With the purpose to investigate the influence of joint dip angle and spacing on the TBM rock-
breaking efficacy and cracking behaviour, experiments that include miniature cutter head …

Studying the damage evolution law of rock with directional bedding structure during the
rolling cutter rock-breaking process under high confining pressure is of great significance …

Extensive and detailed investigations have been made to better understand the rock-
breaking mechanism of the tunnel boring machine (TBM) disc cutter, but the crack …

The characteristics of joints are crucial factors which influence the penetration efficiency of
tunnel boring machine (TBM). Based on the theoretical study, numerical simulation and …

Abstract The Inserted-tooth Hob has been widely used in underground engineering when
the mechanical rock drilling direction downward. Based on the mechanical parameters of …

Tunnel boring machines' construction efficiency is significantly affected by the formation of
joints. Indentation tests were performed to explore the influence of joints on rock …

Partial wear is one of the fatal abnormal wears, which may pose a threat to the cutterhead or
even the driving system. Considering the randomness of partial wear, the real-time detection …

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 …

In this paper, the influences of joint angle and joint spacing on the rock fragmentation have
been investigated using Particle Flow Code in two dimensions (PFC2D). Firstly calibration of …

This paper presents the results of laboratory investigation and numerical study on rock
breakage by disc cutter under coupled static and dynamic loads. The test results suggested …