Multifractal Analysis of Acoustic Emissions during Hydraulic Fracturing Experiments under Uniaxial Loading Conditions: A Niutitang Shale Example

Table 3

Values of and for different samples at different stages.

Sample		Counts				Energy
		Stage I	Stage II	Stage III	All stages	Stage I	Stage II	Stage III	All stages
H1		1.296	2.440	3.291	3.208	1.113	3.243	4.024	3.986
		0.007	0.607	-0.147	0.714	-0.029	0.301	-0.262	0.135
H2		0.006	1.197	2.574	2.557	0.006	1.555	3.800	3.780
		-0.003	-0.430	0.264	1.643	-0.003	-0.090	0.282	1.639
H3		0.841	1.076	2.291	2.946	2.008	2.374	3.493	3.874
		0.142	-0.180	0.129	1.060	0.061	0.035	-0.001	0.336
T1		3.151	1.608	3.927	3.921	3.966	1.738	4.764	4.756
		0.993	-0.336	0.255	0.690	0.804	-0.357	0.297	0.586
T2		0.004	1.177	3.133	3.329	0.521	1.839	4.402	4.596
		0.002	0.552	0.000	-1.884	-0.537	0.214	0.011	-1.839
T3		2.154	1.631	1.804	2.140	3.287	2.379	3.192	3.261
		0.567	-0.073	1.143	1.631	0.667	0.046	1.121	1.562