Failure Behaviour of Sandstone with a Preexisting Joint under Stepped Excavation

Table 2

The tested samples under the stepped excavation test.

Number	Sample ID	Joint inclination (°)	Normal load (kN)
1	S-0-80	0	80
2	S-0-100	0	100
3	S-30-80	30	80
4	S-30-100	30	100
5	S-45-80	45	80
6	S-45-100	45	100
7	S-60-80	60	80
8	S-60-100	60	100
9	S-90-80	90	80
10	S-90-100	90	100