Excavation damage zone cut-off dimension assessment using continuum mechanics
Bibliographic record
Abstract
A critical component of a nuclear waste repository is the cut-off seal, which will mitigate flow and gas migration along the excavation surface and damage zone.This paper examines a thin to wide slot cut-off geometry under fixed stress (an upper bound) and sedimentary rock properties.Volumetric extensile strain was used as an indicator of the extent of excavation damage prior to and after the construction of the cut-off.Using the volumetric extensile strain to plastic yield zone area ratio the cut-off performance for thickness to depth ratios between 0.05 and 0.7 were examined.It was found that for a cut-off with a thickness to depth ratio of less than 0.13 a complete disconnect could be established across the cut-off slot, indicating that a slender slot is optimum under the conditions modelled.Further modelling with different stresses and properties will establish if these results are applicable for a wider range of possible repository settings.
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
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".