Effect of the Triaxial State of Stress in the Hydraulic Fracturing Processes of Granite: Part 1—Visual Observations and Interpretation

Keyphrases

• Multiaxial Stress State 100%
• Vertical Load 100%
• Hydraulic Fracturing Process 100%
• Stress State 75%
• Breakdown Pressure 75%
• Granite Specimens 50%
• Acoustic Emission Monitoring 50%
• Damage Process 50%
• Hydraulic Pressure 50%
• Graphical Method 50%
• Fracture Initiation Pressure 50%
• Microdamage 50%
• Microfracture 25%
• Hydraulic Fracture 25%
• Crack Propagation 25%
• Orthogonal Directions 25%
• Injection Rate 25%
• Visual Methods 25%
• Crack Initiation 25%
• Three-state 25%
• State Dependence 25%
• Axial Stress 25%
• Pressurization Rate 25%
• Initial Damage 25%
• Fracture Initiation 25%
• Induced Fracture 25%
• Vertical Stress 25%
• Crack Coalescence 25%
• Macroscopic Observation 25%
• Hydraulic Fracturing Test 25%
• Coalescence Pattern 25%
• White Patch 25%
• Initiation Pressure 25%
• Cracking Process 25%
• Damage Development 25%
• Out-of-plane Loading 25%
• Pressure Load 25%

Engineering

• Hydraulic Fracturing 100%
• Fracturing Process 100%
• Fracture Initiation 100%
• Breakdown Pressure 100%
• Acoustic Emission 66%
• Hydraulic Pressure 66%
• Microdamage 66%
• Damage Process 66%
• Observed Data 33%
• Hydraulics 33%
• Injection Rate 33%
• Stress State 33%
• Crack Initiation 33%
• Pressurization 33%
• Plane Load 33%
• Test Setup 33%
• Damage Development 33%
• Fracturing Test 33%
• Microfracture 33%
• Initial Damage 33%

Earth and Planetary Sciences

• Hydraulic Fracturing 100%
• Fracture Initiation 100%
• Acoustic Emission 66%
• Coalescing 66%
• Graphical Method 66%
• Crack Initiation 33%
• Visual Analysis 33%