Prediction of Geological Parameters during Tunneling by Time Series Analysis on In Situ Data

Table 3

Prediction results of different geological parameters by LSTM and ANN under different evaluation indices. The best result is highlighted in bold.

Geologic parameter	Evaluation index	ANN	LSTM
Elastic modulus	R^2	0.5688	0.9883
	MAPE	0.0317	0.0050
	MAE	0.1862	0.0299
Bulk density	R^2	0.5945	0.9859
	MAPE	0.0131	0.0018
	MAE	0.0246	0.0034
Cohesion	R^2	0.7357	0.9914
	MAPE	0.0256	0.0053
	MAE	0.6670	0.1433
Static earth pressure coefficient	R^2	0.3051	0.9848
	MAPE	0.0273	0.0035
	MAE	0.0111	0.0014
Internal friction angle	R^2	0.6780	0.9906
	MAPE	0.0399	0.0066
	MAE	0.6722	0.1141