Characterisation of fibre-reinforced backfill/rock interface through direct shear tests
Bibliographic record
Abstract
This paper reports on the results of a laboratory investigation on the shear behaviour of the interface between granite rock and cemented paste backfill (CPB) reinforced with different amounts of fibre (F-CPB) and cured at room temperature for different lengths of time by performing direct shear tests. Moreover, various microstructural analysis techniques are also used to characterise the degree of cementation of the cemented matrix, as well as the microstructure of the interface. The results indicate that the shear properties and behaviour of the F-CPB/rock interface are a function of the fibre content (optimal fibre content) and reduce the contraction at the interface. It is also found that the optimal fibre content is a function of the curing time and applied normal stress. The shear strength envelopes indicate that the friction angle at the interface is larger in the sample that contains fibres, whereas fibre reinforcement reduces the interface adhesion. The results of this research will contribute to improvements in the design and stability assessments of fibre-reinforced cemented-backfill structures.
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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) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 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".