|Unsaturated soil mechanics continues to play poor relation to saturated soil mechanics, in part because of the dominance of conventional soil mechanics approaches involving saturated conditions, perhaps because the inclusion of another phase (air) adds considerable complexity, and because a soil at a given density is stronger, less compressible and less permeable (i.e. performs better) than the same soil in a saturated state.|
|Venue||Main Engineering Lecture Theatre 201, University of Tasmania, Sandy Bay Campus,|
|Date||Thursday, 19 July 2012 6.00pm to 7.30pm|
|Event Contact||Dr Hong Liu|
|Contact Phone||0423 910 031|
NOTE: CHANGE OF VENUE TO Main Engineering Lecture Theatre 201
However, there are many applications that are unsaturated, not least in the mining field. Mining examples of unsaturated conditions include the wetting up and drain down of initially dry surface waste rock dumps; the irrigation and drain down of heap leach materials; the drain down, desiccation and rewetting of mine tailings; the dewatering of mineral products such as coal; the strength and compressibility of stored mine wastes; and the performance of geo-covers placed on mine wastes by way of rehabilitation. This seminar highlights the key unsaturated soil mechanics parameters involved, overviews the nature of mining and mineral processing wastes, and some mineral products, and discusses a number of the issues involved. Some applications of unsaturated soil mechanics addressing the strength, compressibility and permeability of mining and mineral processing wastes, and mineral products, are presented, together with data to highlight them.
Speaker: Professor David Williams, BE (Hons I), PhD, CPEng
David Williams completed his Civil Engineering degree at Monash University and his PhD in Soil Mechanics at Cambridge University England. He is currently the Golder Professor of Geomechanics and Director of the new Geotechnical Engineering Centre within the School of Civil Engineering at The University of Queensland (UQ). The Centre is supported by Golder Associates, Rio Tinto, AngloGold Ashanti and BHP Billiton, with matching funding from UQ, to a total of $1.2 million/year. The Centre supports unique Civil & Geotechnical Engineering and Mining & Geotechnical Engineering Dual Major Degree Programs, which have already attracted 70 students, and research. The funding has enabled two Professorial, two additional academic and Postdoctoral research appointments. David’s primary research and consulting interests lie in the application of geotechnical principles, including unsaturated soil mechanics, to the management and rehabilitation of mine wastes, for which he enjoys an international reputation. He has written over 200 referred papers and a number of book chapters.