Experimental Study on the Fracture Evolution Processof Rock-like Specimens Containing a Closed RoughJoint Based on 3D-Printing Technology

Figure 13

AE curves of specimens containing rough joint with different joint lengths, i.e., (a) specimen S1-1# (l = 20.0 mm, α = 60°), (b) specimen S2-1# (l = 27.1 mm, α = 60°), (c) specimen S3-2# (l = 30.6 mm, α = 60°), (d) specimen S4-1# (l = 35.6 mm, α = 60°), and (e) Specimen S5-2# (l = 40.0 mm, α = 60°) under uniaxial compression.

(a)

(b)

(c)

(d)

(e)