The impact of pore pressure boundary conditions in stope backfilling models
Bibliographic record
Abstract
Fully coupled numerical models for simulating mine backfill typically assume zero pore pressure conditions at the top of the fill. This implies full saturation of the fill mass. In this paper, Gibson's solution is examined to identify situations where this use of zero pore pressure boundary conditions is likely to be unrealistic. A model that is able to capture phreatic draw down and fill desaturation is then briefly described. The model also accounts for changes in strength, stiffness and permeability due to cement hydration. An example two−dimensional simulation of stope backfilling is then presented. The analysis is conducted assuming full saturation and zero pore pressure boundary conditions, as well as a more realistic simulation that accounts for desaturation. It is shown that phreatic draw down and fill desaturation have a significant impact on pore pressure within the fill mass and barricade loads.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 teacher head, 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".