Goldcorp is a gold producer headquartered in Vancouver, British Columbia, Canada. The company employs more than 16,000 people worldwide, engaged in gold mining and related activities including exploration, extraction, processing and reclamation. Goldcorp’s operating assets include five mines in Canada and the U.S., three mines in Mexico, and two in Central and South America. Goldcorp has repeatedly been accused of harming the environment, livestock, and public health in multiple studies, contaminating areas with toxic heavy metals by its mining activities. Wikipedia.
Henning J.,Goldcorp |
Mitri H.,McGill University
International Journal of Geotechnical Earthquake Engineering | Year: 2010
This paper examines stope design approaches employed at a metal mining operation in Canada for extraction of transverse primary, transverse secondary, and longitudinal stopes. Variations in stope and slot design, blast design, and blast vibration attenuation are presented in detail. It is shown that the type of blasthole stoping technique employed varies according to stope sequence and ore zone width. Within this range of stopes, blasting design practices have been standardized in terms of drillhole diameter, powder factor, and the type and pattern of the explosives used. Copyright © 2010, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited.
Wyman D.A.,University of Sydney |
Hollings P.,Lakehead University |
Lithos | Year: 2011
Attempts to decipher the petrogenesis of Archean Trondhjemite-Tonalite-Granodiorite (TTG) and establish trends in their compositions over time typically do not assess the possible role of assimilation-crystal fractionation processes. Studies of TTG suites worldwide, however, demonstrate that reprocessing of older crust is common. Felsic volcanic and intrusive rocks from the North Caribou Lake area, located in the nucleus of the Superior Province, exhibit a range of compositions that are not accounted for by variable degrees of amphibolite melting alone. Characteristic of Archean TTG, the rocks mainly fall in the lower right hand quadrant of a Nb/Ta vs Zr/Sm plot but they also show clear trends between εNdT and ratios such as Al2O3/TiO2, Th/Nb, [Tb/Yb]N and Eu/Eu*. The lowest Nb/Ta values in the TTG likely result from crystal fractionation including titanite, which strongly partitions and fractionates these elements. © 2010 Elsevier B.V.
Emad M.Z.,McGill University |
Mitri H.S.,McGill University |
International Journal of Mining, Reclamation and Environment | Year: 2012
Blast vibrations are considered among the primary factors in destabilising cemented rockfill (CRF) stopes in open stoping systems with delayed backfill. This destabilisation occurs when the backfill face is subjected to blasting of an adjacent stope. Inadequate cementation, backfilling practices and blasting of adjacent stopes can be the causes of CRF failure and hence ore dilution. Poor blasting practices can cause greater blast vibrations and therefore can initiate fill failure. The magnitude of blast vibrations can be controlled by the powder factor and blast design. This study presents the effects of blast vibrations on CRF backfilled stopes. The effect of different blast loads and profiles are examined. Blast loads corresponding to non-ideal blasting are also simulated. © 2012 Copyright Taylor and Francis Group, LLC.
IMPC 2014 - 27th International Mineral Processing Congress | Year: 2014
Already starting, new drivers will dictate how future mineral processing plants will be designed and operated. These drivers include requirements in water and energy conservation because of rising costs, larger demand for mineral and metal products as the result of a rising population, and the increasing demand from the population in general to have influence over what type of operations will be developed where. Mineral operating facilities will require processing of lower grades. To do this economically, design engineers will be influenced to introduce newer concepts, or return to older processing concepts once deemed not desirable. Our understanding of the fundamentals must be improved, and this may come from better measurement techniques and more process piloting, and will go in hand with a reduction of waste generated during the process, improved separation of minerals or product size. Process engineers will also be required to not just design according to the established 3D methodology for efficient plant installation. Already in other industries the design concept encompasses the entire range from source to product. Not only that, the design will be affected by public influence that must be illustrated prior to project execution. On the one hand, the added dimension in design may slow a project; on the other hand it may result in a blessing, and in a higher responsibility for engineering.
49th US Rock Mechanics / Geomechanics Symposium 2015 | Year: 2015
Low quality rock is encountered in many manifestations in underground hard rock mines, ranging from weak and poorly consolidated rock to highly altered or foliated rock. Lateral mine developments driven in low quality rock pose on-going challenges to a mine operator, as ground stability issues, such as caving of under-supported ground, drift closure due to surface deformation or buckling processes, and degradation of exposed rock surfaces are a persistent concern. For many operators, ground support design is an iterative process, as support practices are refined with time. This paper presents case examples of a rationales used to develop a support strategy for an isolated drift within squeezing Talc-Schist rock at depth. Field observations, numerical modelling simulation, and trials of a variety of support systems were used to assess conditions and to establish a path forward for long term stability. Copyright 2015 ARMA, American Rock Mechanics Association.