Dynamic Behavior and Energy Evolution Characteristic of Deep Roadway Sandstone Containing Weakly Filled Joint at Various Angles

Figure 9

Typical energy–time curves. (a) and (d) for specimen with a joint angle of 15° under strain rate of 30 s⁻¹ and 105 s⁻¹, respectively; (b) and (e) for specimen with a joint angle of 45° under strain rate of 30 s⁻¹ and 105 s⁻¹, respectively; and (c) and (f) for specimen with a joint angle of 75° under strain rate of 30 s⁻¹ and 105 s⁻¹, respectively.

(a)

(b)

(c)

(d)

(e)

(f)