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Conference Paper

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This conference paper was originally published as Sargeant, J, Beamish, B & Chalmers, D, Times to Ignition Analysis of New South Wales, in Aziz, N (ed), Coal 2009: Coal Operators' Conference, University of Wollongong & the Australasian Institute of Mining and Metallurgy, 2009, 254-358.


The ‘times to ignition’ theory has had limited use in the coal industry and virtually no use within Australia. The concept was originally applied to a range of Scottish coals to assess their spontaneous combustion propensity during transport in a 3x3m shipping hold. This paper presents results from an investigation into the application of the times to ignition (tad) concept to a range of New South Wales coals using data obtained from adiabatic oven self-heating tests. There is a strong association between tad and the R70 self-heating rate of a coal. The geographical location of the coal has a dramatic effect on the tad value as the initial coal temperature significantly changes the results by varying degrees.

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