Experimental Investigation on the Correlation between Dynamic Ultrasonic and Mechanical Properties of Sandstone Subjected to Uniaxial Compression

Ultrasonic wave velocity is effective to evaluate anisotropy property and predict rock failure. This paper investigates the correlation between dynamic ultrasonic mechanical properties of sandstones with different buried depths subjected uniaxial compression tests. The circumferential axial sandstone are obtained by means measurements. properties, including Young’s modulus compressive strength, positively correlated P velocity. average angles failure plane minimum maximum directions 35.8° 63.3°, respectively. almost keeps constant, S has a decreasing trend before specimen. In most samples under compression, shear occurs in middle splitting appears near both sides. Additionally, Poisson’s ratio during loading obtained, negative values occur at initial stage. Distortion rotation micro/mesorock structures may be responsible for ratio.