Abstract
Shotcrete is a key initial rock support component used in underground mining and civil projects. The strength of shotcrete plays a vital role in providing and deciding the support adequacy. The strength of shotcrete is evaluated by its uniaxial compressive strength (UCS) test that is usually conducted on extracted core samples. Shotcrete cores are commonly extracted from the test panels along the direction of its application; thus, its strength perpendicular to the direction of application is often neglected. The true bearing strength of shotcrete is thereby ignored despite the fact that higher stresses act normal to the direction of its application. Although the anisotropic behavior of shotcrete is well reported, no study has reported extensive testing of this scale and nature. This study reports extensive testing of shotcrete cores extracted from tunnels of a mega hydroelectric project in Pakistan. The study reports 7- and 28-days strength tests of shotcrete cores. The research also investigates the anisotropic behavior of steel fiber reinforced shotcrete and suggests that shotcrete exhibits higher strength perpendicular to the direction of its application.
Recommended Citation
M. U. Khan et al., "Investigating Strength Anisotropy Of Plain And Steel Fiber Reinforced Shotcrete," Mining Metallurgy and Exploration, vol. 40, no. 1, pp. 291 - 303, Springer, Feb 2023.
The definitive version is available at https://doi.org/10.1007/s42461-022-00715-9
Department(s)
Mining Engineering
Keywords and Phrases
Anisotropy; Fiber reinforced shotcrete, shotcrete; Tangential stresses; Tunneling; UCS
International Standard Serial Number (ISSN)
2524-3470; 2524-3462
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2025 Springer, All rights reserved.
Publication Date
01 Feb 2023
