Mechanical and Acoustic Emission Characteristics of Marble Containing Multiple Discontinuous Fissures Exposed to Fatigue Disturbance Conditions: A Lab‐Scale Investigation

ABSTRACT Fatigue loading tests coupled with synchronized acoustic emission detection are utilized to systematically reveal the crack initiation, propagation, and coalescence in multiple fissure contained marble. Key findings reveal that fissure angle (α) and rock bridge inclination (β) critically influence volumetric deformation, energy dissipation, damage evolution, and failure patterns. Results demonstrate that higher rock bridge orientations (e.g., β = 135°) enhance fatigue resistance, while lower fissure angles (e.g., α = 30°) accelerate damage accumulation. AE parameters (counts, energy, b‐value, amplitude) are influenced by the fissure and rock bridge configuration. The width of high‐frequency band increases with increasing rock bridge segments, indicating late instability waring. Post‐test morphology description confirms tensile‐dominated fractures in low‐rock bridge orientation and high fissure angle samples; however, shear‐tensile mixed failure occurs in relatively high‐bridge orientation specimens. It is suggested that fissure communication is limited and severe fracture at rock bridge segment occurs for a sample having high rock bridge orientation.