Cause Analysis of Coal Mine Gas Explosion Based on Bayesian Network

Table 1

Related variables.

Level 1 variable	Level 2 variable	Level 3 variable
Gas explosion T	Methane accumulation C	Employee H1
		Equipment D1
		Environment E1
		Management M1
		Others O
	Gas accumulation F	Employee H2
		Equipment D2
		Environment E2
		Management M2
		Material A
		Others O