Effect of Penetration Rate on Linear Cutting of Composite Rock Masses byTBM Disc Cutters
[1]ZHAI Shufang,TIAN Boning,CHANG Lianyuan,et al.Effect of Penetration Rate on Linear Cutting of Composite Rock Masses byTBM Disc Cutters[J].Journal of Zhengzhou University (Engineering Science),2027,48(XX):1-7.[doi:10.13705/j.issn.1671-6833.2026.06.006]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
48
Number of periods:
2027 XX
Page number:
1-7
Column:
Public date:
2027-12-10
- Title:
- Effect of Penetration Rate on Linear Cutting of Composite Rock Masses byTBM Disc Cutters
- Keywords:
- TBM; Composite rock mass; Disc cutter; Penetration depth; particle flow numerical simulation
- CLC:
- U455
- Abstract:
- Composite strata are a type of adverse geological structure, and Tunnel Boring Machines often face significant cutterhead vibrations and tool wear during excavation in such strata. In order to increase the TBM tunnelingrate in composite strata, it is necessary to study the influence of the TBM cutter penetration depth in the rock breaking process. This study investigated the effect of roller cutter penetration on the rock-breaking force, rock-breakingefficiency, crack propagation depth, and failure modes of cutters in composite rock masses through discrete elementnumerical simulations. Moreover, the linear cutting experiment of the roller was conducted for verification and analysis. The main conclusions drawn from the study are as follows: ① At a penetration depth of 2. 0 mm, the specificenergy of the composite rock mass is minimal, and the roller cutter,s rock-breaking efficiency is the highest. ②With the increase in penetration, the crack propagation depth increases in both granite and bluish sandstone. Whenthe penetration is greater than 1. 0 mm, the crack depth in sandstone is greater than that in granite. ③At differentpenetration depths, the crack failure mode in granite is predominantly tensile failure, while in sandstone, shearfailure predominates at low penetration depths. However, as the penetration increases, tensile failure becomes thedominant mode. The numerical simulation results extend the qualitative analysis of crack propagation depth and failure modes from the laboratory experiments to quantitative calculations, which is of significant importance for the setting of TBM roller cutter operating parameters in composite strata.
- References:
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Last Update:
2026-06-03
