Shock and Vibration / 2019 / Article / Tab 2

Research Article

Mechanisms of Crack Initiation and Propagation in Dense Linear Multihole Directional Hydraulic Fracturing

Table 2

Experimental scheme.

No.Principal stress (MPa)Borehole spacing D (mm)Arrangement angle of boreholes θ (deg)

Aσ1 = 6, σ2 = 5, σ3 = 414115
Bσ1 = 6, σ2 = 5, σ3 = 214115
Cσ1 = 6, σ2 = 5, σ3 = 228215