The join strength, penetration depth and condition of emerging adiabatic shearinstability are discussed with single particle of uniform speed and different angle.
The basic failure mode of borehole is borehole avalanche and shear zone caused by bore instability.
井眼基本破坏形式是由于不稳定性造成的井眼岩石崩落坍塌和剪切带。
3
How to judge the slopes state with FEM based on shear strength reduction methods, stability or instability based on the results of FEM is a key problem.