1. A viscoplastic approach to the modelling of time-dependent rock behaviour at Hartebeesfontein gold mine;Malan,1999
2. Perfomance of an experimental tunnel subjected to stresses ranging from 50 MPa to 230 MPa;Ortlepp,1984
3. High ground displacement velocities associated with rockburst damage;Ortlepp,1993
4. Rock fracture and rockbursts;Ortlepp,1997
5. Rockburst mechanisms in tunnels and shafts;Ortlepp;Tunnelling Underground Space Technol.,1994