silesian Coal Basin, tens of waste dumps of gangue material are located. These waste dumps were created during the mining of hard coal in the Czech part of the Upper Silesian Basin. It was an underground mining. As part of the mining process of opening, preparation and extraction, a large amount of gangue material remained after the extraction works and had to be deposited at waste dumps. Waste dumps are becoming a very common source of secondary raw materials, but also become a relatively common foundation soil in the Ostrava-Karvina coal district. The aim is to define the natural conditions of these waste dumps and to characterize the geological environment of these engineering geological specific districts. In terms of mining, gangues are located in the Ostrava-Karvina coal district. From the viewpoint of morphology, it is part of the Ostrava pan, which is composed of a large amount of Quaternary sediments, located on Miocene sediments external Carpathian depressions.