Optimization of ring blasting in sublevel stoping gold mine
Keywords:
drilling and blasting; ring blasting; sublevel stoping; fragmentation;
Abstract
Important parameters that describe successful sublevel stoping operation are optimal fragmentation and low damage of rock mass around stopes. In current state of operation fragmentation of blasted material is not optimal since high percentage of fragments are oversized which requires additional sizing. Also, excessive damage of surrounding rock mass is found. By proposing new blasting pattern with slightly increased amount of drilling, but with decreased hole diameter decrease of explosive usage is obtained for more than 100kg. Along with better charge distribution it is expected that rock mass damage is to be decreased as well.
References
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ESEN, S., ONEDERRA, I. and BILGIN, H. A. (2003) Modelling the size of the crushed zone around a blasthole. International Journal of Rock Mechanics and Mining Sciences, 40, pp. 485-495.
FULLELOVE, I., ONEDERRA, I. and VILLAESCUSA, E. (2016) Empirical approach to estimate rock mass damage from long hole winze (LHW) blasting. Mining Technology, 126, 34-43.
GOODARZI, M., MOHAMMADI, S. and JAFARI, A. (2015) Numerical analysis of rock fracturing by gas pressure using the extended finite element method. Petroleum Science, 12, pp. 304-315.
OLSSON, M. and BERGQVIST, I. (1996) Crack lengths from explosives in multiple hole blasting. In: Proceedings of the Fifth International Symposium on Rock Fragmentation by Blasting, Fragblast-5, Montreal, Quebec, Canada, pp. 187-91. Monteral.
ONEDERRA, I. A. and CHITOMBO, G. (2007) Design methodology for underground ring blasting. Mining Technology, 116 (4), 180-195.
TORBICA, S. and LAPCEVIC, V. (2014a) Rock breakage by explosives. European International Journal of Science and Technology, 3, pp. 96-104.
TORBICA, S. and LAPCEVIC, V. (2014b) Model for estimating blasted rock fragmentation. In: Proceedings of 14th SGEM GeoConference on Science and Technologies In Geology, Exploration and Mining. Albena, June 19-25. Albena: SGEM: Surveying Geology & mining Ecology Management, pp. 379-386.
TORBICA, S. and LAPČEVIĆ, V. (2015) Estimating extent and properties of blast-damaged zone around underground excavations. Rem: Revista Escola de Minas, 68(4), pp.441-453.
TORBICA, S. and LAPČEVIĆ, V., (2016a) Fragmenting of cylindrical rock specimens under explosive load: Comparison between model and laboratory results. Mining and Metallurgy Engineering Bor, 1, pp.103-114.
TORBICA, S. and LAPČEVIĆ, V. (2018) Rock fracturing mechanisms by blasting. Podzemni radovi, (32), pp.15-31.
TORBICA, S. and LAPČEVIĆ, V. (2016b) Blast-induced damage and its impact on structural stability of underground excavations. Podzemni radovi, (29), pp.33-42.
WANG, M., SHI, X. and ZHOU, J. (2018) Charge design scheme optimization for ring blasting based on developed Scaled Heelan model. International Journal of Rock Mechanic and Mining Sciences, 110, 199-209.
ESEN, S., ONEDERRA, I. and BILGIN, H. A. (2003) Modelling the size of the crushed zone around a blasthole. International Journal of Rock Mechanics and Mining Sciences, 40, pp. 485-495.
FULLELOVE, I., ONEDERRA, I. and VILLAESCUSA, E. (2016) Empirical approach to estimate rock mass damage from long hole winze (LHW) blasting. Mining Technology, 126, 34-43.
GOODARZI, M., MOHAMMADI, S. and JAFARI, A. (2015) Numerical analysis of rock fracturing by gas pressure using the extended finite element method. Petroleum Science, 12, pp. 304-315.
OLSSON, M. and BERGQVIST, I. (1996) Crack lengths from explosives in multiple hole blasting. In: Proceedings of the Fifth International Symposium on Rock Fragmentation by Blasting, Fragblast-5, Montreal, Quebec, Canada, pp. 187-91. Monteral.
ONEDERRA, I. A. and CHITOMBO, G. (2007) Design methodology for underground ring blasting. Mining Technology, 116 (4), 180-195.
TORBICA, S. and LAPCEVIC, V. (2014a) Rock breakage by explosives. European International Journal of Science and Technology, 3, pp. 96-104.
TORBICA, S. and LAPCEVIC, V. (2014b) Model for estimating blasted rock fragmentation. In: Proceedings of 14th SGEM GeoConference on Science and Technologies In Geology, Exploration and Mining. Albena, June 19-25. Albena: SGEM: Surveying Geology & mining Ecology Management, pp. 379-386.
TORBICA, S. and LAPČEVIĆ, V. (2015) Estimating extent and properties of blast-damaged zone around underground excavations. Rem: Revista Escola de Minas, 68(4), pp.441-453.
TORBICA, S. and LAPČEVIĆ, V., (2016a) Fragmenting of cylindrical rock specimens under explosive load: Comparison between model and laboratory results. Mining and Metallurgy Engineering Bor, 1, pp.103-114.
TORBICA, S. and LAPČEVIĆ, V. (2018) Rock fracturing mechanisms by blasting. Podzemni radovi, (32), pp.15-31.
TORBICA, S. and LAPČEVIĆ, V. (2016b) Blast-induced damage and its impact on structural stability of underground excavations. Podzemni radovi, (29), pp.33-42.
WANG, M., SHI, X. and ZHOU, J. (2018) Charge design scheme optimization for ring blasting based on developed Scaled Heelan model. International Journal of Rock Mechanic and Mining Sciences, 110, 199-209.
Published
2018-12-31
How to Cite
Duranović, M., Đokić, N., Lapčević, V., Torbica, S., Petrović, M., & Savić, L. (2018). Optimization of ring blasting in sublevel stoping gold mine. Podzemni Radovi, (33), 61-68. https://doi.org/10.5937/PodRad1833061D
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