Research on the Influence of Natural Wind Pressure in Deep Mines on Ventilation Stability

Table 2

Correlation evaluation criteria based on r value.

r value	−1∼−0.8	−0.8∼−0.5	−0.5∼−0.3	−0.3∼0	0∼0.3	0.3∼0.5	0.5∼0.8	0.8∼1
Correlation	Highly negative correlation	Moderately negative correlation	Low negative correlation	Weak negative correlation	Weak positive correlation	Low positive correlation	Moderately positive correlation	Highly positive correlation