Experience in Australia with the application of the Mathews method for open stope design
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Notice bibliographique
Résumé
A significant open stope stability data base was developed for an Australian mine which is similar in size to the North American data base used to develop the Mathews' stability graph method. Sufficient case histories were developed to test the validity of using the two extant versions of the Mathews' method for predicting the stability of stope walls at the case study mine. Both gave similar predictions, despite different stability zonings and some differences in the way that the stability numbers are calculated. In general, the stope surfaces that were observed as unstable plotted well on both stability graphs. However, a significant percentage of stable stopes were predicted to be unstable and this percentage was much greater than that for the North American data base, indicating that the method gave more conservative predictions for this particular case study. The study indicated that the two versions of the Mathews' method may give reasonable first approximations to stope dimensions where local experience is lacking or has not been documented. Nevertheless, the development of site specific zones of stability improved the predictive capability of the technique. Case histories documented by the authors, which included stope surfaces with a hydraulic radius up to 55 m, were combined with the Canadian data base and a modified general Mathews' stability graph presented.A significant open stope stability data base was developed for an Australian mine which is similar in size to the North American data base used to develop the Mathews' stability graph method. Sufficient case histories were developed to test the validity of using the two extant versions of the Mathews' method for predicting the stability of stope walls at the case study mine. Both gave similar predictions, despite different stability zonings and some differences in the way that the stability numbers are calculated. In general, the stope surfaces that were observed as unstable plotted well on both stability graphs. However, a significant percentage of stable stopes were predicted to be unstable and this percentage was much greater than that for the North American data base, indicating that the method gave more conservative predictions for this particular case study. The study indicated that the two versions of the Mathews' method may give reasonable first approximations to stope dimensions where local experience is lacking or has not been documented. Nevertheless, the development of site specific zones of stability improved the predictive capability of the technique. Case histories documented by the authors, which included stope surfaces with a hydraulic radius up to 55 m, were combined with the Canadian data base and a modified general Mathews' stability graph presented.
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Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,001 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découle