A Case Study of Cutting Performance by a Transverse Cutting Head Based on Three-Dimensional Particle Flow Model

Zhang, Kangjian; Liu, Zheng; Zhang, Zhiqiang

doi:10.1007/s12205-023-1683-7

Cited by 2 publications

(1 citation statement)

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“…During the model generation process, different macroscopic physical and mechanical properties can be simulated by adjusting the properties and arrangement of particles. The contact behavior between particles determines the expression of the model's macroscopic mechanical properties [25]. Figure 7 illustrates the bonded-particle model (BPM) [26].…”

Section: Particle Flow Modelmentioning

confidence: 99%

Research on Rock-Breaking Characteristics of Cutters and Matching of Cutter Spacing and Penetration for Tunnel Boring Machine

Zhang,

Xia,

Huang

et al. 2024

Buildings

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Tunnel boring machine (TBM) tunnel construction in composite strata relies heavily on understanding the rock-breaking characteristics of TBM cutters and optimizing cutter spacing and penetration. Utilizing a full-scale rock rotary cutting machine (RCM), this study conducted rock-breaking tests with disc cutters under varying rolling radii. An analysis of rock debris shape and cutter behavior provided insights into rock-breaking mechanisms. Two main types of rock fragments were identified, with both shear and compression failure observed during cutter–rock interactions. The influence of the rolling radius and cutter spacing on cutter forces was analyzed, along with numerical modeling using the particle flow method. Optimal cutter selection in soft–hard composite strata should prioritize cutter force, with the greatest force required in hard rock. Cutter force increases with penetration, while the force difference between cutters decreases with reduced cutter spacing. These findings offer practical guidance for efficient rock-breaking in composite geological formations during tunnel construction.

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Section: Particle Flow Modelmentioning

confidence: 99%