Research on Influencing Factors of Effective Gas Extraction Radius in Coal Mine Based on Multiple Linear Regression

Table 6

Summary of multivariate analysis models^b.

Model	R	R^2	Adjusted R^2	Standard estimation error	D-W
1	0.920^a	0.846	0.790	0.18461	1.632

^aPredictor variable: extraction time, initial permeability of coal seam, extraction negative pressure, and hole diameter. ^bDependent variable: effective gas extraction radius.