Prediction of Final Displacement of Tunnels in Time-Dependent Rock Mass Based on the Nonequidistant Grey Verhulst Model

Table 3

Accuracy check of fitting and prediction results for different prediction models.

Monitoring component			NGM(1,1)		NGVM		INGVM
			MAPE	RMSPE	MAPE	RMSPE	MAPE	RMSPE
Fitting	Section I	zA	6.14	8.65	15.57	16.72	5.05	6.27
		cBC	7.65	7.10	18.03	19.85	6.04	6.67
	Section II	zA	7.41	8.11	16.59	18.02	5.37	7.67
		cBC	8.77	10.03	18.83	19.74	7.04	8.34
	Mean		7.49	8.47	17.46	17.26	5.88	7.24
Prediction	Section I	zA	7.06	8.35	14.23	15.96	3.69	4.16
		cBC	8.65	10.19	14.40	15.67	3.64	4.13
	Section II	zA	7.35	10.59	15.72	17.15	4.76	6.09
		cBC	8.19	11.80	13.59	16.51	4.36	5.71
	Mean		7.81	10.23	14.49	16.32	4.11	5.02