Research Article
Numerical Test Study of the Microscale Failure Modes and Fractal Analysis of Lower Cambrian Shale Based on Digital Images
Table 3
AE energy and fractal dimension values under different stress levels and different confining pressures.
| Stress level | Confining pressure(MPa) | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% | 100% |
| 0 | AE energy | 0 | 0 | 0 | 0 | 0.0001 | 0.0013 | 0.0112 | 0.0562 | 0.3035 | 40.3338 | Ds | 0 | 0 | 0 | 0.4752 | 0.6617 | 0.8330 | 1.2060 | 1.1880 | 1.3670 | 1.5130 | 2 | AE energy | 0 | 0 | 0 | 0.0001 | 0.002 | 0.0196 | 0.1532 | 1.2084 | 6.0286 | 64.1970 | Ds | 0 | 0 | 0 | 0.5329 | 0.772 | 1.0020 | 1.2610 | 1.5000 | 1.5920 | 1.6770 | 4 | AE energy | 0 | 0 | 0 | 0 | 0.0012 | 0.0295 | 0.2413 | 1.5184 | 19.9760 | 108.7755 | Ds | 0 | 0 | 0 | 0.4197 | 0.6455 | 1.0030 | 1.2640 | 1.506 | 1.7010 | 1.7840 | 6 | AE energy | 0 | 0 | 0 | 0 | 0.0020 | 0.0332 | 0.3025 | 2.1536 | 24.1428 | 154.0042 | Ds | 0 | 0 | 0 | 0.4076 | 0.6360 | 0.9952 | 1.2820 | 1.5230 | 1.725 | 1.8350 | 8 | AE energy | 0 | 0 | 0 | 0 | 0 | 0.019 | 0.2106 | 1.7971 | 33.5573 | 279.7562 | Ds | 0 | 0 | 0 | 0 | 0.4197 | 0.8818 | 1.2110 | 1.5040 | 1.7150 | 1.8930 | 10 | AE energy | 0 | 0 | 0 | 0 | 0.0006 | 0.0175 | 0.2069 | 1.7615 | 45.5702 | 377.1735 | Ds | 0 | 0 | 0 | 0 | 0.5012 | 0.8274 | 1.1680 | 1.4850 | 1.7130 | 1.9210 |
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