Investigation on Acoustic Emission Kaiser Effect and Frequency Spectrum Characteristics of Rock Joints Subjected to Multilevel Cyclic Shear Loads

Figure 6

Shear stress versus shear displacement curves. (a) Cyclic shear behaviors of rock joints with constant normal stress of 1.39 MPa, 2.08 MPa, 2.78 MPa, and 3.47 MPa; (b) partial enlarged view of curve with a constant normal stress of 3.47 MPa.

(a)

(b)