Assessment of Risk Tendency of Coal Bursting Pressure in Deep Outburst Seam

Table 1

Grading standard of the impact evaluation index.

Evaluation index	Classification	Standard	Scale
dynamic failure time	I()	No impact	>500
	II()	Weak impact	50-500
	III()	Strong impact	≤500
elastic energy index	I()	No impact	<2
	II()	Weak impact	2-5
	III()	Strong impact	≥5
impact energy index	I()	No impact	<1.5
	II()	Weak impact	1.5-5
	III()	Strong impact	≥5