Pore Water Pressure Variations in Cemented Paste Backfilled Stopes
Why this work is in the frame
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Bibliographic record
Abstract
Cemented paste backfill (CPB) has gained popularity over the past decade over other mine waste management techniques due to its high delivery rate and tight characteristics. CPB is a mixture of mine tailings, water and binder (cement). CPB has both environmental and operational benefits to a mine. Fresh CPB is being held in the stope by means of a barricade until it is cured and is self-supportive while mining operations such as blasting are going on. Barricade safety is crucial as the barricade failure would cause injuries and casualties to mining personnel as well as adding additional costs. The pressure acting on the barricade is dependent on the pore pressure that is developed and dissipated in and from CPB. The problem of self-weight consolidation of an accreting material was first studied by Gibson (1958). Shahsavari and Grabinsky (2015) modified the Gibson solution based on a new boundary condition that was inferred from in-situ measurements. However, Shahsavari and Grabinsky (2015) ignored the effect of hydration on pore pressure variations. In this study, a 1D analysis using FLAC3D is performed where the effect of hydration on pore pressure is considered through the change in material properties with time. The time dependent coefficient of permeability and shear modulus are then used to predict the pore pressure variations with time.
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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) | 0.002 | 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 it