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Hydraulic fracturing technique has been used to exploit hydrocarbons resources in the past years. To investigate the mechanism of hydrofracturing process, a true triaxial hydraulic fracturing device combined with acoustic emission (AE) system is employed to study the crack initiation and propagation under different injection rates. Furthermore, a 3D scanner is employed to obtain the morphology of...
In this paper, an experimental investigation of sandstone samples from the Three Gorges during shear failure was conducted using acoustic emission (AE) and direct shear tests. The AE count rate, cumulative AE count, AE energy, and amplitude of the sandstone samples were determined. Then, the relationships among the AE signals and shearing behaviors of the samples were analyzed in order to detect micro-crack...
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