Experimental and numerical study of a new resonance hammer drilling model with drift

New drilling techniques have been studied to increase the penetration in hard rock formations. These techniques use harmonic loads and, in some cases, also impacts to generate a greater penetration rate. Analyzing only a percussive penetration phenomenon, the new model presented in this paper allows the forward motion (with a drift) in stick–slip condition with and without impact. Numerical and experimental investigations are presented and are qualitatively and quantitatively compared. Otherwise looking for other parameter ranges in the simulation, it is shown that the behavior may vary from periodic to chaotic motion. From the engineering side, the main interest in a study like that in this paper is if the rate of penetration can be improved. The simulation may help a lot in that, and in a short conclusion one should look for regions with period-1 behavior.