Application of Grey Deformation Prediction Model Optimized by Double Coefficient for Tailings Dam

Table 3

Predicted vertical deformation of monitoring point 01 using different models.

Stage	Measured value/mm	GM (1, 1)		GM-LT		GM-WC
		Predicted value/mm	Relative error/%	Predicted value/mm	Relative error/%	Predicted value/mm	Relative error/%
1	7.4	7.400	0.00	7.400	0.00	7.400	0.00
2	11.2	11.551	−3.13	11.520	−2.86	11.487	−2.56
3	11.9	12.186	−2.41	12.139	−2.01	12.116	−1.81
4	13.2	12.857	2.60	12.805	2.99	12.779	3.19
5	14.0	13.565	3.11	13.524	3.40	13.479	3.72
6	14.6	14.311	1.98	14.299	2.06	14.216	2.63
7	15.0	15.098	−0.66	15.138	−0.92	14.995	0.04
8	15.6	15.929	−2.11	16.044	−2.85	15.816	−1.38
9	16.5	16.806	−1.85	17.027	−3.19	16.681	−1.10