Coal and Gangue Underground Pneumatic Separation Effect Evaluation Influenced by Different Airflow Directions

Table 4

Variance analysis ( and are in opposite direction).

Factor	Squariance	DOF	Mean square	value
	1.346	2	0.673	Distinctively
	1.013	2	0.506	Distinctively
	0.041	2	0.020	Distinctively
Regression	2.163	3	0.721	11.752
Error	0.307	5	0.061
Sum	2.470	8