Study on Synchronous Response Law of Acoustic and Electrical Signals of Outburst Coal Rock under Load and Fracture

Table 3

Correlation coefficient among EMR, AE, and stress drop.

Sample number	EMR and stress drop	EMR cumulative and stress drop	AE and stress drop	AE cumulative and stress drop	EMR and AE number	EMR and AE cumulative number
Y1	0.865	0.892	0.568	0.705	0.493	0.768
Y3	0.915	0.984	0.454	0.825	0.486	0.792
Average	0.89	0.938	0.511	0.765	0.4895	0.78