|Appears in Collections:||Management, Work and Organisation Conference Papers and Proceedings|
|Peer Review Status:||Refereed|
|Title:||Estimation of Coal Pillar Strength by Finite Difference Model|
|Citation:||Oraee K, Hosseini N & Gholinejad M (2009) Estimation of Coal Pillar Strength by Finite Difference Model In: Aziz N (ed.) Coal 2009: Coal Operators' Conference, University of Wollongong & the Australasian Institute of Mining and Metallurgy, Wollongong: University of Wollongong / The Australasian Institute of Mining and Metallurgy. Coal 2009: Coal Operators' Conference, 12.2.2009 - 13.2.2009, Wollongong, Australia, pp. 54-61.|
|Series/Report no.:||Coal Operators' Conference|
|Conference Name:||Coal 2009: Coal Operators' Conference|
|Conference Location:||Wollongong, Australia|
|Abstract:||Longwall mining is now predominately used in coal mines where somewhat difficult conditions exist. As in the case of all other underground mining methods, pillars are integral parts of the mining design. The choice of shape and dimensions of the pillars has significant impact on the recovery and hence on overall productivity of the mine. The process of pillar design in longwall mining entails the selection of a safety factor, which is done by estimating the magnitude of the load applied on the pillar and the load bearing capacity of such pillars. In this paper, finite difference modeling principles have been applied to a typical coal pillar. The pillar strength is then estimated with various width/height ratios. These results have been compared with the results obtained from the conventional methods of pillar design. The effect of roof and floor quality on the strength of the typical pillar has also been evaluated in the same manner. It is concluded that although the finite difference method is not always the perfect method for such estimation, but the results clearly demonstrate that it produces more acceptable design than the conventional method, especially under undesirable conditions regarding the interface between pillars, roof and floor. An additional advantage of such method is shown to be its capability of being applied in situations where complex parameters prevail.|
|Rights:||The publisher has granted permission for use of this conference paper in this Repository. The conference paper was first published in Coal 2009: Coal Operators' Conference, University of Wollongong & the Australasian Institute of Mining and Metallurgy by the University of Wollongong / The Australasian Institute of Mining and Metallurgy on Research Online: http://ro.uow.edu.au/coal|
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