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

Table 5

Calculation results of zonal disintegration in Qinling water diversion tunnel.

k	Zonal width (m)	Outer diameter fractured zone (m)	Width of fractured zone (m)	Outer diameter of nonfractured zone (m)	Width of nonfractured zone (m)	Breakdown moment of the zonal disintegration (d)
0	3.07	2.49	0.49	5.07	2.58	13.4
1	1.84	5.41	0.34	6.91	1.50	19.9
2	3.83	7.48	0.57	10.74	3.26	12.5
3	0.69	10.93	0.19	11.43	0.50	12.8