Novel Intelligent Approach for Peak Shear Strength Assessment of Rock Joints on the Basis of the Relevance Vector Machine

Table 4

Comparison between the measured peak shear strength and the calculated results by three different models.

Sample name			(deg)		(deg)	Peak shear strength (MPa)
						Measured	Grasselli	Yang	Proposed
G1	81.2	0.26	11.016	0.493	34	5.7	4.6	6.0	4.8
G2	81.2	0.26	12.121	0.498	34	5.6	5.1	6.0	4.8
G4	85.2	0.25	10.031	0.498	34	4.8	4.3	4.3	4.6
G5	166.7	0.13	9.005	0.46	34	2.4	2.3	2.0	2.7
G6	166.7	0.13	10.012	0.477	34	2.9	2.4	2.7	2.7
G7	166.7	0.13	9.939	0.47	34	2.8	2.4	2.6	2.7
G9	166.7	0.13	10.949	0.508	34	3.0	2.6	2.6	2.7
C1	23.3	0.45	9.963	0.491	36	2.2	1.9	2.2	1.7
C2	23.3	0.45	12.048	0.462	36	2.1	2.2	2.6	1.8
C3	6.7	1.55	10.179	0.46	36	5.5	5.5	5.1	4.8
C4	10.2	1.02	11.324	0.508	36	4.6	4.1	4.2	3.3
C5	8.1	1.30	11.821	0.495	36	5.0	5.2	5.1	4.1
C6	24.4	0.43	10.985	0.546	36	2.1	2.1	2.1	1.7
C8	8.1	1.30	11.028	0.555	36	4.9	4.9	4.8	4.1
M1	100.0	0.09	7.143	0.513	37	1.7	1.8	1.7	2.1
M2	50.0	0.19	5.909	0.492	37	2.3	3.2	2.4	3.8
M3	100.0	0.09	5.652	0.471	37	1.2	1.7	1.4	2.1
M4	23.3	0.41	6.689	0.513	37	5.8	6.3	5.7	6.3
M5	33.3	0.28	5.948	0.533	37	4.4	4.6	3.8	4.9
M6	33.3	0.28	6.082	0.45	37	4.3	4.4	4.0	4.9
M7	23.3	0.41	6.001	0.502	37	5.6	6.1	5.8	6.2
M8	22.7	0.42	6.250	0.459	37	6.4	6.1	5.7	6.3
M9	33.3	0.28	5.194	0.494	37	4.5	4.4	3.6	4.9
M10	100.0	0.09	5.683	0.515	37	1.5	1.7	1.4	2.1
M12	47.6	0.09	6.643	0.429	37	3.0	3.6	2.8	3.8
ML1	9.8	1.46	8.000	0.573	37	1.4	1.3	1.4	1.4
ML2	2.4	5.90	6.988	0.505	37	4.5	4.8	3.7	5.1
ML3	4.8	2.99	7.491	0.523	37	2.3	4.7	2.2	2.7
S1	83.3	0.32	13.621	0.504	39	4.3	6.0	8.1	5.2
S2	166.7	0.16	13.787	0.466	39	3.4	1.9	4.1	3.1
Granite (G3)	201.3	0.09	7.075	0.61	34	1.5	1.5	1.5	1.3
Granite (G4)	100.6	0.18	7.535	0.53	34	3.1	2.9	3.0	3.4
Granite (G5)	67.1	0.27	7.551	0.48	34	4.8	4.0	4.4	4.9
Granite (G6)	50.3	0.36	7.982	0.51	34	5.8	5.2	5.8	6.1
Granite (G7)	40.3	0.45	6.952	0.47	34	6.4	5.8	6.4	7.1
Granite (G8)	33.5	0.55	6.902	0.49	34	7.3	6.7	7.5	7.9
Granite (G9)	28.8	0.64	6.661	0.53	34	8.5	7.6	8.3	8.7
Granite (G10)	25.2	0.73	7.959	0.56	34	11.0	8.8	10.5	9.6
Granite (G11)	22.4	0.82	7.784	0.51	34	11.2	9.3	11.2	10.4
Granite (G12)	20.1	0.91	8.842	0.53	34	12.7	10.6	13.3	11.2
Sandstone (S3)	200.0	0.13	8.459	0.51	28	0.7	0.5	0.5	0.4
Sandstone (S4)	100.0	0.25	9.555	0.61	28	0.9	1.0	1.1	1.1
Sandstone (S5)	66.7	0.38	8.797	0.54	28	1.5	1.3	1.5	1.6
Sandstone (S6)	50.0	0.50	8.453	0.49	28	2.0	1.6	1.9	2.0
Sandstone (S7)	40.0	0.63	7.863	0.55	28	2.1	1.9	2.3	2.3
Sandstone (S8)	33.3	0.75	9.150	0.58	28	3.0	2.3	2.9	2.6
Sandstone (S9)	28.6	0.88	8.344	0.5	28	3.3	2.4	3.1	2.9
Sandstone (S10)	25.0	1.00	8.489	0.47	28	3.6	2.6	3.5	3.2
Sandstone (S11)	22.2	1.13	8.116	0.44	28	3.8	2.8	3.8	3.5
Sandstone (S12)	20.0	1.25	9.016	0.51	28	4.7	3.3	4.4	3.7