[1]NBK Institute of Mining Engineering,University of British Columbia,Vancouver V5W1T3,Canada;
[1]NBK Institute of Mining Engineering,University of British Columbia,Vancouver V5W1T3,Canada;
[2]Department of Earth Sciences,Simon Fraser University,Vancouver V5W1T3,Canada;
Room and pillar; Shafts; Ground-support interaction; Spring analogue; Rockbolts;