“RESPONSE SOUND PRESSURE PULSE INCLINATION METHOD” AS A QUANTITATIVE INDEX FOR ROCK MASS CLASSIFICATION

Abstract

One of the indices for rock mass classification deals with “judgment method by the hammer tapping”. It has been based on qualitative evaluation rather than the quantitative one. In the course of our study, it was observed that the quantitative evaluation of the properties of rock is established by analyzing the vibration of the tapping sound wave obtained from measurements by a microphone. From the analysis results of the fundamental experiments (using the artificial rock), we propose an approach, “response sound pressure pulse inclination”, as one of the quantitative evaluation indices for rock classification.