The Effect of Shearing on Fully-grouted Rebar Rock Bolts in Saskatchewan Potash Mines
Bibliographic record
Abstract
Reinforcing bar (rebar) is a common method of ground support in underground potash mines in Saskatchewan. The rebar is anchored into the potash rock to provide support using resin and the system is referred to as a fully-grouted rebar rock bolt. The rebar can be subjected to tensile deformation and shear deformation due to the geomechanical properties of potash and the presence of relatively weak interbedded clay seams. Although the tensile deformation of the rebar is well understood, shear deformation is not.\n\nThis research project focussed on determining the magnitude of shear plane displacement that a rebar rock bolt can withstand before failure. The objectives of this research were achieved using a combination of laboratory testing, field testing, and in situ instrumentation for monitoring field behaviour.\n\nUltimately, a design chart was generated to estimate the shear displacement capacity of rebar rock bolts under varying shear plane apertures. This chart is meant to help mine engineers determine re-bolting requirements to maintain safe drift access for mine personnel.
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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 | 0.001 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 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".