Shock and Vibration / 2020 / Article / Fig 7

Research Article

Experimental Investigation of the Use of Expansive Materials to Increase Permeability in Coal Seams through Expansive Fracturing

Figure 7

SEM images for expansive material. (a) Sample before hydration at 2,500x. (b) Sample before hydration at 10,000x. (c) Sample after hydration at 2,500x. (d) Sample after hydration at 10,000x.

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