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1 September 1987 The Detection And Analysis Of Blasting Problems Encountered In A Colliery Using High Speed Photography
A. J. Rorke, E. W. Kohler
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Proceedings Volume 0674, 17th Intl Congress on High Speed Photography and Photonics; (1987) https://doi.org/10.1117/12.975569
Event: 17th International Conference on High Speed Photography and Photonics, 1986, Pretoria, South Africa
Abstract
Premature initiation of ANFO (an explosive mixture of Ammonium Nitrate and Fuel Oil) at a large colliery, near Witbank, was first detected from routine high speed films taken of large mid-burden, and overburden blasts. The analysis of these films shows that the rapid migration of very hot gasses through cracks ahead of the blast may have caused the explosive to initiate prematurely. The problem was not seen in the less competent overburden rocks. A less sensitive explosive has been successfully tried. The assessment of these blasts using high speed photography is discussed.
© (1987) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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A. J. Rorke and E. W. Kohler "The Detection And Analysis Of Blasting Problems Encountered In A Colliery Using High Speed Photography", Proc. SPIE 0674, 17th Intl Congress on High Speed Photography and Photonics, (1 September 1987); https://doi.org/10.1117/12.975569
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KEYWORDS
Explosives
High speed photography
Cameras
Mining
Land mines
Resistance
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