Meanwhile, the wedge indentor tip with no wear flat was used to conduct a series of fracture experiments to detect the relation between micro-seismic locations and macro-fracture development.

• 依宏观及微观之裂缝发展及其相关之力学行为，以侧向围压与刀楔角度为试验变数，资以探讨大地应力及机械钻刀对于贯切破坏行为之影响。