STABILITY ANALYSIS OF THE LARGE SCALE DUMP IN THE CZECH REPUBLIC

This paper deals with current issues of behavior of the internal large scale dump Bilina in the North Bohemia in the Czech Republic. This dump belongs to the largest and highest mine dumps in the world (the planned final height is about 220 m). There are not much experience with the behavior of this size dump body in Europe and in the world also - among this large dump includes for example the dump Hambach in Germany and several dumps in Poland and China. The topicality of the issue is given by the necessity to ensure the stability and security of the status quo, as well as forecasting the development of behavior in the future and setting data for risk analysis. Complexity of dump bodies behavior resulted from the specificity of different materials dumps, overall inhomogeneity in the horizontal and vertical direction, complex hydrogeology, manifestations of so-called dual porosity and usually a large mass of dump. Reliable verification of the material behavior respecting their distinctive rheological dependence determines the reliability and explanatory power of numerical models. Paper presents the characteristics of internal dump Bilina, characteristics of the materials forming the body dumps, the results of numerical modeling of internal stability of the dump Bilina and analysis of the results.