Simulation Study of Rock-breaking Efficiency of Microwave-assisted TBM Disc cutters

Journal: Architecture Engineering and Science DOI: 10.32629/aes.v5i3.2800

Lin Du, Sen Wen

School of Civil and Architecture Engineering, Henan University, Kaifeng 475004, Henan, China

Abstract

The research through the establishment of microwave-assisted disc cutter rock-breaking discrete element model, from the perspective of rock-breaking specific energy to analyze the change rule of disc cutter rock-breaking efficiency before and after microwave radiation. The results show that: in the cutter spacing 180mm range, the rock-breaking specific energy before and after microwave radiation with the increase of the cutter spacing show a “first decrease and then increase” trend, when the cutter spacing 90mm, to reach the minimum rock-breaking specific energy; through the comparison, the microwave radiation to improve the rock-breaking efficiency of the disc cutter is effective, it is recommended to choose the spacing of 150mm waveguide and disc cutter for joint rock-breaking.

Keywords

microwave-assisted rock-breaking; disc cutters; discrete element; specific energy

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