Numerical modelling of failure propagation in fully grouted rock bolts subjected to tensile load

作者：Nemcik Jan; Ma Shuqi^*; Aziz Naj; Ren Ting; Geng Xueyu

来源：International Journal of Rock Mechanics and Mining Sciences, 2014, 71: 293-300.

DOI：10.1016/j.ijrmms.2014.07.007

• FLAC model
• Rockbolt elements
• Fully grouted rock bolts
• Non-linear bond-slip relationship
• Debonding failure process

Numerical modelling of fully grouted rock bolts loaded in tension is presented by implementing a nonlinear bond-slip relationship of bolt-grout interface into a commercial finite difference rock mechanics code. The proposed model shows a close match with the experimental results and analytical predictions in terms of load-displacement relationship, rock bolt axial force distribution and interfacial shear stress distribution. A detailed debonding failure process is also presented, which includes five successive states: elastic state, elastic-softening state, elastic-softening-debonding state, softening-debonding state and debonding state.

• 出版日期2014-10