Document Type

Conference Paper

Publication Date


Publication Details

This conference paper was originally published as Beamish, BB and Sainsbury, W, Development of a Site Specific Self-Heating Rate Prediction Equation for a High Volatile Bituminous Coal in Aziz, N (ed), Coal 2008: Coal Operators' Conference, University of Wollongong & the Australasian Institute of Mining and Metallurgy, 2008, 161-165.


The R70 test was performed on a series of coal samples taken from different locations in a US longwall mine. The values obtained produced a definite relationship between R70 and ash content, with the exception of one anomalously low result. An ash analysis of the sample showed that it had a high sodium (Na2O) content in response to the presence of the sodium zeolite mineral, analcime. A multiple regression of the R70, ash content and sodium (Na2O) content of the samples produced a self-heating rate prediction equation with an R2 of 0.98. This equation can now be used to predict the R70 self-heating rate of the coal at any location throughout the mine, thus assisting with hazard management planning.