Analytical Research on the Wear Mechanism of TBM Disc Cutters Based on an Energy Approach

Geng, Qi

doi:10.3901/jme.2018.01.036

Cited by 6 publications

(4 citation statements)

References 4 publications

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“…He also pointed out that the work done by the kinetic energy and force of the disk cutter is theoretically equivalent to the breaking energy of rock mass and the damage energy during rock breaking. Geng [16] put forward the concepts of unit wear work and equivalent wear function of the disk cutter based on actual data. The regression analysis between wear data and friction work was carried out.…”

Section: Introductionmentioning

confidence: 99%

Disk cutter wear prediction of TBM considering sliding and rolling friction

Huang

Hao

et al. 2023

Materials Science-Poland

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Considering the serious wear of disk cutters in tunnel project and the low prediction accuracy of existing methods, a new method for wear prediction of disk cutters from an energy perspective was proposed. Based on contact mechanics, the rock breaking process of cutters was analyzed, and the combined action of sliding and rolling friction was considered. Furthermore, the wear prediction model of disk cutters was established, which realized the predicted wear of disk cutters under different geological conditions throughout the construction line. In addition, considering the influence of penetration on the wear prediction model, the predicted wear values under different penetrations were obtained, and their average values were taken as the predicted wear values of disk cutters considering penetration. Finally, the predicted wear values were compared with the actual wear value of disk cutters. The results showed that the average relative error between the predicted wear value of disk cutters considering sliding and rolling friction and the actual wear data was 12.8%. The average relative error between the predicted value of wear considering only sliding friction and the actual value of disk cutters is 18.3%. The average relative error between the predicted value of disk cutter wear considering penetration and the actual wear data was 12.2%, which proved the feasibility and accuracy of the prediction model. Meanwhile, it is more accurate than the model only considering sliding friction. The research results provided a scientific theoretical basis for the design of a tool change scheme in tunnel construction.

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Section: Introductionmentioning

confidence: 99%

Disk cutter wear prediction of TBM considering sliding and rolling friction

Huang

Hao

et al. 2023

Materials Science-Poland

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“…The disc hob, which is in direct contact with the rock and soil of the excavation face, is the core key component of TBM rock breaking, which is crucial to the rock breaking effect, boring speed and tool consumption. Exploring the wear law of TBM tools and developing high-efficiency hard rock excavation equipment has always been an important topic in the field of TBM [1][2][3].…”

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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“…with the TBM have been optimized [15,16]. The arrangement form of the disc cutters on the cutter head has been improved based on the interaction mechanism between the rock and the disc cutter being revealed further [17,18]. According to analyzing the failure mechanism of the disc disc cutter being revealed further [17,18].…”

Section: Introductionmentioning

confidence: 99%

“…The arrangement form of the disc cutters on the cutter head has been improved based on the interaction mechanism between the rock and the disc cutter being revealed further [17,18]. According to analyzing the failure mechanism of the disc disc cutter being revealed further [17,18]. According to analyzing the failure mechanism of the disc cutter, Lin [19] suggested to use new materials strengthened on the disc cutter to resist the rock wear.…”

Section: Introductionmentioning

confidence: 99%

Rock Breaking Performance of TBM Disc Cutter Assisted by High-Pressure Water Jet

Wang

Zhou

et al. 2020

Applied Sciences

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A high-pressure water jet can break rock efficiently, which is of great potential to overcome the problems of a tunnel boring machine (TBM) in full-face hard rock tunnel digging, such as low digging efficiency and high disc cutter wear rate. Therefore, this paper presented a new tunneling method that is a TBM coupled with a high-pressure water jet. The rock failure mechanism under the coupled forces of a disc cutter and water jet was analyzed at first. Then, the finite element method (FEM) and smoothed particle hydrodynamics (SPH) method were used to establish a numerical model of rock broken by the disc cutter and water jet. Effects of parameters on rock breaking performance were studied based on the numerical model. Moreover, an experiment of the water jet cutting marble was carried out to verify the reliability of the numerical simulation. Results showed that the high-pressure water jet can increase the TBM digging efficiency and decrease the forces and wear rate of the disc cutter. The optimum nozzle diameter is 1.5 mm, while the optimum jet velocity is 224.5 m/s in this simulation. The results can provide theoretical guidance and data support for designing the most efficient system of a TBM with a water jet for digging a full-face hard rock tunnel.

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Analytical Research on the Wear Mechanism of TBM Disc Cutters Based on an Energy Approach

Cited by 6 publications

References 4 publications

Disk cutter wear prediction of TBM considering sliding and rolling friction

Disk cutter wear prediction of TBM considering sliding and rolling friction

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

Rock Breaking Performance of TBM Disc Cutter Assisted by High-Pressure Water Jet

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