A Bursting Liability Evaluation Method Based on Energy Transfer

Table 1

Standard for classification of coal bursting tendency.

Parameter	Bursting liability grade
	None	Weak	Strong
Duration of dynamic fracture (ms)	DT > 500	50 < DT ≤ 500	DT ≤ 50
Elastic strain energy index	WET < 2	2 ≤ WET < 5	WET ≥ 5
Bursting energy index	KE < 1.5	1.5 ≤ KE < 5	KE ≥ 5
Uniaxial compressive strength (MPa)	Rc < 7	7 ≤ Rc < 14	Rc ≥ 14