Research on the Impact of Different Force Directions on the Mechanical Properties and Damage Evolution Law of Sandstone with Different Hole Diameters

Figure 10

Stress-time-acoustic emission information of the rock sample with the vertical hole of different diameters. (a) Stress-N-time of rock A00. (b) Stress-N-time of rock E05. (c) Stress-N-time of rock F10. (d) Stress-N-time of rock G15.

(a)

(b)

(c)

(d)