Failure Mechanism and Acoustic Emission Precursors of Coal Samples considering Bedding Effect under Triaxial Unloading Condition

Table 3

Acoustic emission prediction of coal sample unloading failure.

Coal sample	Parameter
	Time when	Actual failure time (s)	Difference (s)
V-X-1	501	503.4	2.4
V-X-2	505	510.7	5.7
V-X-3	502	506.2	4.2
T-X-1	413	417.6	4.6
T-X-2	405	410.5	5.5
T-X-3	411	414.6	3.6
P-X-1	395	398.7	3.7
P-X-2	387	392.9	5.9
P-X-3	389	393.8	4.8