Stability Analysis of Surrounding Rock of Large Section Ultradeep Shaft Wall

Table 2

Statistical table of stress and deformation data of shaft X-direction section after excavation.

Distance (m)	Displacement (mm)	Maximum principal stress (MPa)	Minimum principal stress (MPa)
28	0.04	48.31	25.62
24	0.05	48.38	25.63
20	0.07	48.52	25.65
16	0.13	48.82	25.71
12	0.27	49.40	25.88
8	0.60	50.55	26.37
4	1.64	52.37	27.83
0	6.15	52.28	34.32
−4	13.77	2.50	23.11
−8	15.95	2.54	23.53
−12	16.98	2.52	23.35
−16	17.56	2.50	23.00
−20	17.91	2.49	22.67
−24	18.12	2.47	22.39
−28	18.24	2.46	22.18