Fig. 7

Curves of shear stress, resistivity, and acoustic emission ringing count rate vs. time during sandstone shear failure at different shear rates: (a) 0.1Â mm/min; (b) 0.2Â mm/min; (c) 0.5Â mm/min; (d) 1.0Â mm/min.

Curves of shear stress, resistivity, and acoustic emission ringing count rate vs. time during sandstone shear failure at different shear rates: (a) 0.1Â mm/min; (b) 0.2Â mm/min; (c) 0.5Â mm/min; (d) 1.0Â mm/min.