Failure Mechanism of Rock Materials Containing Pre-existing Notch

Dr. Haeri is an Assistant Professor of Rock Mechanics in the Department of Mining Engineering at Shahid Bahonar University of Kerman, Iran. He earned his Ph.D. in Rock Mechanics from the Islamic Azad University, Science and Technology Branch, in 2014. Following that, he worked as a postdoctoral fellow at Sharif University of Technology for two years, with funding from the Iran National Elite Foundation. His research interests include both experimental and numerical simulations related to fracture mechanics and crack propagation in concrete, rocks, and other brittle materials. He also focuses on tunnel excavation technologies and the development of innovative testing methods to assess the fracture toughness of these materials.Dr. Sarfarazi is an Associate Professor of Rock Mechanics in the Department of Mining Engineering at Hamedan University of Technology, Iran. He obtained his BSc degree from Shahid Bahonar University and his PhD from Tarbiat Modares University, both in Iran. Dr. Sarfarazi is actively involved in research and teaching related to rock mechanics and numerical modeling. His research interests include experimental investigations of crack propagation in rock bridges, numerical simulations of the shear behavior of echelon joints, and the development of new testing methods to determine the fracture toughness of brittle materials.Dr. Jinwei Fu is a Full Professor and Ph.D. supervisor at North China University of Water Resources and Electric Power. He earned his Ph.D. in Geotechnical Engineering from Shandong University in 2015. Subsequently, he served as a visiting scholar at the University of Minnesota in the United States, an opportunity funded by the Chinese government. His research interests encompass underground construction, multidimensional underground space function coupling, tunnel excavation technologies using Tunnel Boring Machines (TBMs), and rock and soil mechanics.Dr. Mohammad Fatehi Marji is a Professor of Mine Exploitation Engineering at Yazd University, where he served as the Head of the Department for over five years. He is also the Chief Editor of the research journal *Analytical and Numerical Methods in Mining Engineering*. Dr. Marji earned his Ph.D. in Mining Engineering, specializing in Rock Mechanics, from Middle East Technical University (METU) in 1997. His areas of expertise include Rock Mechanics, Fracture Mechanics, Discrete-Domain Modeling (DDM), and Petroleum Geomechanics.

• Summarizes the crack evolution behaviour of rocklike materials and real rocks from the experimental and numerical viewpoint.- Summarize a systematical analysis on fracture coalescence behaviour of rock like material containing two parallel fissures under uniaxial compression by the experimental and numerical simulation.- Deals with an investigation on the failure mechanical behaviour of rock mass containing two unparallel fissures under confining pressure using experimental test and PFC simulation.- Summarise a systematical analysis on fracture coalescence behaviour of rock like material containing three unparallel fissures under uniaxial compression by the experimental and numerical simulation.- Summarizes the influence of non-persistent joint sets on the failure behaviour of rock like material under uniaxial compression test.- Describe the effects of interaction between multiple small holes and a single notch on the mechanical behavior of artificial gypsum specimens using experimental test and numerical simulation.- Describe the effect of rock bridge continuity and area on shear behavior of sliding surface.- Deal with the failure mechanism of echelon non-persistent open joints under shear loading using experimental test and PFC2D simulation.- Describe the physical test and PFC modelling of notched rock pillar failure.- Discussed the influence of non-persistent notch on the rock fragmentation mechanism underneath the U shape TBM cutters using experimental tests and numerical simulations with PFC2D.- Describe the interaction between rock bolt and rock bridge under both of the axial tensile loading and direct shear loading.