Numerical investigation of TBM disc cutter cutting on microwave-treated basalt with an unrelieved model

被引:0
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作者
Chun Yang
Ferri Hassani
Keping Zhou
Quan Zhang
Famin Wang
Feng Gao
Ameen Topa
机构
[1] Central South University,School of Resources and Safety Engineering
[2] McGill University,Department of Mining and Materials Engineering
[3] Central South University,Research Center for Mining Engineering and Technology in Cold Regions
[4] China University of Mining and Technology,School of Mines
[5] State Key Laboratory of Shield Machine and Boring Technology,Institute of Transportation Infrastructure
[6] Universiti Teknologi PETRONAS,Department of Maritime Technology
[7] University Malaysia Terengganu,School of Mines
[8] China University of Mining and Technology,undefined
来源
Archives of Civil and Mechanical Engineering | / 22卷
关键词
TBM excavation; Microwave-assisted rock breakage; Numerical simulation; Unrelieved rock model;
D O I
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中图分类号
学科分类号
摘要
Cutter wear or damage is a significant issue during tunnel boring machine (TBM) tunneling in hard rock. Microwave preconditioning has been verified as a promising approach to reduce cutter wear and enhance the TBM excavation efficiency. Thus, understanding the TBM cutting performance for microwave-treated hard rock is necessary. First, numerical verification of a cutting model was performed to examine the universality and reliability of the model. Then, the rock mechanical parameters of microwave-treated basalt were calibrated using linear Mohr–Coulomb theory. Finally, linear cutting simulations were conducted with an unrelieved rock model by considering the variables of the disc cutter penetration depth and microwave irradiation conditions. The numerical results indicated that the maximum reduction in the rolling and normal forces reached 38.38% and 44.95% (under a 5-kW microwave power and 3-mm penetration depth), respectively. A novel indicator of the linear friction energy was proposed to assess disc cutter wear, and the maximum reduction reached 36.81% under a microwave power of 5 kW and penetration depth of 4 mm. Considering the microwave weakening efficiency, TBM tunneling efficiency and cutter wear, microwave parameters including a high microwave power and short irradiation time were suggested for future practice.
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