Experiment and Failure Analysis of Rock-Like Material Affected by Different Excavation Depths

Table 1

Uniaxial compression test results of specimen with single hole.

Conditions and results	C0H0	C0H20	C0H40	C0H60	C0H80	C0H100
Diameter of hole (mm)	20	20	20	20	20	20
Depth of hole (mm)	0	20	40	60	80	100
Length of crack (mm)	0	0	0	0	0	0
E (GPa)	6.34	5.52	5.17	3.29	3.04	2.87
Initial cracking stress (MPa)	23.4	14.45	8.78	4.74	4.26	3.58
Peak stress (MPa)	48.47	43.94	40.41	31.42	27.59	21.91
Peak strain (10^−3)	16.18	13.21	12.42	13.83	11.71	13.99