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

Figure 8

Variation in strain response for coal-like materials with reaction time similar to the expansive material considered here. (a)-1 Hydration reaction time 3 h (x direction strain). (a)-2 Hydration reaction time 3 h (y direction strain). (b)-1 Hydration reaction time 6 h (x direction strain). (b)-2 Hydration reaction time 6 h (y direction strain). (c)-1 Hydration reaction time 10 h (x direction strain). (c)-2 Hydration reaction time 10 h (y direction strain).