Gao, C., Huang, Y. ., Geng, Q., Han, X. ., Zhang, H. ., Hu, R. ., & Liu, F. (2024). Study on the influence of TBM disc cutter on the penetration of extremely hard rock in Zijing Tunnel. Electronic Journal of Structural Engineering, 24(2), 30–37. https://doi.org/10.56748/ejse.24626