Analysis of borehole instability due to grouting pressure

초록

A new borehole breakdown model with external in-situ stresses as well as internal grouting pressure is proposed in this study. For this, a bifurcation analysis together with a tensile fracturing model have been employed to simulate the crack propagation and eventual breakdown of the borehole. Numerical examples are also introduced to verify the proposed model on crack propagation and comparison with experimental data on shear and tensile cracking mode are made wherever possible.