Space-Time Evolution Laws of Zonal Disintegration in Deep Underground Caves Based on Coordination Deformation between the Bolt Body and Surrounding Rock

Table 6

Comparison of theoretical calculation and field measurement of zonal disintegration in Qinling water diversion tunnel.

Zonal diameter (m)		Field monitoring (m)	Calculation result (m)	Error (%)
0	Inner diameter	2.00	2.00	16.7
	Outer diameter	2.42	2.49
1	Inner diameter	5.18	5.07	−2.9
	Outer diameter	5.53	5.41
2	Inner diameter	6.95	6.91	15.4
	Outer diameter	7.41	7.48
3	Inner diameter	10.83	10.74	−13.6
	Outer diameter	11.05	10.93