Mathematical Problems in Engineering

Research Article

Study on Numerical Simulation of Fire Danger Area Division in Mine Roadway

Classification results of different smoke danger zones.


Time	Index	Safe area (I) (m)	Slightly dangerous area (II) (m)	Moderately dangerous area (III) (m)	Highly dangerous area (IV) (m)

10 s	CO	(0,1.3)∪(4.2,11)	(1.3,1.5)∪(3.6,4.2)	(1.5,1.6)∪(3.2,3.6)	(1.6,3.2)
10 s	CO₂	(0,1.5)∪(3.3,11)	(1.5,1.6)∪(2.7,3.3)	(1.6,1.8)∪(2.2,2.7)	(1.8,2.2)

20 s	CO	(0,1.3)∪(5.7,11)	(1.3,1.5)∪(5,5.7)	(1.5,1.6)∪(4.4,5)	(1.6,4.4)
20 s	CO₂	(0,1.5)∪(4.6,11)	(1.5,1.6)∪(4.1,4.6)	(1.6,1.8)∪(3.6,4.1)	(1.8,3.6)

30 s	CO	(0,1.3)∪(9.5,11)	(1.3,1.5)∪(8.5,9.5)	(1.5,1.6)∪(7.6,8.5)	(1.6,7.6)
30 s	CO₂	(0,1.5)∪(7.8,11)	(1.5,1.6)∪(7.1,7.8)	(1.6,1.8)∪(6,7.1)	(1.8,6)

40 s	CO	(0,1.3)	(1.3,1.5)∪(10.6,11)	(1.5,1.6)∪(9.6,10.6)	(1.6,9.6)
40 s	CO₂	(0,1.5)∪(9.9,11)	(1.5,1.6)∪(9,9.9)	(1.6,1.8)∪(7.5,9)	(1.8,7.5)

50 s	CO	(0,1.3)	(1.3,1.5)	(1.5,1.6)∪(10.6,11)	(1.6,10.6)
50 s	CO₂	(0,1.5)	(1.5,1.6)∪(10.9,11)	(1.6,1.8) ∪(8.7,10.9)	(1.8,8.7)

60 s	CO	(0,1.3)	(1.3,1.5)	(1.5,1.6)	(1.6,11)
60 s	CO₂	(0,1.5)	(1.5,1.6)	(1.6,1.8)∪(9.8,11)	(1.8,9.8)