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

Table 4

Predicted transverse 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	4.3	4.300	0.00	4.300	0.00	4.300	0.00
2	9.9	10.669	−7.77	10.607	−7.14	10.609	−7.16
3	11.8	11.865	−0.55	11.720	0.68	11.792	0.07
4	13.3	13.194	0.79	13.004	2.22	13.106	1.46
5	15.5	14.673	5.34	14.493	6.49	14.566	6.02
6	16.8	16.317	2.87	16.227	3.41	16.190	3.63
7	17.9	18.146	−1.37	18.255	−1.98	17.994	−0.53
8	19.8	20.179	−1.91	20.638	−4.23	20.000	−1.01
9	21.6	22.440	−3.89	23.455	−8.59	22.229	−2.91