Aquiclude Stability Evaluation and Significance Analysis of Influencing Factors of Close-Distance Coal Seams: A Case Study of the Yili No. 4 Coal Mine in Xinjiang, China

Table 12

Variance analysis of aquiclude horizontal deformation.

Source of variance	Squared sum of variance	DoF	Squared sum of average variance	value	Critical value	Significance
Upper coal seam mining height		2		13.41566
Lower coal seam mining height		2		12.63596
Seam spacing		2		2.84346
Error		2
Sum		8