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Study on Microwave-assisted TBM Double-edged Cutter Rock-breaking Efficiency and its Positional Relationship
Lin Du 1
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School of Civil and Architecture Engineering, Henan University, China
Submission date: 2023-12-10
Final revision date: 2023-12-29
Acceptance date: 2024-03-24
Online publication date: 2024-04-05
Publication date: 2024-04-05
Corresponding author
Qingmei Kong   

School of Civil and Architecture Engineering, Henan University, 475004, Kaifeng, China
Eksploatacja i Niezawodność – Maintenance and Reliability 2024;26(2):186447
  • Establishing a microwave-assisted TBM double-edged cutter rock-breaking model based on the discrete element method, and exploring the crack propagation mechanism.
  • Exploring the positional relationship between microwave waveguides and disc cutters, and proposing the optimal rock-breaking combination mode, further improving the microwave-assisted disc cutter rock-breaking mechanism.
In this study, based on a microwave test, the discrete element program (PFC) is used to establish a microwave-assisted disc cutter rock-breaking model and explore the influence law of the positional relationship between microwave radiation and disc cutter penetration on rock-breaking efficiency, and the results show that: The improvement of the positional relationship has a significant effect on improving the rock-breaking efficiency, and the double-edged cutter reaches and minimum rock-breaking specific energy when breaking the rock in the center position with a waveguide spacing of 90 mm and in the inner and outer positions with a waveguide spacing of 150 mm; When the waveguide spacing is 150mm, the double-edged cutter with cutter spacing of 110mm, 130mm, and 190mm have their advantages in rock-breaking efficiency and economic benefits, which should be selected according to the actual needs of the project. The follow-up research should also fully consider the rock type, microwave parameters, cutter profile, engineering environment, and other factors for in-depth investigation.
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