Numerical simulation analysis on the drill bit rock breaking process based on ABAQUS

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (1) : 136-141.

ZHANG Qiang1,2,3,SUO Jiang-wei1,WANG Hai-jiang1,SUN Guo-qing1,SUNHe-wei1

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Abstract

In order to improve the rock breaking speed and efficiency, a dynamics simulation analysis was done by using the ABAQUS analysis software to study the process of continuously crushing hard rock under the rotary-impact load from a hydraulic drill. The effects of the impact frequency, rotary speed and initial crustal stress on the rock breaking efficiency were discussed. The numerical simulation analysis results show that: the rock breaking speed increase with the increase of rotary speed. When the rotary speed is up to 300r/min, the rock breaking speed is almost no longer changed and the rock breaking efficiency reaches the maximum. As the impact frequency increases, the rock breaking speed increases obviously, and at 70 Hz achieves the highest rock breaking efficiency. Different initial crustal stress conditions have little influence on the rock breaking speed, but it has a great impact on the efficiency of rock breaking. The results provide an important theoretical reference and numerical basis for improving the rock breaking effect of rock drills in practical engineering.

Key words

drill / ABAQUS / rotary speed / impact frequency / initial crustal stress / rock breaking efficiency / rock breaking speed

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ZHANG Qiang1,2,3,SUO Jiang-wei1,WANG Hai-jiang1,SUN Guo-qing1,SUNHe-wei1. Numerical simulation analysis on the drill bit rock breaking process based on ABAQUS[J]. Journal of Vibration and Shock, 2018, 37(1): 136-141

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