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Assessment of velocity of detonation at kumtor open pit gold mine
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Date
2011
Author
Düzgün, Özkan
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One of the most important properties of an explosive is its velocity of detonation (VOD). It is essential that the explosive should detonate at its optimum rate and release sufficient detonation pressure to get good fragmentation under the existing field conditions. The main objectives of this research study are to investigate the effects of explosive type, blast hole diameter, and degree of confinement on the VOD of bulk ANFO and bulk emulsion in Kumtor Open Pit Gold Mine. In this study, the continuous resistance wire method is employed to measure in-situ VOD of both bulk ANFO and bulk emulsion. The VOD values are measured for different hole diameters and under different confinements for both explosives. The ideality of bulk ANFO and bulk emulsion is calculated by comparing the in-situ measured VOD’s and their ideal detonation values. It is found that the VOD of both explosives increases as the blast hole diameter and the degree of confinement increases. In addition to this, VOD of bulk ANFO decreases when it gets wet in the blast hole. Another finding is that, proportion of bulk emulsion ingredients has influence on its VOD. This research study provides a good understanding to use suitable explosive in existing rock conditions in Kumtor Open Pit Gold Mine.
Subject Keywords
Mining Engineering.
,
Metallurgy.
URI
http://etd.lib.metu.edu.tr/upload/12613676/index.pdf
https://hdl.handle.net/11511/21051
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Graduate School of Natural and Applied Sciences, Thesis
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Ö. Düzgün, “Assessment of velocity of detonation at kumtor open pit gold mine,” M.S. - Master of Science, Middle East Technical University, 2011.
