Back Analysis of Geomechanical Parameters Using Hybrid Algorithm Based on Difference Evolution and Extreme Learning Machine

Table 3

The comparison between unitary displacement feedback analysis and joint feedback analysis.

Measure points	Displacement back analysis			Displacement-stress back analysis
	Monitoring data	Forecast data	Relative error %	Monitoring data	Forecast data	Relative error %
A	−12.512	−13.589	8.608	−12.512	−11.97	−4.316
B	11.296	12.461	10.313	11.296	10.79	−4.479
C	3.788	4.125	8.897	3.88	3.78	−2.719
D				−46.5	−45.93	−1.233
E				−103.78	−105.91	2.048
F				−48.6	−50.22	3.337