Modeling and performance analysis of rock drill drifters for rock stiffness

Oh, Joo-Young; Lee, Geun-Ho; Kang, Hak-Soon; Song, Chun‐Qing

doi:10.1007/s12541-012-0290-1

Cited by 40 publications

(23 citation statements)

References 7 publications

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“…When it strikes a shank adapter, impact force is produced. The shank adapter then transmits both the rotational and impact forces to an extension rod and finally to a drill bit, which drills holes in the rock and crushes rock fragments (Oh, 2012). Detailed specifications of the drifter are listed in Table 1.…”

Section: Structure and Operating Principle Of Rock-drill Driftermentioning

confidence: 99%

“…This is a device that is used to drill holes in rocks or ground (Oh et al, 2012). Some prior studies have been conducted to address the percussive drilling performance of the rock-drill.…”

Section: Introductionmentioning

confidence: 99%

“…The drifter of the rock-drill was modeled and its performance was analyzed by Oh et al (2011Oh et al ( , 2012. In these research studies, the percussion capability (depth, penetration rate, and kinetic energy) was evaluated with respect to the rock stiffness using a developed simulation model.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Evaluation of Percussion Performance for Rock-Drill Drifter

Seo

Park

Kim

et al. 2015

Journal of Biosystems Engineering

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Purpose: The objective of this study was to understand the operating mechanism of the rock-drill drifter, to explain how to setup an experimental test system and measure the strain of the drifter's rod, and to evaluate the drifter's performance with respect to the impact energy and blow frequency. Methods: The structure of the rock-drill drifter and its operating principle regarding the impact process were analyzed. Static calibration was carried out to calculate the correction factor using a drifter rod as the first step of the experimental test. The impact energy and blow frequency were then calculated based on strain measurements of the drifter's rod. Results: Experimental results showed that the tested drifter elicited a blow frequency of 3330 BPM (Blows Per Minute) and generated impact energy of 170 J/blow. This indicates that the drifter elicits a higher percussion speed and results in a lower impact energy compared to the hydraulic breaker at the same input power. Conclusions:The study proposed methodologies that deal with the experimental setup and the evaluation of the performance of the rock-drill drifter. These methodologies can be extensively used for validating and improving the percussion performance of the drilling equipment.

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Section: Structure and Operating Principle Of Rock-drill Driftermentioning

confidence: 99%

“…This is a device that is used to drill holes in rocks or ground (Oh et al, 2012). Some prior studies have been conducted to address the percussive drilling performance of the rock-drill.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental Evaluation of Percussion Performance for Rock-Drill Drifter

Seo

Park

Kim

et al. 2015

Journal of Biosystems Engineering

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“…Due to this, alternative methods must be utilised when performing coupled simulations for fluid power machinery developed by the general machine building industry. The fluid system of hydraulic percussion units can be simulated using 1D system simulation tools, where the structural parts are incorporated as 1D rigid bodies, to include the fluid-structure couplings [3,4]. This method is based on sub-components that are described by different types of equations, e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Giuffrida et al [3] and Ficarella et al [7][8][9] defined a 1D system simulation model of a hydraulic hammer using the simulation tool Amesim [10] for simulating the responses for the coupled fluid-structure system. In the work by Oh et al [4] a hydraulic rock drill was simulated using the same methodology as Giuffrida et al and Ficarella et al Their approach to use 1D rigid bodies for the structural components and 1D fluid components, e.g. cavities, orifices etc., and the formulation of these components cannot handle internal wave propagation, since they only has one degree of freedom, and hence this mechanism is not represented in their simulation results.…”

mentioning

confidence: 99%

A Co-Simulation Approach for Hydraulic Percussion Units

Andersson¹

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Effects of Working Angle on Pneumatic Down-the-hole Hammer Drilling

Zhao

Meng

et al. 2014

Rock Mech Rock Eng

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The effects of the working angle on pneumatic down-the-hole (DTH) hammer drilling was investigated since these hammers were developed for vertical drilling and their performances in inclined positions need to be tested. The investigation begins by establishing a calculation model with which to simulate the percussive drilling of the hammer. The model consists of two parts. The first gives the kinetic energy of the piston at impact by simulating the thermodynamic cycle of the DTH hammer, and the second simulates the percussive drilling process according to the analyses of stress-wave propagation. In the meantime, a laboratory-scale test device was made for multi-angle hammer drilling tests. This device is based on a small pneumatic DTH hammer used in deep well drilling. By analyzing the force acting on the rock during impact at different angles, the percussive drilling process is carefully examined. Theoretical predictions and experimental results appear in fairly good agreement. The hammer's working performance in inclined positions can be obtained directly using the proposed model. Furthermore, when detailed evaluation is required, the hammer can be tested using the method proposed in this paper.

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Modeling and performance analysis of rock drill drifters for rock stiffness

Cited by 40 publications

References 7 publications

Experimental Evaluation of Percussion Performance for Rock-Drill Drifter

Experimental Evaluation of Percussion Performance for Rock-Drill Drifter

A Co-Simulation Approach for Hydraulic Percussion Units

Effects of Working Angle on Pneumatic Down-the-hole Hammer Drilling

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