586 4TH CAN. PERMAFROST CONF. (1982) Recently developed blasting techniques in frozen iron ore at Schefferville, Quebec
area since 1970, considerable improvements have been made related to the blasting of frozen ore and waste material. The major areas of improvements are the following: (a) Prediction on the three-dimensional distribution of permafrost for each mining area; (b) An improved dewatering program and use o...
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.585.1202 http://pubs.aina.ucalgary.ca/cpc/CPC4-586.pdf |
| Summary: | area since 1970, considerable improvements have been made related to the blasting of frozen ore and waste material. The major areas of improvements are the following: (a) Prediction on the three-dimensional distribution of permafrost for each mining area; (b) An improved dewatering program and use of liners in the blast holes; (c) Determination of rock properties in the laboratory and in the field using seismic techniques; and (d) Simulation of blast designs using a computer program. This reduces the number of experimen-tal blasts which would otherwise have to be done in the field using the trial and error approach. Considerable savings have been realized in the unit cost of blasting in permafrost areas of the mining Specific topics where further research work is required are also discussed briefly. operation as a result of the research program. Suite a un programme de recherches realisks dam la region de Schefferville par la Compagnie Iron Ore du Canada depuis 1970, des ameliorations considerables ont ete apportkes dans le domaine du dynamitage des minerais et des residus gel & Les principales ameliorations sont les suivantes: Prevision de la repartition tridimensionnelle du pergelisol dans chaque region miniere; Programme d'asskhement ameliort et utilisation de garnitures dans les trous de mine; Determination des propriktts de la roche en laboratoire et sur le terrain au moyen de techniques sismiques; Simulation de plans de dynamitage par un,programme d'ordinateur, permettant de rCduire le nombre d'explosions experimentales qui seraient par ailleurs necessaires sur le terrain par la mkthode d'essais et d'erreurs. Ce programme de recherches a, par consequent, permis des economies considerables au niveau du Les domaines particuliers dans lesquels des travaux de recherche supplementaires sont necessaires a) b) c) d) cotit unitaire du dynamitage dans les exploitations minitres en regions de pergelisol. sont egalement brikvement abordes. Proc. 4th Can. Permafrost Conf. (1982) |
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