Acoustic Emission and Fractal Precursory Characteristics of Coals with Different Bursting Liabilities in Loading Failure Process

Table 3

Bursting liability data of coal samples.

Sample source	Sample no.	Dimensions (mm)		Average value of bursting liability indexes				Evaluation result
		Length	Diameter	DT (ms)	WET	KE	RC (MPa)
Yuejin Coal Mine	Q1	100.1	50.1	72	6.18	8.34	25.7	Strong bursting liability
	Q2	100.2	49.5
	Q3	99.6	49.8
Anju Coal Mine	R1	100.1	50.3	483	2.31	1.22	7.3	Weak bursting liability
	R2	100.4	49.3
	R3	99.8	50.2
Qianshuta Coal Mine	W1	100.3	50.4	820	1.22	1.41	5.4	No bursting liability
	W2	100.3	49.6
	W3	99.4	49.5