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

<div>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.</div>

Shock and Vibration

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Figure 7

Figure 7: Experimental Investigation of the Use of Expansive Materials to Increase Permeability in Coal Seams through Expansive Fracturing 