Analysis of the Variation of Friction Coefficient of Sandstone Joint in Sliding

Table 2

Error estimation table of friction coefficient estimated value and test value.

	K = 1.0 (%)	K = 1.2 (%)	K = 1.4 (%)	K = 1.6 (%)	K = 1.8 (%)	K = 2.0 (%)	K = 2.2 (%)	K = 2.4 (%)	K = 2.6 (%)	K = 2.8 (%)
c = 1.0	12.44	10.51	8.59	6.67	4.96	4.59	4.33	4.31	4.63	5.82
c = 1.1	11.69	9.71	7.73	5.75	4.55	4.17	4.13	4.32	5.15	6.87
c = 1.2	10.94	8.90	6.86	4.83	4.14	3.95	4.11	4.56	6.11	7.95
c = 1.3	10.18	8.09	5.99	4.11	3.77	3.87	4.11	5.26	7.15	9.04
c = 1.4	9.43	7.27	5.12	3.70	3.61	3.86	4.50	6.24	8.19	10.14
c = 1.5	8.67	6.45	4.24	3.36	3.59	3.90	5.24	7.24	9.24	11.27
c = 1.6	7.90	5.63	3.44	3.30	3.58	4.42	6.18	8.24	10.31	12.58
c = 1.7	7.14	4.80	2.98	3.28	3.72	5.05	7.14	9.25	11.57	13.90
c = 1.8	6.37	3.97	2.95	3.25	4.20	5.92	8.10	10.43	12.83	15.23
c = 1.9	5.59	3.27	2.91	3.50	4.80	6.83	9.18	11.65	14.11	16.57
c = 2.0	4.82	2.90	2.89	3.84	5.46	7.82	10.34	12.87	15.39	17.92