NUMERICAL STUDY ON CONFINING PRESSURE EFFECT IN THE PROCESS OF ROCK FAILURE
The deformation mechanism of rock under different constant confining pressure was briefly analysed based on continuum damage mechanics and the effects of confining pressure on deformation, strength and macroscopic fracture patterns of model rock specimens are also studied using the Rock Failure Process Analysis (RFPA2 D) code. The theoretical analysis and numerically obtained results duplicate the deformation, strength (such as Young’s modulus, compressive strength, etc.) and macroscopic fracture patterns observed in laboratory. The theoretical studies and numerical simulations are extremely instructive and indicative for investigating some catastrophic hazard phenomena such as rock bursts and instability induced by excavation.
KeywordsBrittle Ductility Excavation Geophysics Meso
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