Abstract
Rock cutting by tunnel boring machine (TBM) disc cutters is usually simplified as an indentation-type or linear-cutting process. It is inconsistent with the actual rock-breaking motion of disc cutters and therefore impedes to some extent the research on the rock-breaking mechanism, wear mechanism and design theory. In order to evaluate the kinematic law of points on cutter rings within the rock–cutter contact area (hereinafter referred to as rock-breaking points), the ring is divided into a series of infinitesimal circle-shaped cutting elements. Each of them could be determined by its coordinate position in the axial direction of the disc cutter. After that, according to the installation parameters of roller disc cutters mounted on the cutterhead and spatial geometric features of the cutters, the spatial kinematic model of any cutting element from a given cutter is proposed, and then the functional relationships between three-dimensional displacement components of the rock-breaking points and geometric parameters of the disc cutter are established. In order to demonstrate that the mentioned model has great application prospects in TBM industry, the cutting load prediction model of the disc cutter is derived from the kinematic model by introducing the linear spring model. Finally, by comparing with experimental data obtained from the rotary cutting tests, it can be seen that the prediction model built in this paper can better reflect the cutting load characteristics of TBM disc cutters with different installation parameters.
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The data used to support the findings of this study are available from the corresponding author upon request.
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Acknowledgements
This project is supported by the National Natural Science Foundation of China (Grant 51704256, 51804110, 51905550), the Science and Technology Innovation Program of Hunan Province (2021RC2094), Hunan Provincial Natural Science Foundation of China (Grant 2020JJ4583, 2017JJ3292) and Scientific Research Project of Hunan Education Department (Grant 19C1756).
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Zhang, K., Zhang, Y., Liu, J. et al. Research on Spatial Kinematics and Cutting Load Characteristics of TBM Disc Cutters. Geotech Geol Eng 41, 337–352 (2023). https://doi.org/10.1007/s10706-022-02285-5
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DOI: https://doi.org/10.1007/s10706-022-02285-5