Numerical Investigation of Relationship between Bursting Proneness and Mechanical Parameters of Coal

Table 1

Classification of the bursting proneness of coal and indices according to current standard in China [17].

Indices	No bursting proneness	Low bursting proneness	High bursting proneness
Elastic energy index (WET)	WET < 2	2 ≤ WET < 5	WET ≥ 5
Bursting energy index (KE)	KE < 1.5	1.5 ≤ KE < 5	KE ≥ 5
Dynamic rupture period (Dt) (ms)	Dt > 500	50 < Dt ≤ 500	Dt ≤ 50
Uniaxial compressive strength (Rc)	Rc < 7	7≤Rc < 14	Rc ≥ 14