Optimized Analysis Method for Evaluating the Shear Strength Parameters of Rock Joint Surfaces

Table 3

Shear strength parameters calculated using the proposed single-specimen method.

Serial number	σn (MPa)	Experimental value of τ (MPa)	Theoretical value of τ (MPa)	c (MPa)	ϕ (°)
1	1.0	1.07	—	0.24	39.99
	1.5	—	1.51
	2.0	—	1.93
	2.5	—	2.33
2	1.0	1.13	—	0.28	40.85
	1.5	—	1.58
	2.0	—	2.02
	2.5	—	2.43
3	1.0	1.21	—	0.33	41.90
	1.5	—	1.68
	2.0	—	2.13
	2.5	—	2.56
4	1.0	—	0.91	0.15	38.34
	1.5	1.30	—
	2.0	—	1.68
	2.5	—	2.05
5	1.0	—	1.07	0.24	39.31
	1.5	1.51	—
	2.0	—	1.93
	2.5	—	2.33
6	1.0	—	1.14	0.29	40.99
	1.5	1.60	—
	2.0	—	2.03
	2.5	—	2.45
7	1.0	—	0.91	0.16	37.52
	1.5	—	1.32
	2.0	1.70	—
	2.5	—	2.07
8	1.0	—	1.09	0.25	40.32
	1.5	—	1.54
	2.0	1.96	—
	2.5	—	2.37
9	1.0	—	1.33	0.40	42.98
	1.5	—	1.83
	2.0	2.30	—
	2.5	—	2.74
10	1.0	—	1.15	0.29	41.12
	1.5	—	1.61
	2.0	—	2.03
	2.5	2.46	—
11	1.0	—	1.24	0.34	41.92
	1.5	—	1.72
	2.0	—	2.17
	2.5	2.60	—
12	1.0	—	1.41	0.46	44.06
	1.5	—	1.92
	2.0	—	2.40
	2.5	2.86	—