Research Article
Mechanical Parameters of Deep-Buried Coal Goaf Rock Mass Based on Optimized GSI Quantitative Analysis
Table 4
Compressive strength and deformation modulus of shale, sandstone, and limestone.
| | Compressive strength and deformation modulus based on test | Range value of dry rock | Average value of dry rock | Range value of saturated rock | Average value of saturated rock | The ratio of saturated average value to dry average value |
| | Compressive strength of shale (MPa) | 33.8–36.9 | 35.32 | 17.6–28.3 | 22.91 | 64.9% | | Deformation modulus of shale (GPa) | 26.2–35.2 | 33.0 | 11.8–39.9 | 20.5 | 62.1% | | Compressive strength of sandstone (MPa) | 42.2–58.1 | 47.76 | 24.9–39.0 | 31.91 | 66.8% | | Deformation modulus of sandstone (GPa) | 23.7–46.0 | 34.8 | 10.9–27.1 | 21.0 | 60.3% | | Compressive strength of limestone (MPa) | 51.9–101.6 | 80.4 | 53.8–85.1 | 62.3 | 77.5% | | Deformation modulus of limestone (GPa) | 70.0–95.9 | 84.9 | 61.1–87.3 | 73.4 | 86.5% |
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