Characterisation and Index Properties Correlations for Marlstone and Marly Limestone of Saudi Arabia
Bibliographic record
Abstract
It has been a common practice to estimate the Unconfined Compressive strength (UCS) of rock through correlations that relate it to other index parameters such as the Brazilian Tensile Strength (BTS) and the Ultrasonic Pulse Velocity 𝑉 𝑝 ; nonetheless, selecting the most appropriate equation to use has always been a challenge considering the heterogeneity of rocks and their variant behaviour.Therefore, the use of equations which are especially developed for certain rock type at a specific location is recommended.This paper suggests 3 equations to predict UCS from BTS, bulk density (𝜌) and 𝑉 𝑝 for marlstone of the Eastern Province of Saudi Arabia.35 core samples are collected and tested in the laboratory for UCS, BTS and 𝑉 𝑝 .Statistical analysis is performed on the experimental results, and subsequently 3 statistical models that relate BTS, 𝑉 𝑝 , and rock bulk density 𝜌 to UCS are developed.Corrected correlation coefficients of the three models are found to be 0.575, 0.663, and 0.641, respectively.Additional reliable equation that relate the bulk density to 𝑉 𝑝 is produced with a corrected correlation coefficient of 0.95.
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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 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.004 | 0.002 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 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 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".