Research Article
Research on Microscopic Evolution Laws of Sandstone Deformation and Failure Based on the Particle Discrete Element Method
Table 2
Comparison between the laboratory test and PFC3D numerical simulation results for sandstones.
| | Confining pressure (MPa) | Sample state | Peak strength | Elastic modulus | Peak strain | | Experimental value (MPa) | PFC modelling value (MPa) | Experimental value (MPa) | PFC modelling value (MPa) | Experimental value (MPa) | PFC modelling value (MPa) |
| | 0 | Natural | 68.17 | 66.87 | 12.74 | 16.11 | 4.67 | 4.67 | | Saturated | 37.13 | 31.80 | 10.22 | 8.31 | 4.20 | 4.16 |
| | 5 | Natural | 78.41 | 78.21 | 14.31 | 15.62 | 5.96 | 5.95 | | Saturated | 71.64 | 71.20 | 11.66 | 13.84 | 6.37 | 6.46 |
| | 10 | Natural | 102.60 | 107.40 | 20.91 | 20.59 | 6.21 | 6.00 | | Saturated | 77.02 | 76.29 | 15.21 | 18.07 | 7.34 | 7.78 |
| | 15 | Natural | 115.29 | 116.61 | 29.05 | 25.26 | 6.94 | 6.75 | | Saturated | 97.93 | 99.01 | 21.36 | 21.33 | 7.27 | 7.19 |
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