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Analysis of Rock Breaking Load Characteristics and Efficiency Optimization of Roller Cutters under Multi-Factor Coupling
In order to study the rock-breaking process of a 17-inch disc-type cutterhead in a full-face tunnel boring machine (TBM), we utilized the discrete element method software EDEM to analyze the in-fluence of relevant parameters (cutter spacing, penetration depth, installation radius, phase difference) on rock-breaking loads and efficiency. Firstly, validate the rationality of the discrete element model for the disc cutter rock-breaking process. Subsequently, establish a simulation of sequential rock-breaking with multiple rotating disc cutters and analyze the load characteristics as well as specific energy consumption. Simulation results indicate that within certain parameter ranges, an increase in cutter penetration depth leads to an increase in average load force, while an increase in cutter spacing and installation radius initially results in an increase in average load force followed by a decrease. An increase in phase difference results in an initial decrease in average load force followed by an increase. Based on orthogonal tests, a combination of rock-breaking parameters with values of 100 mm for cutter spacing, 8 mm for penetration depth, 650 mm for installation radius, and 45° for phase difference was found to yield lower specific energy consumption. This method can provide reference for cutter arrangement and cutterhead performance prediction.
Analysis of Rock Breaking Load Characteristics and Efficiency Optimization of Roller Cutters under Multi-Factor Coupling
In order to study the rock-breaking process of a 17-inch disc-type cutterhead in a full-face tunnel boring machine (TBM), we utilized the discrete element method software EDEM to analyze the in-fluence of relevant parameters (cutter spacing, penetration depth, installation radius, phase difference) on rock-breaking loads and efficiency. Firstly, validate the rationality of the discrete element model for the disc cutter rock-breaking process. Subsequently, establish a simulation of sequential rock-breaking with multiple rotating disc cutters and analyze the load characteristics as well as specific energy consumption. Simulation results indicate that within certain parameter ranges, an increase in cutter penetration depth leads to an increase in average load force, while an increase in cutter spacing and installation radius initially results in an increase in average load force followed by a decrease. An increase in phase difference results in an initial decrease in average load force followed by an increase. Based on orthogonal tests, a combination of rock-breaking parameters with values of 100 mm for cutter spacing, 8 mm for penetration depth, 650 mm for installation radius, and 45° for phase difference was found to yield lower specific energy consumption. This method can provide reference for cutter arrangement and cutterhead performance prediction.
Analysis of Rock Breaking Load Characteristics and Efficiency Optimization of Roller Cutters under Multi-Factor Coupling
KSCE J Civ Eng
Ling, Jingxiu (Autor:in) / Sun, Chao (Autor:in) / Wang, Qianting (Autor:in) / Zhang, Hao (Autor:in)
KSCE Journal of Civil Engineering ; 28 ; 4055-4066
01.09.2024
12 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Mechanical excavation of rock -- Experiments with roller cutters
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A Study on Isotropic Rock Breaking with TBM Cutters Under Different Confining Stresses
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A Study on Isotropic Rock Breaking with TBM Cutters Under Different Confining Stresses
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