Failure Mechanism of Rock Materials Containing Pre-existing Notch

Failure Mechanism of Rock Materials Containing Pre-existing Notch

von Hadi Haeri

This book explores the impact of notch geometry on the strength failure and crack evolution behavior of rock materials. It quantitatively compares simulated results from discrete element modeling with experimental findings related to the fracture mechanics of rock materials containing defects. Additionally, it establishes a relationship between the processes of crack evolution and the distribution of acoustic emissions in pre-fissured rock materials throughout the deformation process. The book discusses the mechanisms of crack evolution in pre-fissured rock materials under various confining pressures and analyzes how non-persistent joints affect the failure mechanisms of notched rock from a practical perspective.

This book explores the impact of notch geometry on the strength failure and crack evolution behavior of rock materials. It quantitatively compares simulated results from discrete element modeling with experimental findings related to the fracture mechanics of rock materials containing defects. Additionally, it establishes a relationship between the processes of crack evolution and the distribution of acoustic emissions in pre-fissured rock materials throughout the deformation process. The book discusses the mechanisms of crack evolution in pre-fissured rock materials under various confining pressures and analyzes how non-persistent joints affect the failure mechanisms of notched rock from a practical perspective.

Highlights

• Covers failure behavior of non-persistent joint under different loading conditions Explains failure mode, Failure pattern and Failure coalescence of rock bridges Introduces acoustic emission hits during crack growth, Delay failure and instantaneous failure in rock bridge

Über den Autor

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.