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Record W4403935273 · doi:10.1080/19236026.2024.2398955

In situ stress measurement using mini-frac testing in the Sudbury Basin

2024· article· en· W4403935273 on OpenAlex
S. Taghipoor

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

aboutThe title or abstract carries a Canadian signal from the geographic lexicon.
no affNo Canadian affiliation: this work is invisible to an affiliation-only frame.
No Canadian affiliation. An affiliation-only frame, the usual design, would never have seen this work. It is one of the works that make the case for inverting the frame.

Bibliographic record

VenueCIM Journal · 2024
Typearticle
Languageen
FieldEngineering
TopicHydraulic Fracturing and Reservoir Analysis
Canadian institutionsnot available
Fundersnot available
KeywordsIn situGeologyStress (linguistics)Structural basinMaterials scienceGeomorphologyPhysicsMeteorology

Abstract

fetched live from OpenAlex

Stress measurement is the key step in mine design. It plays an important role when seismicity and rockbursting are expected to be major risks during project construction or mine operation. Mini-frac testing is commonly conducted for in situ stress measurement in the early stages of mine design studies before excavations are available. This paper presents the results of a series of mini-frac tests conducted at 350–750 m depth in a vertical borehole at the KGHM International Victoria Project in Sudbury, Ontario, Canada. Stress correlations were obtained using mini-frac test data and borehole breakout studies. The minimum stress orientation is vertical and gravity induced. The intermediate principal stress is horizontal with a kh (ratio of intermediate to vertical stress) equal to 1.41. For the maximum principal stress, two kH (ratio of maximum to vertical stress) values of 2.08 and 2.42 were found, based on two possible pore pressure scenarios. The estimated magnitudes of the principal stresses were also extended to depth based on borehole breakout analysis. The mini-frac test results and borehole breakout analysis achieved reasonable agreement. The borehole breakout images indicate that the maximum principal stress trend is N80E.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

Full frame distilled prediction

Teacher imitation

Not 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.

metaresearch head score (Codex)0.001
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Simulation or modeling · Consensus signal: Simulation or modeling
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.032
Threshold uncertainty score0.323

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0010.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.001
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.001
Insufficient payload (model declined to judge)0.0000.000

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.

Opus teacher head0.040
GPT teacher head0.259
Teacher spread0.219 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it