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

Table 1

Calculation parameter values of the Qinling water diversion tunnel.

Parameters	R0 (m)		(MPa)	P0 (MPa)	()
Value	2.0	0.25	37.7	22.8	31
Parameters	Er (GPa)	(MPa)	(m)	c0 (MPa)
Value	4.2	48	0.03	15	2.5
Parameters	b	(MPa)	(MPa)	G (GPa)	—
Value	50	36	36.72	1.68	—