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Proceedings Paper

The Detection And Analysis Of Blasting Problems Encountered In A Colliery Using High Speed Photography
Author(s): A. J. Rorke; E. W. Kohler
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Paper 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.

Paper Details

Date Published: 1 September 1987
PDF: 13 pages
Proc. SPIE 0674, 17th Intl Congress on High Speed Photography and Photonics, (1 September 1987);
Show Author Affiliations
A. J. Rorke, AECI Explosives Division (South Africa)
E. W. Kohler, AECI Explosives Division (South Africa)

Published in SPIE Proceedings Vol. 0674:
17th Intl Congress on High Speed Photography and Photonics
Donald Hollingworth; Maurice W. McDowell, Editor(s)

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