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

Table 2

Vertical stress and pore pressure loading on the six shale samples.

Samples	Vertical stress (MPa)	Injection rate (MPa/min)	Maximum pore pressure (MPa)
H1	35	2	14.52
H2	35	2	16.78
H3	35	2	18.27
T1	35	2	26.53
T2	35	2	27.98
T3	35	2	29.04