Journal of the Southern African Institute of Mining and Metallurgy
On-line version ISSN 2411-9717
Print version ISSN 0038-223X
NORDEN, C. and ISMAIL, J.. Defining a representative overall equipment effectiveness (OEE) measurement for underground bord and pillar coal mining. J. S. Afr. Inst. Min. Metall. [online]. 2012, vol.112, n.10, pp.845-851. ISSN 2411-9717.
The purpose of this article is to show how a representative overall equipment effectiveness (OEE) measurement can be calculated for an underground coal mining bord and pillar batch process. The calculation method, the typical losses (which include planned and unplanned availability losses, coal quality losses, and process rate losses) and the underlying logic are presented and discussed. It is argued that the current traditional underground bord and pillar mining process can currently provide a maximum theoretical OEE of only 49 per cent, while a realistic benchmark target should be in the order of 37 per cent, which relates to an average of 2400 t per shift or 1.2 Mt/a. In addition, it is argued that the current bord and pillar process is the current bottleneck to further improvement past the 2400 t per shift benchmark, and that fundamental process changes will be required to eliminate this bottleneck.
Keywords : plant performance; physical asset management; productivity; overall equipment effectiveness.