Affiliation: | 1. Department of Engineering, Trumpington Street, Cambridge CB2 1PZ, U.K.;2. University of Manchester;3. Central Mining Research Station, Dhanbad, India;4. Department of Mining Engineering, University of Utah, U.S.A.;5. Department of Civil Engineering, University of Delft, The Netherlands;6. Technion, Haifa, Israel;7. Department of Civil Engineering and Engineering Mechanics, University of Arizona, Tucson, Arizona 85721, U.S.A. |