Brittleness Risk Evaluation of Mine Safety Based on Brittle Relational Entropy

Table 1

Interaction characteristics of the mine safety system in serious failure of function.

Active object/subsystem	Affected object/subsystem
	H-S	M-S	E-S	O&M-S
Human (H-S)	—	○	●	△
		□	△	●
Machine (M-S)	□	—	●	△
	○		△	○
Environment (E-S)	△	△	—	△
	●	●		●
Operations management (O&M-S)	●	○	●	—
	△	△	△

●-layout interaction, ○-functional interaction, □-alternative interaction, and △-resilience interaction.