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Full-Text Articles in Engineering
Development Of Sediment-Infilled Rock Joint Models And Implications On Rockmass Stability, Buddhima Indraratna, Wuditha N. Premadasa, David Oliveira, H S. Welideniya
Development Of Sediment-Infilled Rock Joint Models And Implications On Rockmass Stability, Buddhima Indraratna, Wuditha N. Premadasa, David Oliveira, H S. Welideniya
Faculty of Engineering - Papers (Archive)
Soil-infi lled discontinuities adversely infl uence the stability of rockmass, because, the infi ll materials especially when saturated, drastically reduce the shear strength. The angle of shearing resistance of a discontinuity decreases signifi cantly for increasing infi ll thickness. Once it reaches a critical thickness, the shear strength of the discontinuity will be governed only by the infi ll material and the rock-walls effect becomes negligible. Owing to the lack of research on the shear behavior of infi lled rock joints, it has been common practice to assume that the shear strength of the joint is that of the infi …
Development And Validation Of Calibration Methods For Discrete Element Modelling, Andrew Grima, Peter W. Wypych
Development And Validation Of Calibration Methods For Discrete Element Modelling, Andrew Grima, Peter W. Wypych
Faculty of Engineering - Papers (Archive)
Discrete element method (DEM) is proving to be a reliable and increasingly used tool to study and predict the behaviour of granular materials. Numerous particlescale mechanisms influence the bulk behaviour and flow of bulk materials. It is important that the relevant measurable input parameters for discrete element models bemeasured by laboratory equipment or determined by physical calibration experiments for rational results. This paper describes some of the bench-scale experiments that have been developed to calibrate the DEM simulations to reflect actual dynamic behaviour. Relevant parameters such as static and rolling coefficients of friction, coefficient of restitution and interparticle cohesion forces …
Development Of A Water-Mist Based Venturi System For Dust Control From Maingate Chocks And Bsl, Ting Ren, Graeme Cooper, Srinivasa Yarlagadda
Development Of A Water-Mist Based Venturi System For Dust Control From Maingate Chocks And Bsl, Ting Ren, Graeme Cooper, Srinivasa Yarlagadda
Faculty of Engineering - Papers (Archive)
Advances in modern longwall (LW) technology have resulted in high production faces with more powerful chocks and shearers that can advance at faster rates. As longwall chocks (supports) advance, crushed roof coal and/or rock can fall from the top of the chock canopy into the face ventilation airflow. Dust survey showed that chock movement is a significant source of dust exposure for shearer operators, accounting for about 47% of total LW face dust make during the cutting cycle. 3D CFD models have been developed to understand the behaviour of longwall dust particles from various sources including maingate (MG) chocks and …
Development Of A Web-Based Underground Coal Mining Information Management System, Ian Porter, Ernest Y. Baafi, Raymond J. Stace
Development Of A Web-Based Underground Coal Mining Information Management System, Ian Porter, Ernest Y. Baafi, Raymond J. Stace
Faculty of Engineering - Papers (Archive)
The development of the Australian Coal Association Research Program (ACARP) funded “one stop shop” information management system for the coal mining industry is described. The site www.undergroundcoal.com.au went live on 28 August 2009 with various sub-modules including an introduction to underground coal mining practices and a handbook of roadway development practice. The site also includes presentations from ACARP six-monthly workshops on current roadway development practice. These workshops provide an invaluable opportunity to share state of the art knowledge in roadway development practice, to learn of emerging Research and Development (Rand D) programs and development of equipment and technology by Original …
Comprehensive Model Of Oxygen Steelmaking Part 1: Model Development And Validation, Neslihan Dogan, Geoffrey A. Brooks, Akbar Rhamdhani
Comprehensive Model Of Oxygen Steelmaking Part 1: Model Development And Validation, Neslihan Dogan, Geoffrey A. Brooks, Akbar Rhamdhani
Faculty of Engineering - Papers (Archive)
A comprehensive model of oxygen steelmaking that includes the kinetics of scrap melting, flux dissolution, slag chemistry, temperature profile of the system, formation and residence of metal droplets in the emulsion, and kinetics of decarburization reaction in different reaction zones was developed. This paper discussed the development and the application of the model into an industrial practice. The results from the model were consistent with the plant data from the study of Cicutti et al. The model suggested that 45% of the total carbon was removed via emulsified metal droplets and the remaining was removed from the impact zone during …