| dc.description.abstract | The compositions, arrangement and mineral crystal orientation of rocks are affected by precipitation, earth stress or temperature... physical and chemical reactions during the diagenesis process. Hence, the mechanical behaviors (i.e. strength, elastic modulus, Poisson′s ratio…) usually accompany anisotropy properties, such as: schist or jointed rock mass. For geotechnical engineering, the rock mechanical anisotropy plays an important role for tunnel, slope designs, and their constructions. Non-destructive ultrasonic testing can evaluate strength and deformability of rock material, which provides in-situ judgment basis.
This paper presents Snell’s law to investigate wave propagation behavior of anisotropic rocks. This paper analyzes P-wave anisotropy of natural rocks from previous studies, and observes 3 different shapes of P-wave anisotropy, includes circular, ellipse, dumbbell-shaped, eye shape. Parametric study is addressed for determining the shapes of P-wave anisotropy. Finally, this paper will clarify the cause of P-wave anisotropy according to the parametric study.
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