Document Type

Conference Paper

Publication Date


Publication Details

John Hoelle, Open Risk - an Update on the Use of a Pit Highwall Risk Rating System, 14th Coal Operators' Conference, University of Wollongong, The Australasian Institute of Mining and Metallurgy & Mine Managers Association of Australia, 2014, 408-412.


Open Risk is a semi-quantitative risk rating system that takes into account the relative differences in the importance of hazards as experienced at each mine site as a result of different combinations of geotechnical factors and mining conditions. Open Risk provides an unbiased, standard quantified assessment of risks (as input parameters are quantifiable); that rates the likelihood of failure and stability and the consequences/severity of failure. The program is used by technical personnel as a pit inspection tool at several Anglo American coal mines in Australia to assist in evaluating hazards around high walls and to assist in rectifying or avoiding these hazards. The results of the system (severity and likelihood) are approximately analogous with the Anglo American 5 by 5 Risk Rating matrix (consequences and likelihood). The results from these pit inspections indicate a consistency across different personnel and different pits.