Abstract
The assessment of deep-seated rock in terms of engineering geology and geotechnology with respect to its suitability as a host rock for a final repository for radioactive waste requires the knowledge of the in-situ behavior of the rock in particular the stress and deformation behavior as well as the knowledge of permeability. The waterpercolation through fissured granite and the stress field is being studied in a Swiss German cooperation by the Federal Institute for Geosciences and Natural Resources (BGR) in the Grimsel Rock Laboratory in Switzerland. This laboratory is operated by the National Corporation for the Storage of Radioactive Waste (NAGRA) of Switzerland. German participants are the BGR and the Research Centre for Environmental Sciences (GSF). BGR is responsible for the Fracture System Flow Test (BK), a modified water injection test and advanced Rock Stress Measurements (GS) in deep boreholes.
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