Research Article

Dynamic Fracture Toughness and Dynamic Tensile Strength of the Rock from Different Depths of Beijing Datai Well

Table 5

Dynamic fracture toughness and dynamic tensile strength of 510 m.

(MPa·m1/2·s−1) (MPa·m1/2) (MPa)

11594511.75.7
12283912.86.6
13985814.36.9
15931022.17.4
23066722.17.9
24010122.610.8
16229523.210.8
20731823.611.4