Toppling failure - A proposed analytic solution

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Publication: CIM Bulletin
Numéro: 1079
Volume: 97
Année: 2004
Texte
Publication: CIM Bulletin
Auteur(s): A. Basdag, Hidd, Bahrain and A.I. Arol
Numéro: 1079
Volume: 97
Année: 2004
Texte
Sommaire: The mining sequence at Noranda’s Bell-Allard mine calls for two mining fronts retreating toward a central pillar known as the Retreat Zone between pyramids A and C. It is clear from numerical modelling and rock mass characterization that the induced stress level in the pillar will exceed the rock mass capacity. A mining plan was developed including the re-dimensioning of stopes in the Retreat Zone, additional ground support and instrumentation in order to ensure the safety of the workforce...
Publication: CIM Bulletin
Auteur(s): V. Falmagne, G. Gagnon, D. Ouellet, B. Simser
Mots clés: Retreat Zone, Bell-Allard mine, Mining strategy, Stope.
Numéro: 1079
Volume: 97
Année: 2004
Texte
Sommaire: This paper describes a sudden spill of waste rock used for backfilling from a waste pass at an underground mine in Canada, thus causing a major failure/accident. The mine operator immediately launched a detailed investigation to understand the causes of this accident and develop procedures to prevent any recurrence of such events in the future. The authors from McGill University were invited to collaborate with the engineers at the mine to examine this accident. The events leading to the...
Publication: CIM Bulletin
Auteur(s): F. Hassani, J. Ouellet, P. Gauthier, K. Moozar
Mots clés: Liquefaction, Fill raise, Bousquet Complex, Case study.
Numéro: 1079
Volume: 97
Année: 2004
Texte
Sommaire: A research effort has been undertaken, under Workplace Safety and Insurance Board of Ontario (WSIB) sponsorship, to characterize the support capabilities of conventional and innovative spray-on lining materials for mitigating dynamic failure effects created by simulated rockbursts. Conventional spray support media, such as shotcrete and fibrecrete linings, and a variety of new spray-on lining materials [thin, spray-on liners (TSLs)], typically polymer-type thin coatings, were subjected to...
Publication: CIM Bulletin
Auteur(s): J.F. Archibald, P.D. Katsabanis
Mots clés: Blast damage mitigation, Spray-on linings, Field testing.
Numéro: 1079
Volume: 97
Année: 2004
Texte
Sommaire: Ground vibration is the natural result of the blasting process. Many empirical formulae and methodologies including analysis of travel path effects have been developed. The scaled distance, which is the most popular approach for the calculation of the attenuation of particle velocity in the ground, has led to significant advances in the prediction of particle velocity when both explosive charge and distance vary. However, this approach does not consider the effect of ground anisotropy and...
Publication: CIM Bulletin
Auteur(s): G.G.U. Aldas, H.A. Bilgin
Mots clés: Blast vibration, Seismic wave, Wave propagation, Vibration measurement.
Numéro: 1079
Volume: 97
Année: 2004
Texte
Sommaire: Geostatistical conditional simulations are becoming increasingly popular as tools that provide models of uncertainty at different stages of a mining project. They have been used as grade control tools in daily operations to assess the uncertainty of mineable reserves at the project’s feasibility stage, and to assess mineralization potential in certain settings. Other applications include assessment of recoverable reserves, resource and reserve classification, and drill hole spacing optimizati...
Publication: CIM Bulletin
Auteur(s): M.E. Rossi, J.E. Camacho
Mots clés: Geostatistical conditional simulation, Resource classification, Probability intervals, Open pit, Underground mine.
Numéro: 1079
Volume: 97
Année: 2004
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