Experimental Study on the Self-Healing Behavior of Fractured Rocks Induced by Water-CO₂-Rock Interactions in the Shendong Coalfield

Figure 8

Dissolution/corrosion of fracture-surface primary minerals in sandy mudrock and secondary minerals formed on the surface of the primary minerals as observed through SEM. (a) Corroded potassium feldspar crystals (dissolution hole on the crystal surface). (b) Secondary kaolinite on the surface of primary potassium feldspar. (c) EDS analysis in the box of (a). (d) EDS analysis in the No. 1 box of (b). (e) EDS analysis in the No. 2 box of (b).

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