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Les Mines Inmet ? La Division Troilus exploite une mine d?or à ciel ouvert depuis 1996 et produit un concentré de cuivre. La Division Troilus est localisée à 175 KM au nord de la ville de Chibougamau? au 51 parallèle.

Feb 1, 2008

By M. Hall

"SomarioEl circuito de molienda a Selbaie consta de molino semiaut6geno en un circuito cerrado y molino de balas en un circuito cerrado. El amperaje del motor de se usa controlar el tonelaje el molino. Este sistema estabiliza el circuito pero no mejora activamente el rendirniento del circuito. Se desarroll6 auxiliar el rendimiento del circuito un sistema experto en manipular las objetivos de existir control proporcional-integral. Se ejecut6 el sistema con el Comdale /C conjunto del sistema experto y ha side funcional hace tiempo el mayo de 1992. El sistema experto ha resultado en un aumento en tonelaje de 7tph y una disminuci6n de $210,000 en el caste anual de media de molienda. Se describe el desarrollo del sistema y los provechos derivar se presenta.AbstractThe grinding circuit at Selbaie consists of SAG mill and ball mill closed circuit grinding. The SAG mill motor current is used to control throughput. This system stabilizes the circuit but does not actively optimize circuit performance. An expert system was developed to aid the optimization of the circuit by manipulating the set-points of existing PI control loops. The system was implemented with the Comdale /C expert system package and has been on line since May 1992. The expert system has resulted in a net increase in tonnage of 7tph and a decrease in annual grinding media costs of $210,000. The system development is described and the benefits derived are presented."

Jan 1, 1994

By Ken Wood, Luc Duval

"The development and operation of the milling circuits treating the different Selbaie orebodies are discussed in this paper. The project is reviewed from metallurgical evaluation through construction to present operating status. The current flowsheets are described, with discussion of some unusual features.IntroductionThe Selbaie concentrator commenced initial production in August 1981, treating underground B zone copper ore in a single 1500 t/d circuit. Throughput was increased to 1650 t/d in 1985. The mill was expanded in 1986 to treat ore from the A-I zone open pit; an independent circuit was added to selectively treat 5000 t/d of copper-zinc ore. Current total mill throughput through both circuits averages 7200 t/d with the production of approximately 270 t/d of copper concentrate and 230 t/d of zinc concentrate.This paper describes the stages involved in bringing the project from initial laboratory testing to its current status as one of the most important producers of silver, copper and zinc in Quebec and a major employer in the region."

Jan 1, 1990

By A. J. W. Law

"This paper deals with the organization of the central office technical areas and the role played during the feasibility studies, construction and operating phases of Les Mines Selbaie.HistoryThe Engineering Department was originally formed as a part of the Exploration Department, to examine the feasibility of advanced exploration prospects being brought to the company. In 1968, with the discovery of the South Bay property in northwestern Ontario, the department became part of a Mining Division and was expanded, so that it could provide more advanced mine feasibility studies, control of construction engineering and procurement and initial mine design. As is generally the case, the mine design function was handled with in-house capability, while plant, mill and const ruction functions used outside consultants.The 1974 discovery of the Selbaie deposits, started a period o f growth in the capabilities o f the department. The complex nature of these deposits, required that skills were added in the mining, metallurgical and plant areas. During the early feasibility study period these skills were provided by the engineering company of the parent group, but when it was realized that production from the deposits was likely, permanent staff was added."

Jan 1, 1990

By G. Begin

"The expansion undertaken at Selbaie in 1985 necessitated an adaptation and expansion of the equipment maintenance system. This paper relates briefly the stages of transformation of the maintenance administrative structures, work methods and tools. The maintenance in a mechanized mine requires an expenditure level in the order of 20% of the total operating cost of the enterprise. Thus, the maintenance organization was modified to apply more computerized planning and follow-up, and the role of preventative maintenance was further advanced.IntroductionAs far as maintenance is concerned at Selbaie, the scenario described herein is a resume of the current situation. Although positive results have been obtained, this outline is in no way a detailed account of a fail-proof maintenance system.Once zone A-I was put into production, the expansion the mine experienced in 1985 had a direct impact on the equipment maintenance system. As centralized as it was in the beginning, the system is now partially decentralized.The over-all changes to the maintenance department demonstrate the flexibility required by organizations in new situations. In spite of the exceptional results obtained before the expansion, it became evident that both the maintenance and production sectors would have to be combined. In doing so, a more appropriate coordination of maintenance work could be obtained and the maintenance staff would obtain a more detailed knowledge of the equipment in each sector. In addition, by keeping the general and specialized departments centralized, it was possible to offset the negative effect s of a decentralized system, namely too much manpower."

Jan 1, 1990

By J. J. Bouillon

"Located in the northwestern portion of the Abitibi greenstone belt, Les Mines Selbaie is a copper-zinc (silver and gold) producer. Felsic tuffs host three are zones. Composed of sulphide veins and breccias, they are not exhalative massive sulphide deposits, except, probably, for the massive pyrite (fragments and lenses) localized close to the top of the volcanic sequence.The total of all (mineable and mined) ore in the three zones presently outlined on the property, is of the order of 29.9 x 106 tonnes with average grade of 0.63 g/t Au, 37.02 g/t Ag, 1.21% Cu, 1.91% Zn.The ore reserve calculations and the daily production procedures are computerized to various degrees. The data handling process is highly computerized.Various geophysical methods are, and have in the past, been successfully used on the property. The ""mise-à-la-masse"" surveys were used to perform the geological interpretation of an underground deposit (A-2 zone). Presently the PULSE-EM surveys are performed in all surface and underground exploration drill holes."

Jan 1, 1990

By R. C. Bryce

"Selbaie is located northwest of Joutel, in what is known as the fourth east-west volcanic sediment group in northwestern Quebec. The main metals produced are copper and zinc, with important contents of both silver and gold. Production comes from an open pit mine on the A-I zone and from two underground mines on the B zone and the A-2 zone. Each mine gave rise to important capital investment programs for construction and mine development, all of which were managed and staffed with company-hired, non-union personnel. Production from all sources now exceeds 7000 tonnes per day, with a workforce of540 regular employees. Of particular interest technically is the high recovery of B zone reserves underneath 40 m of overburden cover, the low-cost capital development of the A-2 zone, the computerized control of open pit mining, and the successful copper-zinc separation of the A-1 zone ore. Due to the low grades of the mineral deposits, efficiency in all aspects of the production process, is essential to the success of the operation.LocationThe Selbaie Mine is located 82 km northwest of the locality of Joutel in northwestern Quebec (Fig. 1). Access to the mine is by an all-weather road, 32 km of which is paved. A second road access to the site is via La Sarre, 134km to the southwest. Employee access, materials transport and haulage of copper and zinc concentrates take place over both of these roads."

Jan 1, 1990

By Deni Pageau, Deni Caron

"This paper describes the operations of the open pit and emphasizes particular aspects of Les Mines Selbaie. The open pit as well as its related services were incorporated into a complex which includes an underground mine and a concentrator. The equipment was chosen with the objective of auto-sufficiency during each phase of mining. The paper outlines the organization and the methods used in each step of mining, notably: drilling, blasting, loading, transporting and crushing. The responsibilities of the Engineering Department are also outlined from the conception of the open pit to the latest follow-up methods. A short resume of the results which have been obtained as well as suggestions for improvement are provided.Layout in Consideration of Main SiteThe A-I zone deposit is located I km from 8 zone. Open pit mining of A-I zone required the regrouping of different services to those already existing.I. The crusher was placed in an area close to the concentrator in order to minimize the length of the conveyors and to provide space for the crushed ore reserves (50000 tonnes).2. The location of the service building (warehouses, mine offices, maintenance, engineering and geology) raised a few problems. Because of the multiple services provided therein , it was impossible to fulfill all the requirements, and the garage in itself is located a fair distance from the pit. Added to this inconvenience is the fact that heavy equipment regularly travels throughout the main yard.3. The storage of explosive magazines has been changed to obtain more surface space and meet government regulations.4. A space has been provided for minor repairs in the garage used during exploration. A trailer was installed next to the garage to provide a lunch room for the employees working at the open pit."

Jan 1, 1990

By R. C. Bryce

"Accident prevention has been an on-going priorty for five years. In 1987, adherence to the ILCI five-star rating loss control program was started, and a first star was awarded. Extensive training programs have been undertaken to establish standard procedures and upgrade employee skills. Due to its location, Selbaie owns and rents housing in the town of Joutel and contracts a busing service to and from the mine. Employees from other areas are lodged in dormitories and fed in the site dining room. Accounting and warehousing services are carried out in efficient fashion. Employee relations are structured to provide prompt resolution of complaints and differences. No lost time due to industrial relations differences has been encountered during the history of the mine.Safety and Loss ControlAll mines are concerned and occupied with a wide range of activities to ensure the safety of its employees. Selbaie is no exception. Programs to achieve success in safety and loss control have been implanted since the start of construction and development at Selbaie and have followed three interesting stages of evolution."

Jan 1, 1990

By Yve Fourmanoit

"This paper discusses the exploitation of shallow underground deposits in a very altered geological environment. The methods, their adaptation to local conditions, their evolution, dilution control and recovery of mineral reserves will all be dealt with.The recovery of the B zone crown pillar under 40 m of till that was originally saturated with water, is of particular interest.Future underground development and production start-up of the A-2 zone, organization of mining operations, mechanical services, group incentives and safety practices will also be given.IntroductionThe underground deposit of B zone is not very deep. A 300 m shaft provides access to the mine. In addition , exploitation sublevels are developed every 20 m and are linked by a service ramp. The overburden located on top of the deposit is 40 m thick and is composed of a very dense till.A detailed work plan was initiated to permit mining under the overburden. To do so, it was imperative that efficient methods be developed. At a time when an accident at the Belmoral Mine shook the mining world , it was a task to convince provincial authorities that it was safe.While B zone was being mined , development began in the A-2 zone deposit which has recently been put into production (Figs. 1 and 2).The intention of this paper is to provide an outline of the mining method s and their particular aspects. To do so, some of the mine services are described and a brief outline of the under ground department is provided."

Jan 1, 1990

By Henri-Louis Jacob et Marc Bélanger

La province de Québec est un important producteur de roches et de minéraux industriels. En 1998, la valeur de cette production se chiffrait à 1,26 milliard de dollars canadiens (données préliminaires). Les minéraux industriels produits comprenaient: l'amiante extraite des gisements de chrysotile associés aux complexes ophiolitiques de Thetford Mines et d'Asbestos; l'ilménite et les scories enrichies en titane produites à partir du gisement d'ilménite massive du lac Tio associé au complexe anorthositique du lac Allard; le talc produit dans la région de Thetford Mines, à partir des roches à talc-carbonates associées à des feuillets de serpentinite; le mica broyé produit à partir de l'intrusion de suzorite du lac Letondal; le graphite en paillettes extrait du gisement du Lac-des-Îles; la wollastonite extraite d'une zone de skarn dans un lambeau de roches métasédimentaires enclavé dans le massif d'anor-thosite du LacSaint- Jean; le sel extrait aux Îles-de-la-Madeleine d'un gîte associé aux évaporites du Croupe de Windsor. Les nombreuses carrières dans le sud du Québec produisent, en plus de la pierre concassée, diverses substances incluant la pierre dimensionnelle (granite surtout); le calcaire pour la chaux, le ciment ainsi que divers usages industriels; la silice extraite à partir de formations de grès ou de quartzite. Le Québec est aussi un important producteur de tourbe de sphaignes qui est extraite de vastes tourbières qui se sont formées un peu partout dans le sud du Québec à la suite de la dernière glaciation. Les autres ressources en minéraux industriels comprennent des gîtes déjà exploités de brucite, de chromite, de magnésite dolomitique et de feldspaths ainsi que des gîtes de magnésite, de barytine et d'apatite faisant présentement l'objet d'évaluation.

Jan 1, 2001

By Henri-Louis Jacob

Le Québec dispose de ressources en silice abondantes et diversifiées, pouvant convenir dans l'ensemble à la plupart des usages industriels. Dans les terrains Paléozoïques des BassesTerres du Saint-Laurent et des Appalaches, les ressources identifiées comprennent les grès quartzitiques purs du Croupe de Potsdam (Cambrien), exploités notamment à Saint Canut au nord de Montréal comme source de sable de silice pour l'industrie du verre; les arénites quartzitiques des Formations de Val-Brillant (Silurien moyen) et de Kamouraska (Ordovocien inférieur) exploitées dans l'est du Québec comme source de fondant métallurgique; les grès friables de la Formation de Guigues (Ordovicien) au Témiscamingue, à partir desquels on produit des sables de silice utilisés notamment en fonderie et en filtration. Dans la province structurale du Grenville, au nord du fleuve Saint-Laurent, les métaquartzites purs du Supergroupe de Grenville représentent une source importante de silice pour la production de silicium, de ferro-silicium et de carbure de silicium. Des veines et amas de quartz ont aussi été exploités un peu partout au Québec comme source de fondant métallurgique ou de silice ultra-pure pour la production de silicium métal. Quelques dépôts de sables naturels, généralement d'origine marine ou deltaïque sont finalement exploités dans la région de Montréal comme source de sable pour des usages n'exigeant pas un produit de haute pureté.

Jan 1, 2001

By S. Dallaire

"RÉSUMÉLes revêtements céramiques ont une moins grande visibilité que les revêtements métallurgiques. Ils ont cependant jour un role significatif dans noire développement technologique. Les procédés de revêtement ont permis de s'affranchir de barrières technologiques importantes dans le domaine de l'optique, de l'électronique, de l'usure, des hautes temperatures. L'introduction de nouvelles technologies ou la mise en service de nouveaux matériaux peut nécessiter l'adaptation de certain procédés actuels ou le recours a des procédés qui ont peu percé jusqu’ à maintenant.ABSTRACTApplications concerned with ceramic coatings are not as well known as those with metallic coatings. However, ceramic coatings have played a tremendous role in the development of technology. Ceramic coating processes made it possible to overcome technological barriers in the areas of optics, electronics, wear resistance and high temperature applications. Ceramic coatings can provide new properties to materials never considered for demanding applications. They can also open new frontiers and revitalize materials which are maturing or in decline."

Jan 1, 1990

By R. Knapp, R. Firlotte

"Les Terrains Auriferes (LIA) Property, formerly the Malartic Goldfield (Goldfield) mine, ceased its remaining milling operations in the fall of 1994. During the early years of mining, the mill processed a non-sulfide ore with substantial carbonate mineralization.In 1977 after an extended shutdown period, ore from a nearby property, Bousquet, was processed at the mill. That ore contained larger quantities of sulfides, and unlike the old tailings, had acid generating potential.Upon closure of the L TA mill, the closure options considered for the L TA site were to cover with:1. a thin cover of 0.5 metres of borrow material (sand and gravel) to achieve basic erosion protection/stabilization; collect acidic seepage and treat with lime.2. a 2 metres of non-acid producing tailings; final surface to be vegetated.3. an engineered oxygen barrier consisting of a multi-layer cover; final surface to be vegetated.The paper presents the technological and economical methodologies that were used to select the closure alternative, describe the associated construction challenges that were faced with the implementation of the multi-layer cover concept and presents preliminary results on the cover's performance.In addition to being the first full scale demonstration of this type of multi-layer engineered oxygen barrier cover technology, this project had the advantage of using non acid producing mine tailings as part of the reclamation solution."

Jan 1, 1997

By Richard J. Kolada, Ian R. Muirhead

"This paper reports on a CANMET-funded examination of less conventional underground coal mining methods. These methods are documented and those that show the most promise for application to western Canadian conditions are discussed in detail.IntroductionIn recent years, mining considerations and economics have encouraged a transition from underground mining to surface mining. However, a change in market conditions or the development of superior underground mining methods may reverse this trend . Should this happen, the industry must be quick to respond and have information available on the latest developments of underground mining technology. In time, deposits of high-quality coal, which are easily accessible to surface mining, will be depleted and a change to underground mining methods will require consideration. The economic transition point between surface to underground will be a major determinant in maintaining a competitive edge. For these reasons, it is important to keep abreast of improvements in underground mining methods. To meet this objective, CANMET awarded a research contract to Monenco Consultants Limited, to investigate unconventional underground mining methods that show a potential for western Canadaoi. This paper presents the results of this investigation."

Jan 1, 1988

By Erik Richer La Fleche

LEGAL RISKS LEGAL RISKS ARE COUNTRY RATHER THAN PROJECT RISKS OTHER COUNTRY RISKS ARE POLITICAL AND MACRO-ECONOMIC RISKS COUNTRY RISKS ARE EXAMINED AFTER PROJECT RISKS COUNTRY RISKS COUNTRY RISKS INCLUDE: WAR AND ARMED CONFLICT TERRORISM AND SABOTAGE CURRENCY INCONVERTIBILTY AND TRANSFER NATIONALIZATION AND CREEPING EXPROPRIATION GOVERNMENTAL BREACH AND REPUDIATION OF CONTRACT CHANGE OF GOVERNMENT CORRUPTION COUNTRY RISKS FIRST NATIONS AND LANDOWNER CLAIMS LABOUR UNREST SINGLE CAUSE ACTIVISTS REGULATORY AND BUREAUCRATIC DELAYS CONFLICT BETWEEN GOVERNMENT LEVELS ETHIC AND RELIGIOUS TENSIONS INTERNATIONAL SANCTIONS TAXATION CHANGES CHANGES IN LAW

May 1, 2013

By Ivor da Cunha

Ontario Mining Association (OMA) represents 57 members that are engaged in exploring, producing & processing mineral resources in an environmentally responsible manner. Conservation Bureau at the Ontario Power Authority (OPA) develops, coordinates and stimulates commitment to electricity conservation and demand management programs ? OMA selected compressed air optimization for high impact cost savings and energy efficiency potential ? Ontario Power Authority (OPA) provided $218k funding for $532k project ? Commenced summer 2006, Final Report June 2007 ? Three representative sites participating: ? Williams, CVRD Inco & FNX McCreedy ? Different levels of energy management ? Small, medium and large mining operations ? Different corporate practices and culture

May 1, 2007

By Nehad Elsafty

It is always necessary to expand existing buildings, so that they could meet the growing societal needs. Compared with demolishing them and then constructing new ones, the expansion of existing buildings could not only reduce project cost, but also save the use of energy and raw materials in projects. Therefore, it is widely adopted in most under-developed countries. However, the expansion of existing buildings is not an easy task. It has been involved with a lot of issues in defining the scope of work, planning landscape, managing construction activities, etc. This paper investigates the potential challenges in expanding existing buildings. The project of expanding the Al-Agoza Hospital, one of the biggest and oldest hospitals in Cairo, Egypt, is selected as a case study. In the case study, the project documents have been carefully reviewed. The project engineers and the health-care professionals working in the hospital have been interviewed. This way, the point of views from the owner, the architect/engineer, and the contractor have been taken into account. Several lessons are learned through the discussion with these people. The results from this paper are expected to provide pieces of useful advice and suggestion for the expansion of existing buildings in the future.

Aug 1, 2013

By Ian Thomson

The Social License to Operate ? We are operating in an era where social license in the resource industry is as important ? if not more important ? than mineral potential ? Concept proposed by Placer Dome executive Jim Cooney in 1997 as essential requirement for the future survival of the mining industry ? ?You don?t get your social license by going to a government ministry and making an application or simply paying a fee? It requires far more than money to truly become part of the communities in which you operate.? Pierre Lassonde, President of Newmont Mining Corporation (2003). What it is ?Granted by the local community ? Intangible, informal, non-permanent ? Has to be earned and then maintained ? Defined as ? Ongoing Acceptance (a lower level) ? Ongoing Approval (a higher level) ? Expression of the quality of the ?relationship?

Aug 1, 2013

By T. V. Nethery

Introduction A brief account of the East Malartic fire is essential if this paper is to serve the purpose implied by its title. The fire originated in the timbers of No. 4 shaft at the 10th, or 1,570-foot, level; this was the top or collar of the underground sinking operations. At the time, sinking was in progress and the shaft bottom was 242 feet below the 12th station horizon, or 618 feet 'below the l0th level. Above the l0th level, the shaft was not in use as the surface plant was not yet completed. The shaft crews descended from surface in No. 3 vertical shaft to the l0th level, where they transferred to No. 4 shaft, a distance of 1,450 feet. Of the sixteen shaftmen mucking at the shaft bottom, four were able to reach safety. One shaftman was overcome by fumes midway between the two shafts on the l0th level, while attempting his escape. The remaining eleven men climbed as far as the 11th station and there succumbed to carbon monoxide. No. 4 shaft, inclined at 61 degrees, bad been raised and timbered from the 10th level to surface; this bad been followed by sinking operations below the l0th. Two air hoists had been set up in the footwall of the shaft, 110 feet above the 10th level, and directly behind compartments No. 2 and No. 4. The waste from the shaft bottom was hoisted in 28-cubicfoot buckets on mono rails and dumped over standard shaft sinking doors into waste chutes built into No. 1 and No. 3 compartments. The five-compartment shaft, 7 ft. 8 in. by 34 ft. 6 in. overall size, was heavily timbered. In addition to the standard shaft timbers of 8 in. by 8 in. and 8 in. by 10 in. B.C. fir, the hanging-wall and ends of the shaft were laced with 4-inch spruce lagging. This represented approximately 300 board feet of timber in placee for every foot of shaft. The cause of the fire bas never been determined, despite every effort to do so. The inquest held for those who lost their lives in the fire was an extremely thorough one, but only the location of the origin, and not the cause, was established.

Jan 1, 1950