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

Table 2

Felicity ratios under different normal stress.

Cycle No.	MPa	MPa	MPa	MPa
	Peak stress in each cycle/MPa, Kaiser stress/MPa, and Felicity ratio (FR)
1	0.57, 0.58, 1.02	0.58, 0.66, 1.14	0.57, 0.72, 1.26	0.57, 0.59, 1.03
2	0.84, 0.84, 1.00	0.85, 0.85, 1.00	0.85, 0.95, 1.11	0.84, 0.84, 1.00
3	1.03, 1.02, 0.99	1.14, 1.13, 0.99	1.13, 1.14, 1.01	1.12, 1.10, 0.98
4	1.13, 1.06, 0.94	1.40, 1.39, 0.99	1.40, 1.37, 0.98	1.40, 1.35, 0.96
5			1.69, 1.64, 0.97	1.68, 1.60, 0.96
6				1.95, 1.83, 0.94
7				2.23, 2.09, 0.94