Experimental Evaluation of Percussion Performance for Rock-Drill Drifter

다국어 초록 (Multilingual Abstract)

Purpose: The objective of this study was to understand the operating mechanism of the rock-drill drifter, to explain how tosetup an experimental test system and measure the strain of the drifter’s rod, and to evaluate the drifter’s performance withrespect to the impact energy and blow frequency. Methods: The structure of the rock-drill drifter and its operating principleregarding the impact process were analyzed. Static calibration was carried out to calculate the correction factor using adrifter rod as the first step of the experimental test. The impact energy and blow frequency were then calculated based onstrain measurements of the drifter’s rod. Results: Experimental results showed that the tested drifter elicited a blowfrequency of 3330 BPM (Blows Per Minute) and generated impact energy of 170 J/blow. This indicates that the drifter elicitsa 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 performanceof the rock-drill drifter. These methodologies can be extensively used for validating and improving the percussion performanceof the drilling equipment.

참고문헌 (Reference)

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