Chengdu University of Technology

Guanchang Pan

Hao Kai Zhang

Yang Yang

Bin Yang

Jiping She

Ying Zhong

Kun Chang

Xinyang Wang

The invention discloses an experimental test method for subcritical propagation rate of rock fractures based on triaxial stress-strain curve, including: Step 1: preparing test sample core for experiment; Step 2: putting core into triaxial rock mechanics test system, applying constant radial confining pressure to core, and applying axial stress in the axial direction until the core is macroscopically damaged; recording experimental parameters of axial stress, strain and corresponding loading time of the core; Step 3: drawing stress-strain curve of the test core according to detection data points of axial stress and axial strain; Step 4: in the stress-strain curve of the test core, starting time and ending time of the subcritical propagation stage of fractures inside the core correspond to the initiation stress &#x3c3;ci and damage stress &#x3c3;cd, respectively, and calculating subcritical propagation rate of the subcritical fracture propagation stage of the test core.

Experimental test method for subcritical propagation rate of rock fractures based on triaxial stress&#x2014;strain curve

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Chengdu, China

Guanchang Pan