Research Article
Experimental Study on the Self-Healing Behavior of Fractured Rocks Induced by Water-CO2-Rock Interactions in the Shendong Coalfield
Table 3
Fracture-surface mineral compositions of the three rock specimens before and after the experiment.
| | Rock samples | Before the experiment | After the experiment | | Quartz : potassium feldspar : plagioclase : clay minerals | Potassium feldspar : plagioclase | Quartz : potassium feldspar : plagioclase : clay minerals | Potassium feldspar : plagioclase |
| | Coarse-grained sandrock | 1 : 0.55 : 0.51 : 0.06 | 1 : 0.92 | 1 : 0.46 : 0.48 : 0.06 | 1 : 1.04 | | Fine-grained sandrock | 1 : 0.26 : 0.44 : 0.15 | 1 : 1.71 | 1 : 0.21 : 0.40 : 0.14 | 1 : 1.92 | | Sandy mudrock | 1 : 0.44 : 0.77 : 0.26 | 1 : 1.76 | 1 : 0.32 : 0.70 : 0.25 | 1 : 2.21 |
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