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

Table 1

Physical properties of the six shale samples.

Sample ID	Bedding direction	Mass (g)	Diameter (mm)	Height (mm)	Density (g/cm^3)	P-wave velocity (m/s)
T-1	Vertical	461.5	49.81	99.46	2.38	/
T-2		459.1	49.96	99.54	2.35	3805
T-3		463.4	49.9	99.67	2.38	3780
H-1	Horizontal	482.5	49.84	100.33	2.47	4457
H-2		492.4	49.91	100.21	2.51	4450
H-3		500.3	49.94	99.08	2.58	4620