Research Article

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

Table 7

Results of risk classification of smoke poisoning.

TimeSafe area (I) (m)Slightly dangerous area (II) (m)Moderately dangerous area (III) (m)Highly dangerous area (IV) (m)

10 s(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)
20 s(0,1.3)∪(5.7,11)(1.3,1.5)∪(5,5.7)(1.5,1.6)∪(4.4,5)(1.6,4.4)
30 s(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)
40 s(0,1.3)(1.3,1.5)∪(10.6,11)(1.5,1.6)∪(9.6,10.6)(1.6,9.6)
50 s(0,1.3)(1.3,1.5)(1.5,1.6)∪(10.6,11)(1.6,10.6)
60 s(0,1.3)(1.3,1.5)(1.5,1.6)(1.6,11)