Prediction Model for Spontaneous Combustion of Coal around Boreholes Using Bedding Gas Drainage

Table 3

Entered/removed variables.

Model	Input variable	Removed variable	Methods
1	ZPZTc		Step (input F ≤ .1, excluding F ≥ .11)
2	ZP^2		Step (input F ≤ .1, excluding F ≥ .11)
3	ZFs		Step (input F ≤ .1, excluding F ≥ .11)
4	ZP		Step (input F ≤ .1, excluding F ≥ .11)
5	ZFc		Step (input F ≤ .1, excluding F ≥ .11)
6	ZPZTc.	ZPZTc	Step (input F ≤ .1, excluding F ≥ .11)
7	ZTc^2		Step (input F ≤ .1, excluding F ≥ .11)
8	ZFsZTc		Step (input F ≤ .1, excluding F ≥ .11)