Experimental research on the rotary rock-breaking effect of tunnel boring machine cutters assisted by microwave irradiation

IF 6.7 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology Pub Date : 2025-02-27 DOI:10.1016/j.tust.2025.106512

Gaoming Lu , Zhiyong Lu , Yongsheng Liu , Yangkai Zhang , Wenchao Fan

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引用次数: 0

Abstract

To deeply analyze the rock-breaking effect of tunnel boring machine (TBM) cutters assisted by microwave irradiation, rock-breaking experiments were conducted on microwave-irradiated rocks using reduced-scale TBM cutters. Influences of parameters including the microwave exposure time, microwave power, cutter spacing, same rolling distance (different rock-breaking depths), and penetration rate on rock-breaking marks, rock removal, wear loss of cutters, average cutter thrust, average cutterhead torque, and rock-breaking specific energy were explored. Research results show that under the same rotation diameter, increasing the microwave exposure time and microwave power decreases the wear loss of cutters, average cutter thrust, average cutterhead torque, and rock-breaking specific energy while increases the rock removal. If the cutter spacing is too large, the rock between adjacent cutting marks cannot be effectively exfoliated, the average cutter thrust and cutterhead torque enlarge, and the rock-breaking efficiency reduces. The wear loss of cutters is directly proportional to the rock-breaking depth. Under the current experimental conditions, using a large rock-breaking depth can exfoliate rock debris and improve the rock-breaking efficiency. A high penetration rate reduces the rotation number of the cutterhead, promotes the generation of rock debris, enlarges the rock removal, and improves the rock-breaking efficiency.

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来源期刊

Tunnelling and Underground Space Technology 工程技术-工程：土木

CiteScore

11.90

自引率

18.80%

发文量

454

审稿时长

10.8 months

期刊介绍： Tunnelling and Underground Space Technology is an international journal which publishes authoritative articles encompassing the development of innovative uses of underground space and the results of high quality research into improved, more cost-effective techniques for the planning, geo-investigation, design, construction, operation and maintenance of underground and earth-sheltered structures. The journal provides an effective vehicle for the improved worldwide exchange of information on developments in underground technology - and the experience gained from its use - and is strongly committed to publishing papers on the interdisciplinary aspects of creating, planning, and regulating underground space.