Research on Failure Mechanism and Parameter Sensitivity of Zonal Disintegration in Deep Tunnel

Table 1

Comparison between theoretical calculation result and in situ test value.

Fracture zone		In situ test value	Theoretical calculation result
1	Inner radius (m)	2.50	2.50
	External radius (m)	4.99	4.64
2	Inner radius (m)	5.75	5.52
	External radius (m)	6.55	6.75
3	Inner radius (m)	7.74	7.56
	External radius (m)	8.78	8.93
4	Inner radius (m)	9.87	9.65
	External radius (m)	10.40	11.36