Α comprehensive geotechnical characterisation of overburden material from lignite mine excavations

For the sustainability of lignite and coal mining, engineers need soils' appropriate geotechnical characterisation excavations. This relates to slope stability, overall area sustainable exploitation mining areas during operational post-closure eras. work presents a novel perspective on soil mine Rather than focusing one particular mine, comprehensive provides insights about soils related areas. Additionally, stability representative cases guide analysis rather following it. The Greek mines are used as example for illustration this framework. Initially, two typical scenarios established: in presence weak zone homogeneous slope. crucial parameters then statistically examined based an extensive database established from laboratory results various mines. Focus is shear strength (friction angle cohesion), key physical properties that can provide through empirical correlations. Many layers exhibit low residual friction 5° 15°, corresponding zone. Peak mean value 28.4°, characteristic 25.0°; cohesion wide range with 111 kPa 84 kPa. Finally, cross-correlations between present large scatter, but relations estimating peak reveal general trends.