In order to obtain interrelation between anisotropic mechanical characteristics of jointed rock masses and ultrasonic propagation variation

by making the cylinder samples with a precasted joint surface

the ultrasonic test and uniaxial compression test of jointed samples with 7 joint dips are conducted. The results show: (1) The ultrasonic wave velocity test values of jointed samples are discretization and obey the normal distribution. The average of wave velocity is between the intact samples and the gypsum samples

and decreases linearly with increase of joint dip. (2) The joint surface with various joint dips has a great influence on mechanical characteristics of jointed samples

so it has remarkable characteristics of anisotropy in stress-strain curve

deformation

strength and failure modes. (3) There is large difference between the mechanical characteristics of jointed samples and the ultrasonic wave propagation variation

and it will have a great error to determine the mechanical parameters via the ultrasonic wave velocity.