New techniques in blast monitoring and optimization

Abstract 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 analyzed, they are channelled as input parallel to other data, such as the explosives thermochemical performance properties generated by a sophisticated computer program called "HT-65" into BLASPA. BLASPA, a blast simulation computer program, then couples these input with a mathematical model which defines the blasting processes. Aspects such as the blast geometry, explosive loads and distribution, hook-up, and costs are studied. The final output table gives specific blast performance or quality factors for each blast procedure. These results are then easily compared and rapidly optimized to achieve maximum performance at lowest blasting and drilling cost.
Keywords: Open-pit mining, Blast monitoring, Optimization, Seismic monitoring, Computer simulation
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Publication: CIM Bulletin
Author(s): T.S. GOLOSINSKI, E. McROBERTS, W.F. GILMORE
Keywords: Open-pit mining, Europe, Excavat excavators, Belt conveyors, Belt bridges, Stackers
Issue: 867
Volume: 77
Year: 1984
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Summary: 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
Author(s): ROBERT J-M ETHIER
Keywords: Open-pit mining, Blasting, Sequential blasting, Drilling, Computer simulations, Loading
Issue: 867
Volume: 77
Year: 1984
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Summary: 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
Author(s): ALEXANDRE DESBARATS, MICHEL DAVID
Keywords: Open-pit mining, Geostatistics, Optimum pit design, Selective mining, Kriging, Parametrization
Issue: 867
Volume: 77
Year: 1984
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