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. 2021 Mar 24;11:6780. doi: 10.1038/s41598-021-86094-5

Figure 3.

Figure 3

Laboratory hydraulic-fracturing results on true triaxially stressed Pocheon granite cubes with three fluid-injection schemes. Flow-rate-control tests with (a) conventional- continuous, (b) stepwise-continuous, and (c) cyclic-progressive pressurisation. Red dots indicate induced AE tensile failure; light-blue dots indicate induced AE shear failure. Other parameters were chosen to be analogous to those in Fig. 2.