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

Figure 6

P wave velocities of sandstone, in which the blue line represents the maximum wave velocity direction and the red line represents the minimum wave velocity direction.

(a) No. 1 sandstone

(b) No. 2 sandstone

(c) Mudstone

(d) No. 3 sandstone

(e) No. 4 sandstone

(f) No. 5 sandstone

(g) No. 6 sandstone

(h) No. 7 sandstone

(i) No. 8 sandstone