Rock fragmentation under different installation polar angles of TBM disc cutters

Cheng, Yongliang; Zhong, Jue; Mei, Yongbing; Xia, Yimin

doi:10.1007/s11771-017-3642-2

Cited by 10 publications

(1 citation statement)

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“…In order to improve the service life of the TBM hob cutter ring in hard and highly abrasive formations, Jia Lianhui et al studied the influence of the alloy composition of the cutter ring and the type and state of the wear-resistant structure on the wear resistance, and formulated a new TBM cutter ring material [11]. Xia Yimin et al established a shield rock-breaking test bench and conducted a series of in-depth studies on the combined rock-breaking law and wear characteristics of the hob [12,13]. Cheng Yongliang studied the rock-breaking characteristics of the hob at different installation angles, the hob installation angle with higher rock breaking efficiency is obtained [14].…”

Section: Introductionmentioning

confidence: 99%

Research on rock breaking characteristics of impact hob of hard rock excavator

Lou¹,

Wang²,

Wu³

et al. 2023

J. vibroeng.

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During hard rock excavation in the process of tunnel construction, the hard rock excavator wears seriously and quickly and reduces its excavation efficiency. Aiming at this problem, this paper proposes a composite rock breaking method by impact rolling and cutting as a solution. In this paper, the composite rock breaking characteristics of impact hob are studied. The impact cutting load of the hob was analyzed, and the hobbing force equation and the rock crushing volume equation were established. The effects of different impact frequencies and impact loads on the cutting force and rock crushing characteristics of the hob were analyzed by experiments. The results show that under a certain thrust and hob spacing, with the increase of the impact frequency, the rock ridge between the two hobs gradually decreases, while the crushed volume of the rock increases gradually. Under the same axial load and cutter spacing conditions, with the increase of the impact frequency, the hob shear force decreases significantly. Under a certain axial load and impact frequency, with the increase of impact load, the crushing volume of rock and the hob shear force decrease significantly. These test results are of great significance for guiding the efficient excavation of hard rock tunnels.

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Section: Introductionmentioning

confidence: 99%