Optimal Open Pit Design and Life of Mine Scheduling of the Bisha Volcanogenic Massive Sulphide Deposit
Bibliographic record
Abstract
Bisha Mining Share Company (BMSC), Eritrea, is a subsidiary of Nevsun Resources of Canada. BMSC has completed an exploration work which discovered Volcanogenic Massive Sulphide (VMS) deposit containing commercial quantities of gold, silver, copper and zinc at Bisha. The objective of this paper is to design an optimal open pit and generate a Life of Mine (LOM) schedule for the profitable exploitation of the deposit. Thus, Net Smelter Return values were modelled using a script developed in Surpac. The deposit was optimised and an open pit was designed using MineSight software under the given geotechnical and economic parameters with a marginal tonnage deviation of 3%. A Life of Mine (LOM) schedule carried out in MineSched predicted a mine life of 10 years and defined the transitional periods for the exploitation of gold, copper and zinc deposits. It is recommended that the designed optimal pit and the LOM schedule should be used for the exploitation of the Bisha VMS deposit. Also, extensions to the primary massive sulphide mineralisation, including the Primary Zn Domain, should be tested with further drilling. This may have the effect of increasing the mineable reserve and extend the project life.
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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".