Incorporation of a Fault Factor Into the Stability Graph Method: Kidd Mine Case Studies

He, Qingyuan; Tannant, Dwayne D.; Kaiser, Peter K.; Dusseault, M.B.

doi:10.1142/s0950609801000506

Cited by 16 publications

(9 citation statements)

References 1 publication

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“…For example, stability will be different if the fault is daylighting into the stope or if it is parallel to the stope (Suorineni 1998). Suorineni et al (2001) created a version of the Stability Chart that incorporates a fault parameter. Correlations between faults and stope stability have also been made by Woodward et al (2019).…”

Section: Literature Reviewmentioning

confidence: 99%

Assessing stope performance using georeferenced octrees and multivariate analysis

et al. 2023

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This paper presents the first steps towards a new stope design approach, where stope overbreak (OB; rock mined outside of the design) and underbreak (UB; planned rock left behind) is assessed using statistical multivariate analysis (principal component analysis [PCA] and partial least square [PLS]) and georeferenced data measured at an approximately cubic metre resolution (octrees). Results showed that OB is observed in areas of the stope where there is a large blasting energy proxy, large undercut and towards the middle of the face. UB tends to be observed near the border of the faces and where there is large blasting standoff and toeing of the rings. The resolution of the data and the use of multivariate analysis have enabled the depiction of an accurate interpretation of the variation of stope performance along the design surface, going beyond the simple per face analysis.

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Section: Literature Reviewmentioning

confidence: 99%

Assessing stope performance using georeferenced octrees and multivariate analysis

et al. 2023

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“…The study confirmed that a separate fault factor was indeed needed to improve the performance of the stability graph when stope surfaces are in the vicinity of faults. A fault factor F was developed [15] and calibrated [22] with case histories from Kidd Mine. It is argued [23] that individual mines develop their own stability graphs calibrated to suit their mining environments.…”

Section: Problem Definition and Objectivesmentioning

confidence: 99%

The stability graph after three decades in use: Experiences and the way forward

2010

International Journal of Mining, Reclamation and Environment

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The stability graph was introduced approximately three decades ago for open stope design. Since then, it has gained wide recognition in open stope design around the world in hard rock metalliferous mining. Several developments have taken place following its initial inception aimed at improving its reliability in predicting the stability state of open stopes. These developments include redefinition of the stability graph number factors, the transition zones and addition of new factors. Various types of stability graphs have also emerged over the years for other purposes such as cablebolt layout design. The original database has also been significantly expanded from the 26 cases in 1981 to 483 cases to date. This article critically reviews the developments of the stability graph to date with the objective of: (1) Synthesising the scattered knowledge of these developments in the literature to a single source. (2) Creating awareness among potential users of the method, of the problems and risks arising from the uncoordinated developments in the method and the consequences of the lack of consensus in the choice of stability number factors. (3) Identifying areas for further research to improve the reliability of the method. (4) Finally, providing guidelines to inexperienced users and practitioners unaware of the various developments on the stability graph on when to use any one of the several stability graph types currently available. The article stresses that as an empirical method, the reliability of the stability graph method is largely dependent on the size, quality and consistency of the database. Hence, there must be consistency in the determination of the stability graph factors and accepted stope stability state transition zones. The present tendency for authors to arbitrarily choose between the original and modified stability number factors result in incomparable data that cannot be combined, while the different transition zones result in different interpretations of the stability state of stopes. The review also shows that there is need for factors that account for stope stand-up time, blast damage and gravity factor that is stress factor dependent. There is also a need to develop procedures for determining stability of open stope surfaces that are made of backfill. The inexperienced user and practitioner unaware of the various versions of the stability graph should be conscious of the different versions and types of stability graphs to make the appropriate choice for his/her design. The stability graph should also be used with caution, when applied to narrow vein orebodies because no version of the graphs accounts for orebody thickness in the definitions of the stability states.

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“…It is a key controlling factor in the stability of a mine stope and the interacting openings especially with complex geometries (Diederichs and Kaiser 1999). This controlling factor of the stress relaxation on excavation stability has been recognized by several researchers (Kaiser et al 1997;Diederichs and Kaiser 1999;Kaiser et al 2001;Suorineni et al 2001;Stewart and Trueman 2004). A parametric study carried out by Suorineni et al (2001) indicated that the stress relaxation has unfavourable effects on stope stability when the induced stress is less than a critical value.…”

Section: Introductionmentioning

confidence: 98%

Stability assessment of underground mine stopes subjected to stress relaxation

Adoko

Vallejos²,

Trueman

2020

Mining Technology

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Stress relaxation plays an important role in the design of underground stopes. The aim of this paper is to assess the stope stability in connection with the stress relaxation using a classification approach. Three types of stress relaxation were clearly defined, namely partial relaxation, tangential relaxation and full relaxation. A neural network classifier was implemented to assess the stability of the stopes on the basis of case histories of stope performances. The results of the classification were compared to existing empirical methods of quantifying the stress relaxation. Overall, the present study shows higher classification accuracies, especially when the stress relaxation was considered. The results suggested that the relaxation type can be a good predictor of stability. Relaxed stope (full and tangential stress relaxation) cases are the most critical in the sense that lower accuracies were obtained and the probability of correct classification is rather erratic.

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Incorporation of a Fault Factor Into the Stability Graph Method: Kidd Mine Case Studies

Cited by 16 publications

References 1 publication

Assessing stope performance using georeferenced octrees and multivariate analysis

Assessing stope performance using georeferenced octrees and multivariate analysis

The stability graph after three decades in use: Experiences and the way forward

Stability assessment of underground mine stopes subjected to stress relaxation

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