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

Table 5

AE correlation dimension of weak bursting liability coal in different failure stages.

Peak stress ratio (%)	Fitting correlation coefficient r	Correlation dimension value D
0∼5	0.85	0.80
5∼10	0.89	0.14
10∼15	0.93	0.71
15∼20	0.88	1.16
20∼25	0.90	0.52
25∼30	0.87	0.06
30∼35	0.88	0.14
35∼40	0.93	0.10
40∼45	0.95	0.15
45∼50	0.95	0.60
50∼55	0.88	0.04
55∼60	0.91	0.21
60∼65	0.87	0.53
65∼70	0.89	0.04
70∼75	0.88	0.46
75∼80	0.94	0.44
80∼85	0.96	2.11
85∼90	0.92	0.50
90∼95	0.97	0.03
95∼100	0.88	0.03