Escape-Route Planning of Underground Coal Mine Based on Improved Ant Algorithm

Table 2

Value of parameter 𝛼_ℎ.

Height of gas layer (m)	Coefficient 𝛼ℎ	Height of gas layer (m)	Coefficient 𝛼ℎ
>6	0	1.6–1.8	2
4–6	0.1	1.4–1.6	5
2–4	0.5	1–1.4	10
1.8–2	1	<1	100