Shahrood University of Technology Journal of Mining and Environment 2251-8592 16 1 2025 01 01 Failure Mechanisms of Concrete-Bolt Attachment Surface: Impact of Cable Bolt Indent Number and Shape 223 239 3235 10.22044/jme.2024.14440.2707 EN Vahab Sarfarazi Department of Mining Engineering, Hamedan University of Technology, Hamedan, Iran Lei Zhou State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, China State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China Hadi Haeri Department of Mining Engineering, Higher Education Complex of Zarand, Shahid Bahonar University of Kerman, Kerman, Iran. Parastou Salehipour School of natural resources and the environment, West Virginia University, Morgantown, West Virginia, USA Ali Elahi Department of Mining Engineering, Higher Education Complex of Zarand, Shahid Bahonar University of Kerman, Kerman, Iran. Ali Moayer Department of civil engineering, Islamic Azad University of Shiraz, Shiraz, Iran. Mohammad Fatehi Marji Department of Mine Exploitation Engineering, Faculty of Mining and metallurgy, Institute of Engineering, Yazd University, Yazd, Iran Journal Article 2024 04 18 The mechanical behavior of rock-rock bolt interface considering the effects of indents’ shape and their number was numerically simulated based on discrete element method using the two-dimensional particle flow code. The conventional and standard uniaxial compressive and Brazilian tensile strengths tests were used to calibrate the modelled samples with 100 cm 100 cm in dimension. The numerical models were prepared such that different indent shape and number were inserted in the cable bolts arrangements during the rock reinforcement process. The effects of confining pressure 3.7 MPa and different shear failure loads were modeled for the punch shear test of the concrete specimens. The results of this study showed that the dominant failure mode of the rock-cable bolt interface was of tensile mode and the shape and number of cable indents significantly affected the strength and mechanical behavior of the modelled samples. It has also been showed that the indent dimensions and number affected the shear strength of the interfaces. https://jme.shahroodut.ac.ir/article_3235_eb2199a328f338df7c1156457f474548.pdf