Effect of bolt configuration on the interface behaviour between a rock bolt and bond material : a comprehensive DDA investigation

• Main Authors: Yokota, Yasuhiro, Zhao, Zhiye, Shang, Junlong, Nie, Wen, Date, Kensuke, Iwano, Keita, Okada, Yuko
• Other Authors: School of Civil and Environmental Engineering
• Format: Article
• Language: English
• Published: 2021
• Subjects: Engineering::Civil engineering; Rock Bolt Modelling; Direct Shear
• Online Access: https://hdl.handle.net/10356/150738
• Institution: Nanyang Technological University

The role of rock bolts has become more important for a tunnel/cavern construction because of the wide use of conventional tunnelling methods under severe conditions. However, there is a lack of understanding on the interface behaviour between a rock bolt and bond material, especially on the crack initiation and propagation. The purpose of this paper is to investigate the effect of bolt configurations on the bolt-grout interface behaviour by discontinuous deformation analysis. By assessing the impact of key parameters, we can better understand the recommended parameter values and their impacts on the failure mechanism.