Assessment of the European bucket-wheel excavator technology, Mine Visits—May 15 to May 31, 1982

Mots clés : Open-pit mining;Europe;Excavat excavators;Belt conveyors;Belt bridges;Stackers
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Sommaire: This paper describes the use of electronics for physical measurement and computer analysis in both open-pit and underground mining operations for the ultimate purpose of optimizing production blasts. Techniques in monitoring single borehole blasts using both pressure and vibration sensors to establish in-situ dynamic rock properties are outlined, including characterization of multiple borehole production blasts with regard to stress generation.
Once field derived measurements are computer...
Publication: CIM Bulletin
Auteur(s): CHRISTOPHER J. PRESTON, NORMAN J. TIENKAMP
Mots clés: Open-pit mining, Blast monitoring, Optimization, Seismic monitoring, Computer simulation
Numéro: 867
Volume: 77
Année: 1984
Texte
Sommaire: Sequential blasting has been introduced at Mines Gaspe to reduce the harmful effects associated with the instantaneously primed blasting method. Three stages of modifications had been tried to improve this method: trials of a rectangular pattern instead of the square one, trials of lengthened hole collars at the perimeter of the blast and trials of increased inter-row delay intervals from 35 to 50 ms. Results showed that improvements to the instantaneously primed blasting method were limited...
Publication: CIM Bulletin
Auteur(s): ROBERT J-M ETHIER
Mots clés: Open-pit mining, Blasting, Sequential blasting, Drilling, Computer simulations, Loading
Numéro: 867
Volume: 77
Année: 1984
Texte
Sommaire: All optimum pit design studies start from the geological ore reserves inventory, the estimated grades of all blocks of potential ore within the interpreted limits of the deposit. The actual optimization procedure is then carried out on block valuations based on these estimated grades. Thus, the relevance of any pit design can be seen to depend directly on the ore reserve estimation. To insure a proper pit design, a first step would be to use a geostatistical reserve estimation technique such...
Publication: CIM Bulletin
Auteur(s): ALEXANDRE DESBARATS, MICHEL DAVID
Mots clés: Open-pit mining, Geostatistics, Optimum pit design, Selective mining, Kriging, Parametrization
Numéro: 867
Volume: 77
Année: 1984
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