Affiliation: | (1) Institute for Rock Mechanics and Tunneling, Graz University of Technology, Rechbauerstrasse 12, 8010 Graz, Austria;(2) Institute of Engineering Geology and Applied Mineralogy, Graz University of Technology, Rechbauerstrasse 12, 8010 Graz, Austria;(3) Exponent Failure Analysis Associates, 149 Commonwealth Drive, Menlo Park, CA 94025, USA |