Table 2 Mechanical parameters of similar specimens with different material ratios.
From: Hydraulic horizontal slit-stress synergistic unloading fracturing in coal seams
Serial Number | Material ratio | Tensile strength/MPa | Compressive strength/MPa | Elastic modulus/GPa | Poisson’s ratio | Density g/cm3 |
|---|---|---|---|---|---|---|
Sand: Lime: Gypsum | ||||||
1 | 3: 0.7: 0.3 | 2.29 | 2.42 | 0.25 | 0.21 | 1.84 |
2 | 3: 0.6: 0.4 | 2.95 | 3.47 | 0.33 | 0.29 | 1.94 |
3 | 3: 0.5: 0.5 | 3.09 | 3.02 | 0.28 | 0.24 | 1.99 |
4 | 3: 0.4: 0.6 | 3.23 | 3.42 | 0.17 | 0.31 | 1.94 |
5 | 3: 0.3: 0.7 | 3.84 | 5.31 | 0.22 | 0.28 | 1.92 |
6 | 5: 0.7: 0.3 | 1.39 | 1.99 | 0.22 | 0.22 | 2.08 |
7 | 5: 0.6: 0.4 | 1.73 | 3.29 | 0.17 | 0.34 | 2.17 |
8 | 5: 0.5: 0.5 | 2.24 | 4.79 | 0.23 | 0.25 | 2.12 |
9 | 5: 0.4: 0.6 | 1.75 | 4.57 | 0.28 | 0.29 | 2.07 |
10 | 5: 0.3: 0.7 | 2.24 | 9.24 | 0.36 | 0.23 | 2.17 |
11 | 7: 0.7: 0.3 | 1.79 | 2.41 | 0.27 | 0.31 | 2.14 |
12 | 7: 0.6: 0.4 | 1.33 | 1.97 | 0.32 | 0.27 | 2.09 |
13 | 7: 0.5: 0.5 | 1.01 | 3.94 | 0.60 | 0.37 | 2.12 |
14 | 7: 0.4: 0.6 | 1.73 | 4.46 | 0.17 | 0.25 | 2.17 |
15 | 7: 0.3: 0.7 | 2.04 | 4.56 | 0.37 | 0.26 | 2.14 |
