A 3D FEM Methodology for Rock Breakage in Rotary-Percussive Drilling

Xiao, Xiaohua; Zhu, Haiyan; Liu, Qingyou; Fan, Yihang; Degui, Wang; Chen, Bo

doi:10.1109/iccis.2010.35

Cited by 6 publications

(8 citation statements)

References 6 publications

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“…The force-penetration curve is generally defined by one [ 8 ] or two strain gauges [ 7 , 9 ] mounted at sections far from the impact region. The interaction between the drill bit and the worked material has also been modeled with lumped parameters modeling three-dimensional finite element methods [ 10 , 11 , 12 , 13 , 14 ]. The available studies provide useful information about the resistance during the impact and the efficiency of the energy transfer [ 15 , 16 ], but do not consider the drill bit rotation and the matching between axial and torsional vibrations, i.e., the chatter vibration phenomenon [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Measurement of Stress Waves Propagation in Percussive Drilling

Scaccabarozzi¹,

Saggin²

2021

Sensors

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This work describes the results of a test campaign aimed to measure the propagation of longitudinal, torsional, and flexural stress waves on a drill bit during percussive rock drilling. Although the stress wave propagation during percussive drilling has been extensively modeled and studied in the literature, its experimental characterization is poorly documented and generally limited to the detection of the longitudinal stress waves. The activity was performed under continuous drilling while varying three parameters, the type of concrete, the operator feeding force, and the drilling hammer rotational speed. It was found that axial stress wave frequencies and spectral amplitudes depend on the investigated parameters. Moreover, a relevant coupling between axial and torsional vibrations was evidenced, while negligible contribution was found from the bending modes. A finite element model of the drill bit and percussive element was developed to simulate the impact and the coupling between axial and torsional vibrations. A strong correlation was found between computed and measured axial stress spectra, but additional studies are required to achieve a satisfactory agreement between the measured and the simulated torque vibrations.

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Section: Introductionmentioning

confidence: 99%

Measurement of Stress Waves Propagation in Percussive Drilling

Scaccabarozzi¹,

Saggin²

2021

Sensors

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“…They recommended a small lateral movement and reasonable axial vibration frequency to achieve energetically efficient rock fracturing. Xiaohua et al [11] researched the rock-breaking mechanism and concluded that volume breaking was caused by the torsional shear stress. It was then further accelerated together with crack extension by the tensile shear stress, and the compressive stress was identified as a secondary factor for the rock breaking.…”

Section: Introductionmentioning

confidence: 99%

“…In their article, the breaking mechanism of soft and hard rock, as well as the rock damage by the rotary-percussive and conventional methods, are shown. A three-dimensional finite element model was also presented by Xiaohua et al [11] and was created to investigate the rock-breaking mechanism of the rotary-percussive drilling method considering the simultaneous influence of the static pressure, the force of impact, and the bit rotation. As a result of the field tests, they concluded the usefulness of the 3D FEM model created and defined preferred angles for the bit depending on its inserts.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Old Exploration Boreholes in the Lublin Basin with Regard to Potential Rotary-Percussion Drilling of Shale Gas Wells

et al. 2021

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The rotary-percussion drilling method is a prospective way to decrease drilling costs. It is obvious, based on literature analyses and finished geothermal drilling, that the Lublin Basin can be perceived as the one where rotary-percussion drilling can be used to drill an overburden of shale rocks. The paper explained the geology of the Lublin Basin, its’ geological structures, and the possibility of the use of drilling with a down-the-hole hammer, which could significantly decrease the cost of the whole shale gas drilling investment. Data collected from the wells drilled in the Lublin Basin were compared and analyzed to determine the viability of rotary-percussion drilling. Provided analyses showed that using the rotary-percussion drilling method in the Lublin Basin had a greater possibility of application than in other Polish shale basins (Baltic and Podlasie).

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“…There are three main methods for the simulation of rock fragmentation: finite element method (FEM), discrete element method (DEM) and a coupled FEM-DEM method. In the simulation of the finite element method, most of the simulations were performed using LS-DYNA software [13]- [17]. Li and Shi [18] proposed a dynamic material model for expressing the mechanical behavior of a rock material under high confining pressure and high strain rate.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Method for Prediction of Rock Breaking Performance of the Tipped Hob With Different Tooth Profiles

Jiang

2020

IEEE Access

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The raise boring machine, which plays a crucial role in wellbore construction, has been widely applied in subway tunnels and mine construction projects. High levels of quality and safety, make it recognized and promoted by an increasing number of users. The tipped hob as a rock-breaking cutter of the raise boring machine poses a direct influence on the efficiency of the well-bore construction. In this paper, the finite element software LS-DYNA is employed to establish the model of the crushed rock with the tipped hob, and the accuracy of the model is examined by experiments. On this basis, the variation laws and correlations of feed force, lateral force and positive force under different penetration depths are studied. The results show that as the penetration depth increases, the feed force, lateral force and positive force all grow exponentially. In the geological environment with high rock hardness, spherical tooth can effectively reduce cutter wear and conical tooth can achieve higher crushing ability. The research results provide a theoretical basis for the selection of a suitable tipped hob to improve rock breaking efficiency. INDEX TERMS Raise boring machine, rock breaking, tooth profile, tipped hob, numerical simulation.

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A 3D FEM Methodology for Rock Breakage in Rotary-Percussive Drilling

Cited by 6 publications

References 6 publications

Measurement of Stress Waves Propagation in Percussive Drilling

Measurement of Stress Waves Propagation in Percussive Drilling

Investigation of Old Exploration Boreholes in the Lublin Basin with Regard to Potential Rotary-Percussion Drilling of Shale Gas Wells

Finite Element Method for Prediction of Rock Breaking Performance of the Tipped Hob With Different Tooth Profiles

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