Optimal Design Parameters of a Percussive Drilling System for Efficiency Improvement

<div>Damping mode capable of reaching maximum rock fracture displacement <i>u</i><sub><i>m</i></sub> given the piston-to-bit mass ratio <i>m</i><sub><i>r</i></sub> and <i>β</i>. 1: overdamped mode, 2: critically damped mode, 3: underdamped mode, 4: special underdamped mode.</div>

Advances in Materials Science and Engineering

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Figure 5

Figure 5: Optimal Design Parameters of a Percussive Drilling System for Efficiency Improvement 