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This open access book provides a detailed exploration of how dynamic disturbances, such as those caused by blasting or seismic activity, affect the damage and failure mechanisms of rocks. When excavation is carried out under high stress environment, the external disturbance will change the stress field of the rock, which may lead to potential engineering damage such as large deformation and large displacement of the free surfaces of the engineering surrounding rock, and even cause instability damage, rockburst, and other engineering disasters. From 1960s onward, the subject of progressive damage and failure of rock materials has been extensively investigated to prevent and control geological disasters and engineering accidents. However, the existing researches usually did not take the effects of low-frequency dynamic disturbances on the mechanical properties of rock into consideration. Rock mechanics researchers, such as graduate students, doctoral students, or academics, need to understand the complex interactions between dynamic disturbances and rock integrity. They require up-to-date knowledge of the latest research findings and models to predict rock behaviors accurately.
Sommario
Introduction.- Modifications to Rock Triaxial Test System for Dynamic Disturbance.- Description of Rock Samples and Their Basic Physical and Mechanical Properties.- Experimental Study on the Influence of Dynamic Disturbance on Progressive Damage and Failure of Rock.- Effect of Confining Pressure on Damage Evolution and Failure Behaviors of Intact Sandstone Samples during Cyclic Dynamic Disturbance.- Mechanism of Damage and Failure of Rock Triggered by Cyclic Dynamic Disturbance.- Numerical Model of Progressive Damage and Failure of Rock Triggered by Cyclic Dynamic Disturbance.- Concluding Remarks and Prospects.
Info autore
Dr. Chen Xu was born in August 1988. In October 2019, he got Mining Engineering of Doctor’s degree in Northeastern University, China. From May 2020, he commenced his career in Chengdu University of Technology as a full-time lecture. From December 2022, he has been promoted as an assistant professor. In March 2023, he was elected as a full research staff of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection. In the past five years, he was the young Principal Investigator of several key scientific projects. His current research interests focus on damage and failure of rock triggered by cyclic dynamic disturbance, permeability evolution and progressive damage of rock, and deep underground rock mass. Throughout his career, he has published more than 30 papers in prestigious journals, in which more than 20 English papers (indexed by SCI) were published in Rock Mechanics and Rock Engineering, Landslides, Construction and Building Materials.
Riassunto
This open access book provides a detailed exploration of how dynamic disturbances, such as those caused by blasting or seismic activity, affect the damage and failure mechanisms of rocks. When excavation is carried out under high stress environment, the external disturbance will change the stress field of the rock, which may lead to potential engineering damage such as large deformation and large displacement of the free surfaces of the engineering surrounding rock, and even cause instability damage, rockburst, and other engineering disasters. From 1960s onward, the subject of progressive damage and failure of rock materials has been extensively investigated to prevent and control geological disasters and engineering accidents. However, the existing researches usually did not take the effects of low-frequency dynamic disturbances on the mechanical properties of rock into consideration. Rock mechanics researchers, such as graduate students, doctoral students, or academics, need to understand the complex interactions between dynamic disturbances and rock integrity. They require up-to-date knowledge of the latest research findings and models to predict rock behaviors accurately.
