Continuum-Based Voronoi Tessellated Models for Capturing Unloading-Induced Brittle Damage in Hard Rocks
Bibliographic record
Abstract
The continuum numerical program RS2 was used to generate a Voronoi Tessellated Model (VTM), consisting of blocks meshed into several triangular elements and block boundaries simulated using joint elements.The RS2-VTM was calibrated to the compressive and tensile strengths of undamaged Lac du Bonnet (LdB) granite.The simulation results indicated a reasonable agreement between the peak strength and post-peak response of the RS2-VTM and those of LdB granite.Next, simplified 3D coring stress paths for horizontal and vertical boreholes at the 420 level of Canada's Underground Research Laboratory (URL) were applied to the calibrated RS2-VTM.The simulated core damage (i.e., yielded joint elements in RS2) was found to be comparable to that of discontinuum models.Finally, 2D and 3D stress paths experienced by the rock mass in the roof of the Mine-by Experiment (MBE) tunnel at the URL were applied to the calibrated RS2-VTM.It was found that the 3D stress path causes more damage compared to the 2D stress path due to the tensile stress generated ahead of the MBE tunnel face, which is not captured in 2D models.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".