Improved Protodyakonov’s Method of the Tunnel Surrounding Rock Pressure under the Seepage Condition of Weak Interlayer

Table 5

Comparison between calculated results and monitoring results.

Surrounding rock pressures access method	Vault/MPa		Left hance/MPa		Right hance/MPa
	Numerical	Error	Numerical	Error	Numerical	Error
Code method	0.278	-57.5%	0.0417~0.0834	-60.3%~-20.5%	0.0417~0.0834	-16.6%~66.8%
Protodyakonov’s method	0.136	-79.2%	0.011	-89.5%	0.011	-78%
MPM	0.908	38.8%	0.159	51.4%	0.133	166%
Field monitoring value	0.654	0	0.105	0	0.05	0

Note: .