Research Article
Experimental Investigation of the Use of Expansive Materials to Increase Permeability in Coal Seams through Expansive Fracturing
Table 3
Physical parameters of each compound.
| | | CaO | MgO | CaO·Al2O3 | CaSO4 | Ca (OH)2 | Mg (OH)2 | H2O |
| | Molecular weight (g) | 56.08 | 40.30 | 101.96 | 172.17 | 74.08 | 58.32 | 18.02 | | Apparent density (g/cm3) | 3.34 | 3.58 | 3.90 | 2.61 | 2.24 | 2.36 | 1.00 | | Gram-molecular volume (cm3) | 16.79 | 11.26 | 26.14 | 65.97 | 33.08 | 24.71 | 18.02 |
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