Fragmentation characteristics of stressed rock with weak interlayers using double TBM cutters

• Published in: Engineering fracture mechanics Vol. 315; p. 110845
• Main Authors: Yang, Zheng, Tao, Ming, Yin, Tubing, Luo, Hao, Chen, Chao, Ranjith, P.G.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 21.02.2025
• Subjects: Cutter spacing; Discrete element method; Initial stress; Rock breaking; Tunnel boring machine; Weak interlayer; Rock breaking; Initial stress; Tunnel boring machine; Discrete element method; Cutter spacing; Weak interlayer

•A model for stressed hard rock breakage containing weak interlayers is proposed.•The increase in initial stress inhibits the expansion of the median crack.•The presence of the weak interlayer leads to an asymmetry in the stress field.•The prediction equation for rock-breaking efficiency is establis...