P and S wave velocity of rocks in Jharia coalfield region for assessment of its geotechnical properties in dry, semi-saturated and saturated conditions

P-wave and S-wave velocity of the rock samples (Shale, Sandstone, Coal and Shaley sandstone) were determined in the laboratory in dry, saturated and partially saturated condition to determine the geotechnical rock properties of rock samples. The aim of this study was to predict the rock properties such as uniaxial compressive strength, tensile strength, and S wave from P-wave in dry, Semi saturated and Saturated condition. Highest values of P-wave velocities were obtained in a saturated condition and lowest values were obtained in dry condition. Different geotechnical properties of rock were determined in the laboratory. Utilizing the generated data, sets of empirical equations were developed between P-wave and relevant quantified rock parameters. The validity of the obtained empirical equations was confirmed using statistical analysis. Linear equations have been developed in this paper for estimation S-wave velocity, Uniaxial compressive strength (UCS) and tensile strength in both dry, partially saturated and semi-saturated rock conditions.