Geomechanical characterization and analysis of the Upper Cretaceous flysch materials found in the Basque Arc Alpine region

Flysch materials are one of the most challenging geological and often give rise to slope instability problems. Due its natural heterogeneity, geomechanical characterization flysch is somewhat difficult. The Spanish Basque Arc Alpine region a very well-known location for materials. In this paper, an area approximately 100 km2 in intensively studied their geomechanically characterized. A total 33 locations investigated by broad geological-geotechnical investigation, involving petrographic analyses, stations, boreholes, mechanical laboratory tests. addition, inventory was carried out assess situation existing slopes area. Characterization terms RQD, RMR, GSI as well using Hoek–Brown failure criterion. Different correlations assessed, establishing appropriateness estimating parameters material rock mass.