Uncertainty of geotechnical parameters in heterogeneous spoil deposits of finegrained soil materials from lignite mines

This work focuses on the geotechnical characterization of spoil materials from Greek lignite mines and presents the statistical analysis, the probabilistic distributions and the spatial variability of their basic engineering properties. A database of laboratory test results was established, and the mean, median and characteristic values and coefficients of variation are provided. In addition, the geotechnical properties were analyzed to determine the appropriate statistical distribution. Finally, the spatial variability of the spoils' properties was quantified and the scale of variation for the vertical and horizontal directions was obtained.