Bibliographic record
Abstract
New Afton Mine is a block caving operation, located approximately 10 kilometres outside of Kamloops and 350 kilometres northeast of Vancouver in British Columbia. The New Afton orebody has a unique combination of geometric and geotechnical conditions, including a long and narrow footprint which is highly faulted and hence comprises large areas of poor ground, all of which is subject to a relatively high major horizontal principal stress. The initial deformations (convergence) experienced on the production level (extraction level) of the Lift 1 West Cave proved relatively manageable; however, as mining moved eastward towards the Lift 1 East Cave, which comprised significantly poorer rock mass quality, deformation rates increased causing substantial damage and subsequent repair of the footprint. Block caving in a poor rock mass subject to high cave induced stress changes typically experience large plastic deformations which manifest as drive convergence and in some cases complete drive closure. Such conditions require comprehensive extraction drive and drawpoint redevelopment (rehabilitation), which consequently increases operating costs and constraints production. A conceptual model of convergence and comprehensive ground control rehabilitation strategy for existing drawpoints and extraction drives has been implemented at the New Afton Mine with the aim of managing rock mass damage and maintaining drawpoint integrity until mining is exhausted. A review of ground support and rehabilitation methods along with the conceptual convergence model are discussed. An example case of a drawpoint and associated extraction drive area that was successfully recovered following high convergence is presented.
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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 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.002 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.000 |
| 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".