The Geomechanical Behavior of Australian Black Coal under the Effects of CO <sub>2</sub> Injection: Uniaxial Testing
Bibliographic record
Abstract
In recent times sequestration of carbon dioxide (CO2) into unmineable coal seams has been investigated extensively, including field trials in USA, Canada, Japan and Poland. Economic feasibility studies have indicated that the cost of sequestration can be offset to some extent by harvesting the methane (CH4) in the coal seam. Besides issues with injectivity of low permeability coals, the long term safety, such as potential leakage of the sequestered gas, needs to be assessed. This requires an understanding of the geomechanical behavior of black coal. Some initial studies suggested that CO2 may have a softening effect on coal. This paper outlines some experimental results obtained in the investigation of the effects of CO2 on the strength and deformation properties of black coal. Preliminary laboratory results obtained from acoustic emission and standard stress strain plots indicate a softening effect of CO2 on black coal under uniaxial compression test conditions.
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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".