Prediction Model for Spontaneous Combustion of Coal around Boreholes Using Bedding Gas Drainage

Table 4

Model variances.

Model	R	R^2	Adjusted R^2	Error in standard estimation	Change in the statistical metrics
					R^2 variation	F variation	Degrees of freedom 1
1	0.634^a	0.402	0.359	0.80064328	0.402	9.400	1
2	0.741^b	0.549	0.479	0.72164473	0.147	4.233	1
3	0.817^c	0.667	0.584	0.64475177	0.119	4.286	1
4	0.867^d	0.751	0.660	0.58278835	0.083	3.687	1
5	0.904^e	0.817	0.726	0.52346855	0.066	3.634	1
6	0.904^f	0.817	0.750	0.49992426	−0.001	0.033	1
7	0.934^g	0.872	0.808	0.43806416	0.055	4.326	1
8	0.955^h	0.912	0.853	0.38307345	0.040	4.077	1