Determining geomechanical characteristics of rocks plays a significant role in all consequent designing stages of geosciences. On the other hand, drilling is one of the considerable operations in the primary phases of extracting rocks. The drilling process produces acoustic signals as a by-product of drilling. Hence, one possible way for predicting geomechanical properties of rocks is by employing acoustic signal frequencies, which are produced during drilling. This process helps geoengineers determine rock characteristics in a short time with low-cost and satisfying precision. This research tries to develop some novel computational relations between geomechanical characteristics of sedimentary rocks and the produced dominant acoustic frequencies by implementing Fast Fourier Transform (FFT). For this purpose, a novel rotary drilling machine was developed by researchers. In order to introduce a reliable model, 10 diverse sedimentary rock samples from various sedimentary basins of Iran were gathered in a wide range of geomechanical features, and all tests were carried out on them. The results of this research could be used for sedimentary basins’ characterization. The results show that there are reliable mathematical relations between various characteristics of sedimentary rocks (Uniaxial Compressive Strength (UCS), Tensile Strength (TS), porosity and hardness) and diverse dominant frequencies.
