The rock breaking mechanism analysis of axial ultra-high frequency vibration assisted drilling by single PDC cutter

Zhao, Yan; Zhang, Congshan; Zhang, Zengzeng; Gao, Ke; Li, Jiasheng; Xie, Xu

doi:10.1016/j.petrol.2021.108859

Cited by 30 publications

(10 citation statements)

References 30 publications

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“…Menezes [16] used LS-DYNA software to study the effects of friction, cutting speed and front angle on cutting force and the formation of discontinuous rock fragments during rock cutting predicted the separation of rock fragments from rock slabs and found that the front angle had a significant effect on the cutting force and fragment morphology during rock cutting. Zhao et al [17] established a finite element model of the dynamic rock-breaking process and analysed the cutting force, fracture efficiency and crack extension process, and found that the mechanical specific energy and cutting force reached the minimum value when the excitation frequency was close to the inherent frequency of the rock, and the axial ultra-high frequency vibration (UHFV)-assisted drilling could effectively improve the rock-breaking efficiency by adjusting the magnitude of the excitation frequency.…”

Section: Introductionmentioning

confidence: 99%

Optimization of roller teeth based on the analysis of the crushing mechanism of sintered ore

Dai¹,

Tang

Jiang³

et al. 2023

Ironmaking & Steelmaking

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In this paper, relevant mechanical tests were conducted on sintered ore specimens, and found that the ultimate strength of sintered ore under different strain rates had significant differences. The JH-2 constitutive model of sintered ore was obtained based on relevant tests and theoretical derivation, and used finite element method to reveal the crushing mechanism of sintered ore, and found that the maximum stress was mainly concentrated near the tooth root and tooth tip. By analyzing the variation rate of the fitted nonlinear surfaces about the stress of the tooth root and tooth tip versus the width of the tooth root and tooth tip and considering the engineering reality, it was found that the best choice of the roll tooth parameters was found when the tooth tip and root widths were both 160 mm.

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Section: Introductionmentioning

confidence: 99%

Optimization of roller teeth based on the analysis of the crushing mechanism of sintered ore

Dai¹,

Tang

Jiang³

et al. 2023

Ironmaking & Steelmaking

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“…Zhang et al (2022b) considered the combination of impact action and cutting action, and studied cutting characteristics of the impact pick by combining theoretical analysis, numerical simulation and an experiment. Zhao et al (2021) proposed a finite element numerical modeling method for a dynamic cutting process under different ultra-high pressure loads. The cutting force, mechanical specific energy (MSE), rock failure mode and crack propagation process of heterogeneous rock with natural cracks were analyzed and compared with cutting conditions under a steady load.…”

Section: Introductionmentioning

confidence: 99%

Analysis of dynamic characteristics of an experimental bench of high-pressure water fracturing assisted cutting

Liu¹,

Zhang²,

Sun³

et al. 2023

Journal of Theoretical and Applied Mechanics

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Aiming at the problem that the cutting efficiency of a drum shearer is low when mining hard coal seams, an experimental bench of high-pressure water fracturing assisted cutting is designed. Compared with normal ones, the maximum equivalent stress of the improved experimental bench is reduced by 55.38%, and the maximum total deformation is reduced by 27.23%. According to the results of dynamic response analysis, it is concluded that the experimental bench of high-pressure water fracturing assisted cutting is stable and reliable under extreme working conditions, and meets design requirements for strength and stiffness.

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“…With the depletion of shallow underground resources, the depth of mining has been continuously increasing, making mining conditions increasingly complex [1,2]. Therefore, it is necessary to develop new technologies and tools for deep rock breaking [3].…”

Section: Introductionmentioning

confidence: 99%

Investigating the Vibration assisted rock drilling in longitudinal-torsional direction

Gao¹,

Lin²,

Li³

et al. 2023

Preprint

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To address the issues of high axial force and slow cutting speed in traditional rock drilling, this paper proposes a longitudinal-torsional coupled vibration assisted rock drilling scheme. Theoretical modeling of rock drilling under longitudinal-torsional coupled vibration assistance is presented, followed by finite element simulations of traditional drilling, longitudinal vibration drilling, torsional vibration drilling, and longitudinal-torsional coupled vibration drilling. Results show that longitudinal-torsional coupled vibration drilling reduces the maximum axial force by 36.32% and increases the drilling speed by 36.28% compared to traditional drilling. Experimental validation shows a reduction in strain of the drill bit support by 35.48% and a 31.25% increase in drilling speed during longitudinal-torsional coupled vibration drilling compared to torsional vibration drilling. Study demonstrates that longitudinal-torsional coupled vibration drilling is a more efficient method for rock drilling than other methods.

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The rock breaking mechanism analysis of axial ultra-high frequency vibration assisted drilling by single PDC cutter

Cited by 30 publications

References 30 publications

Optimization of roller teeth based on the analysis of the crushing mechanism of sintered ore

Optimization of roller teeth based on the analysis of the crushing mechanism of sintered ore

Analysis of dynamic characteristics of an experimental bench of high-pressure water fracturing assisted cutting

Investigating the Vibration assisted rock drilling in longitudinal-torsional direction

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