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 13

Variance analysis of aquiclude seepage rate.

Source of variance	Squared sum of variance	DoF	Squared sum of average variance	value	Critical value	Significance
Upper coal seam mining height		2		85.60432
Lower coal seam mining height		2		110.68037
Seam spacing		2		87.96814
Error		2
Sum		8