Mechanical Properties and Failure Modes of Thick-Walled Cylinder Granites with Different Apertures under Triaxial Compression

Table 2

The linear fitting results of confining pressures (5∼20 MPa).

d (mm)	K	Q (MPa)	R ^2	ϕ (°)	C (MPa)	θ (°)
0	5.42	177.67	0.9925	43.51	38.16	66.76
10	4.87	182.34	0.9727	41.25	41.31	65.63
15	4.65	183.46	0.9618	40.24	42.54	65.12
20	4.35	180.26	0.9677	38.77	43.21	64.39