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Regression Models of the Impact of Rockmass and Blast Design Variations on the Effectiveness of Iron Ore Surface Blasting

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DOI: 10.4236/eng.2011.31007    5,351 Downloads   9,783 Views   Citations

ABSTRACT

The desired economics of hard rock surface mining is mainly determined by the parameters of process design which minimize the overall cost per tonne of the rock mined in drilling, blasting, handling and primary crushing in given rockmass conditions. The most effective parameters of process design could be established based on the regression models of the cumulative influence of rockmass and mine design parameters on the overall cost per tonne of the rock drilled, blasted, handled and crushed. These models could be developed from the huge data accumulated worldwide on the costs per tonne of hard rock surface mining in drilling, blasting, handling and primary crushing vs the parameters of rockmass and mine design. This paper only dwelt on the development of regression models for oversize generation, blasthole productivity and blasting cost for iron ore surface mines, whose data is available. The SPSS standard statistical correlation – regression analysis software was used in the analysis. Interpretation of the models generated shows that the individual effects of the determinant rockmass and blast design parameters on oversize generation, blasthole productivity and blasting cost are all in compliance with the findings of other researchers and the theory of explosive rock fragmentation and could be used for the estimation of oversize generation, blasthole productivity and blasting cost in rockmass and blast design conditions similar to those of the iron ore surface mines examined in this study. However, the regression models obtained here could not be used alone for the optimization of blast design because most of the determinant parameters also have conflicting effect on the other processes of drilling, handling and primary crushing the blasted rock. Also, the quality and content of the regression models could be enhanced further by increasing the content of rockmass and blast design parameters and the volume of data considered in the regression analysis.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

A. Massawe and K. Baruti, "Regression Models of the Impact of Rockmass and Blast Design Variations on the Effectiveness of Iron Ore Surface Blasting," Engineering, Vol. 3 No. 1, 2011, pp. 55-62. doi: 10.4236/eng.2011.31007.

References

[1] F. A. Avdyeev, V. L. Baron, N. V. Gurov and V. X. Kantor, “Drilling and Blasting Specifications Handbook,” Nedra, Moscow, 1986.
[2] B. Bahman, “The Effects of Geological Parameters onRock Blasting Using the Hopkinson Split Bar,” International Journal of Rock Mechanics and Mining Sciences, Vol. 34, No. 3-4, April-June 1997, pp. 32.e1-32.e9. doi:10.1016/S1365-1609(97)00228-1
[3] L. J. Carlos, L. J. Emilio and J. A. C. Fransisco, “Drilling and Blasting of Rocks,” Balkema, Rotterdam, 1995.
[4] Department of the Army-U.S. Army Corps of Engineers, “Engineer Manual/Engineering & Design/Systematic Drilling and Blasting for Surface Excavations,” EM1110- 3800, Washingtonne D.C., 1 March 1972.
[5] C. H. Dowding and C. T. Aimone, “Rock Breakage: Explosives,” SME Mining Engineering Handbook, Sacramento, 1992.
[6] M. F. Drukovani, L.V. Dubnov, B. N. Kutuzov and I. Efremov, “Surface Drilling & Blasting Handbook,’’ Naukova Dumka, Kiev, 1973.
[7] R. Gustafson, “Swedish Blasting Technique (Russian translation),” Nedra, Moscow, 1977.
[8] V. S. Harikov, “Surface Mining of Mineral Resource Deposits,’’ Nedra, Moscow, 1982.
[9] J-P Latham and P. Lu., “Development of an Assessment System of Blastability for Rock Masses,’’ International Journal of Rock Mechanics and Mining Sciences, Vol. 36, No. 1, January 1999, pp. 41-55. doi:10.1016/S0148-9062 (98)00175-2
[10] B. N. Kutuzov, “Blasting Works,” Nedra, Moscow, 1988.
[11] B. N. Kutuzov, B. I. Komashenko, B. F. Noskov, C. B. Gabrahamov and A. A. Muzirkov, “Lab and Practical Exercises in the Ex-plosive Breakage of Rocks,’’ Nedra, Moscow, 1981.
[12] A. T. S. Massawe, “Drilling & Blasting Part I: Blasting Manual,” LAP LAMBERT Academic Publishing AG & Co.KG, Saarbrucken, 2010.
[13] A. G. Protosenya, C. A. Kulish, E. I. Azbel, K. D. Naumenko, V. B. Sivui and B. Z. Bezmozgin, “Mathematical Methods and Models in Mining Production Planning and Control,” Nedra, Moscow, 1985.

  
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