Research Article
Generating Behaviors of Strong Tremors and Experimental Study of Rockburst-Triggering Criterion
Table 1
Mechanical and material properties of rocks.
| | Lithology | Natural rock properties | Model materials and ratios | Modelled rock properties | | Unit weight (kN/m3) | Compressive strength (MPa) | Young’s modulus (GPa) | Ratio of sand and binder | Ratio of cement and gypsum | Unit weight (kN/m3) | Compressive strength (MPa) | Young’s modulus (GPa) |
| | Coarse sandstone | 25.2 | 81.67 | 31.39 | 4 : 1 | 7 : 3 | 20.629 | 2.945 | 0.72 | | Fine sandstone | 24.8 | 59.75 | 26.51 | 5 : 1 | 7 : 3 | 18.2182 | 2.398 | 0.45 | | Coal seam | 13.2 | 17.92 | 9.80 | 8 : 1 | 5 : 5 | 17.1794 | 0.821 | 0.29 | | Medium sandstone | 24.5 | 71.28 | 29.88 | 4 : 1 | 5 : 5 | 18.3946 | 2.783 | 0.61 |
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