Exploration of microwave-assisted breakage of rocks: The effect of size, shape, and internal discontinuity of rock on microwave distribution
Why this work is in the frame
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Bibliographic record
Abstract
Microwave- assisted breakage of rocks has proved to be more efficient than traditional methods at separating valuable minerals from gangue during mineral processing. However, little research has been conducted in terms of the applications of microwave-assisted rock breakage to tunnel excavation. The combination of a microwave system and Tunnel Boring Machine (TBM) has the potential to be an efficient tunnel excavation tool that is suitable in operating in both hard and soft rock conditions. As a small component of a larger project related to the microwave-assisted TBMs, the purpose of this thesis is to experimentally demonstrate internal temperature distribution properties for basalt rocks having different sizes, shapes, and internal spacing. In addition, correlations are quantified among microwave absorption, volume, and sample temperature after microwave treatment in a multimode cavity. Key finding are: 1.When the diameter to height ratio of a cylindrical core is more than 1, only one peak temperature appears somewhere in the middle of the core. When the ratio is less than 1, two temperature peaks appear near the ends of the core, and the diameter to height ratio that can result in two temperature peaks increases as the diameter of the core increases; 2. The shape has no obvious influence on temperature distribution; 3.Internal spacing of 1mm doesnât influence the temperature distribution when the core is fully exposed to microwave radiation. Internal spacing of more than 1mm significantly reduces heating efficiency when only one surface of the core is exposed to plane microwave radiation; 4.The electromagnetic power absorption increases and the average temperature decreases with increasing sample volume. The trends are well described by power series.
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| 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 it