Study on the breaking process of jointed rock mass by disc cutters based on digital image correlation and infrared thermography [PDF]
E3S Web of Conferences, 2021 Jointed rock masses are frequently encountered during the TBM excavation. To investigate the rock breakage mechanism of jointed rock mass by disc cutter and precursory information before rock failure, a series of indentation tests were performed on shear
Junning Xie, Bolong Liu, Nianchang Zeng
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Particle jet impact deep-rock in rotary drilling: Failure process and lab experiment.
PLoS ONE, 2021 Aimed at the technical problems of low drilling speed and difficult rock-breaking in deep-well and hard rock-stratum, particle waterjet coupled impact rock-breaking technology in rotary drilling is put forward in this paper.
Tiancheng Fang +4 more
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Rock Breaking Mechanism and Experimental Study of Axe-shaped PDC Cutter
Shiyou jixie, 2022 Axe-shaped PDC cutter has more obvious rock breaking advantage than conventional PDC cutter. In order to analyze the rock breaking mechanism of the axe-shaped PDC cutter, the finite element simulation and test were used to conduct comparison and force ...
Zou Deyong +3 more
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Numerical Simulation of Rock Breaking Mechanism for Compound Percussion Drilling
, 2019 : The ABAQUS dynamic impact module is used to establish the numerical calculation model for PDC single tooth-rock impact. The effects of PDC cutting teeth on the dynamic rock breaking mode and rock breaking effect under the combined action of rotating ...
Zhong, Su +4 more
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Gauge Symmetry Breaking in Gauge Theories---In Search of Clarification [PDF]
, 2011 The paper investigates the spontaneous breaking of gauge symmetries in gauge theories from a philosophical angle. Local gauge symmetry itself cannot break spontaneously in quantized gauge theories according to Elitzur's theorem---even though the notion ...
Friederich, Simon
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Rock-Breaking Mechanism of Special-shaped PDC Cutter in Heterogeneous Granite
Shiyou jixie, 2022 In order to clarify the rock-breaking mechanism of special-shaped PDC cutter in the difficult-to-drill formations(e.g. granite), the finite element method was used to establish a mesoscopic heterogeneous granite model with different mineral components ...
Liu Hexing +6 more
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Shiyou jixie, 2021 The research on rock breaking mechanism of special-shaped non-planar PDC cutter is relatively scarce, and the research on domestic prismatic PDC cutter is even scarcer.
Wei Xiuyan +5 more
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The rock cutting simulation of heterogeneous granite using FDEM method
PetroleumMany advanced rock breaking methods are emerged form improving the ROP in deep formation drilling in recent years, such as electric pulse rock breaking, ultrasonic rock breaking and hydraulic rock breaking.
Weiji Liu +4 more
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Numerical Simulation of Rotary Impact Rock-Breaking Process of a Full-Size Drill Bit
Shiyou jixie, 2023 As the key fundamental aspect of rotary impact drilling technology, the mechanism of rock breaking has not been well demonstrated, which limits the application of this technology.To illustrate the rotary impact rock-breaking process, the numerical ...
Yan Yan +5 more
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The rock breaking and ROP increase mechanisms for single-tooth torsional impact cutting using DEM
Petroleum Science, 2019 Torsional impact drilling is a new technology which has the advantages of high rock-breaking efficiency and a high rate of penetration (ROP). So far, there is no in-depth understanding of the rock-breaking mechanism for the ROP increase from torsional ...
Xiao-Hua Zhu, Yun-Xu Luo, Wei-ji Liu
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