Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Magnetic (15)
- For (12)
- Properties (11)
- Coal (10)
- Effect (9)
-
- Modelling (9)
- System (9)
- Treatment (8)
- Under (8)
- Analysis (7)
- Concrete (7)
- Effects (7)
- Gas (7)
- Performance (7)
- Removal (7)
- Temperature (7)
- Cyclic (6)
- Graphene (6)
- High (6)
- Soil (6)
- Development (5)
- Influence (5)
- Lithium (5)
- Membrane (5)
- Model (5)
- Oxygen (5)
- Steelmaking (5)
- Surface (5)
- Vertical (5)
- Australian (4)
Articles 31 - 60 of 170
Full-Text Articles in Engineering
Fabrication, Magnetic, And Ferroelectric Properties Of Multiferroic Bifeo3 Hollow Nanoparticles, Yi Du, Zhenxiang Cheng, S X. Dou, Darren J. Attard, Xiaolin Wang
Fabrication, Magnetic, And Ferroelectric Properties Of Multiferroic Bifeo3 Hollow Nanoparticles, Yi Du, Zhenxiang Cheng, S X. Dou, Darren J. Attard, Xiaolin Wang
Faculty of Engineering - Papers (Archive)
Hollow BiFeO3 nanoparticles were synthesized by an electrospray route for the first time. The phase purity and structure have been investigated by x-ray diffraction and Raman spectroscopy. Transmission and scanning electron microscope investigations revealed that the as-obtained BiFeO3 hollow spheres were polycrystalline, with a shell thickness of 35 nm. The formation mechanism can be possibly explained by Ostwald ripening. Raman spectra have verified decreased vibrational frequencies in BiFeO3 nanoparticles. These hollow and core-shell multiferroic nanoparticles exhibit significantly enhanced ferromagnetism from 5 to 600 K due to a broken spiral spin structure. The ferroelectricity of hollow BiFeO3 …
A Gbh/Libh4 Coordination System With Favorable Dehydrogenation, Yanhui Guo, Qinfen Gu, Zaiping Guo, Jianfeng Mao, Hua-Kun Liu, S. X. Dou, Xuebin Yu
A Gbh/Libh4 Coordination System With Favorable Dehydrogenation, Yanhui Guo, Qinfen Gu, Zaiping Guo, Jianfeng Mao, Hua-Kun Liu, S. X. Dou, Xuebin Yu
Faculty of Engineering - Papers (Archive)
A novel combined hydrogen storage system LiBH4/[C(NH2)3]+[BH4]− (GBH) complexes were reported. By a short time ball milling of LiBH4 and guanidinium chloride, a series of new LiBH4/GBH complexes were produced. It was found that the two potential hydrogen storage materials exhibited a mutual dehydrogenation improvement, releasing >10.0 wt.% of fairly pure H2 from LiBH4/GBH below 250 °C. Further investigations revealed that balancing the protic and hydridic hydrogens, and the complexation between LiBH4 and GBH, are two important roles in the improvement of …
Magnetoresistance, Critical Current Density, And Magnetic Flux Pinning Mechanism In Nickel Doped Bafe2as2 Single Crystals, Mahboobeh Shahbazi, Xiaolin Wang, Z W. Lin, J G. Zhu, S. X. Dou, K Y. Choi
Magnetoresistance, Critical Current Density, And Magnetic Flux Pinning Mechanism In Nickel Doped Bafe2as2 Single Crystals, Mahboobeh Shahbazi, Xiaolin Wang, Z W. Lin, J G. Zhu, S. X. Dou, K Y. Choi
Faculty of Engineering - Papers (Archive)
The critical current density, Jc, flux pinning behavior and magneto- resistance results of BaFe2-xNixAs2 single crystal have been investigated in fields up to 13 T over a temperature range of 2 to 20 K. The magnetoresistance below the superconducting transition temperature (Tc) shows Arrhenius thermally activated behavior: ρ = ρoexp(-Uo(T,H)/kBT), where Uo is the thermally activated energy. BaFe2-xNixAs2 exhibits high thermally activated flux flow energy with a very weak …
Effect Of Initial Static Shear Stress On The Undrained Cyclic Behavior Of Saturated Sand By Torsional Shear Loading, Gabriele Chiaro, Takeshi Sato, Takashi Kiyota, Junichi Koseki
Effect Of Initial Static Shear Stress On The Undrained Cyclic Behavior Of Saturated Sand By Torsional Shear Loading, Gabriele Chiaro, Takeshi Sato, Takashi Kiyota, Junichi Koseki
Faculty of Engineering - Papers (Archive)
With the aim of gaining a better understanding of the role which the static shear plays on the large-deformation behavior of saturated sand, a series of undrained cyclic torsional shear tests on saturated Toyoura sand specimens up to single amplitude shear strain of about 50 % were performed. Several hollow cylinder specimens at relative density of 44 - 48 % were tested while varying the initial static shear and the subsequent cyclic shear stress levels. Depending on the degree of stress reversal, the loading pattern could be classified into three groups: stress reversal, intermediate and non-reversal. The observed failure behavior …
Taut-Slack Algorithm For Analyzing The Geometric Nonlinearity Of Cable Structures, Zhuo Wang, Timothy Mccarthy, M Neaz Sheikh
Taut-Slack Algorithm For Analyzing The Geometric Nonlinearity Of Cable Structures, Zhuo Wang, Timothy Mccarthy, M Neaz Sheikh
Faculty of Engineering - Papers (Archive)
This paper presents an improved small strain elastic finite element formulation to analyze static multi-component mooring cable problems. The inherent catenary profile of a cable subjected to self-weight and other loads can be solved quickly with the flexibility iteration approach coupled with the ‘Taut-slack’ algorithm. This new algorithm improves the stability of the Newton-Raphson solution process. The results for an example problem have been found to be consistent with those from OrcaFlex.
Mr Damper In Reducing Pounding Effect Of Base-Isolated Rc Highway Bridge, M Neaz Sheikh, Jingya Xiong, Weihua Li
Mr Damper In Reducing Pounding Effect Of Base-Isolated Rc Highway Bridge, M Neaz Sheikh, Jingya Xiong, Weihua Li
Faculty of Engineering - Papers (Archive)
Significant structural damage due to pounding between adjacent superstructures of multispan reinforced concrete (RC) highway bridges has been observed in past earthquakes. Different methods have been proposed in the literature to mitigate the adverse pounding effect. This paper presents an analytical investigation on the use of magnetorheological (MR) dampers in reducing the pounding effect of base-isolated multi-span RC highway bridges. It has been observed that MR damper can effectively reduce adverse pounding effect. Three control strategies (passive off, passive on, and bang bang control) of MR damper have been investigated. Although all the control strategies are found to be effective, …
Dispersion Of Sno2 Nanocrystals On Tio2(B) Nanowires As Anode Material For Lithium Ion Battery Applications, Zunxian Yang, Guodong Du, Qing Meng, Zaiping Guo, Xuebin Yu, Zhixin Chen, Tailiang Guo, Rong Zeng
Dispersion Of Sno2 Nanocrystals On Tio2(B) Nanowires As Anode Material For Lithium Ion Battery Applications, Zunxian Yang, Guodong Du, Qing Meng, Zaiping Guo, Xuebin Yu, Zhixin Chen, Tailiang Guo, Rong Zeng
Faculty of Engineering - Papers (Archive)
TiO2(B)@SnO2 core–shell hybrid nanowires have been synthesized by a facile hydrothermal process and subsequent liquid phase reaction. Hybrid nanowire electrodes exhibit excellent reversible lithium storage capacity rate capability and good cyclability, mainly due to the particular architecture of the composite, which features an open continuous channel along its axis, facilitating lithium ion diffusion, and provides effective mechanical support for the TiO2(B) core, alleviating the stress produced during discharge–charge cycling and also preventing the pulverization of the Sn nanoparticles. Owing to its superior electrochemical performance, this composite could be a promising potential anode material for lithium …
Flow Of Slag Through Coke Channels At 1500c, Hazem F. Labib, Brian J. Monaghan, Raymond L. Longbottom, Sheng J. Chew, Peter R. Austin
Flow Of Slag Through Coke Channels At 1500c, Hazem F. Labib, Brian J. Monaghan, Raymond L. Longbottom, Sheng J. Chew, Peter R. Austin
Faculty of Engineering - Papers (Archive)
The ironmaking blast furnace forms part of the dominant process route for steelmaking worldwide. In the lower zone of this shaft reactor, liquid iron and slag descend countercurrent to reducing gases through a packed bed of coke. The fundamental characteristics of these liquid flows are not fully understood, but influence the product quality, production rate, fuel use and asset life of the process, and hence the greenhouse gas emissions and competitiveness of the integrated steel industry. The present study aimed to establish the criteria for the passage of slag through the narrow pore necks that form between coke particles. To …
Managing The Multi-Agent Supply Network: Agents Relationships, Risk, And Collaboration, Abdelrahim Alnatour, Peter Gibson
Managing The Multi-Agent Supply Network: Agents Relationships, Risk, And Collaboration, Abdelrahim Alnatour, Peter Gibson
Faculty of Engineering - Papers (Archive)
This paper discusses some agency theory aspects that apply to the modern supply network. The discussion extends to cover how agency theory influences and affects business relationships in modern industrial supply networks. The underlying correlation between agency theory and the overall supply network performance is investigated by reviewing the existing literature. The paper also overviews a current research in progress, the research is concerned with performance and how it can be improved through reducing risk and improving collaboration in a multi-agent supply network. Flexibility and agency cost are proposed metrics for measuring performance from an organizational, agency perspective. The research …
Influence Of Coke Ash On Blast Furnace Hearth Behaviour, M W. Chapman, Robert J. Nightingale, B J. Monaghan
Influence Of Coke Ash On Blast Furnace Hearth Behaviour, M W. Chapman, Robert J. Nightingale, B J. Monaghan
Faculty of Engineering - Papers (Archive)
Abstract Liquid iron in the ironmaking blast furnace picks up more than half of its carbon while percolating through the packed coke bed in the deadman and hearth of the blast furnace thus the conditions within the hearth have a direct impact on liquid drainage and hot metal quality. Consequently, the rate of carbon dissolution into liquid iron, and the factors contributing to the movement of liquids through the coke bed must be understood. Investigations using quenched coke dissolution techniques have demonstrated that a mineral layer was formed between the liquid iron and the coke matrix as coke dissolves into …
Modelling And Performance Enhancement Of A Linear Actuation Mechanism Using Conducting Polymers, Elise T. Burriss, Gursel Alici, Geoffrey M. Spinks, Scott Mcgovern
Modelling And Performance Enhancement Of A Linear Actuation Mechanism Using Conducting Polymers, Elise T. Burriss, Gursel Alici, Geoffrey M. Spinks, Scott Mcgovern
Faculty of Engineering - Papers (Archive)
In this paper, we report on our investigation into modelling and performance enhancement of a linear actuation system based on cantileveredtype conducting polymer actuators, which can operate in air and aqueous media. We have employed the model to predict the linear displacement and force output of the actuation system, and to determine the optimum values of the system design parameters. The linear actuation system is a five bar parallel mechanism, articulated with two polymer actuators. Kinematic and force analyses of the mechanism including numerical results are presented, and its payload handling ability was experimentally evaluated. The experimental results prove that …
Microwave Hydrothermal Synthesis Of Nano Co3o4 With Various Morphologies, Ben Niu, Liying Man, Jieqiang Wang
Microwave Hydrothermal Synthesis Of Nano Co3o4 With Various Morphologies, Ben Niu, Liying Man, Jieqiang Wang
Faculty of Engineering - Papers (Archive)
"The precursors with various morphologies including nanowires, nanosheets, and hexagonal nanoplatelets were synthesized under different conditions by the microwave hydrothermal method. The precursors are transformed into Co(3)O(4) with various nanostructures through thermal decomposition. It is very important to synthesize the precursors controlling the microwave hydrothermal conditions, such as the mineralizer, the reaction temperature, and the reaction time. The microwave assisted hydrothermal approach presented here opens a potential avenue to explore the synthesis of various other metal oxides with different nanomorphologies."
Rehabilitating Destructed Reinforced Concrete T Connections By Steel Straps, Muhammad N. S Hadi
Rehabilitating Destructed Reinforced Concrete T Connections By Steel Straps, Muhammad N. S Hadi
Faculty of Engineering - Papers (Archive)
The aim of this paper is to present results of testing a full scale reinforced concrete T connection by static loading. The connection represents a beam-column connection. The beam and column had a square cross section with a 300 mm dimension. The height of the column was 2.9 m and the clear beam length was 1.4 m. The connection was initially tested to failure. Galvanised steel straps were used to rehabilitate the connection. Epoxy resin was used to fix the steel straps to the concrete surface. The connection was tested after the rehabilitation. Results of testing the rehabilitated connection show …
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 …
A Real-Time Measuring Technology For Studying Distortion Of Hydraulic Turbine Blade Castings During Heat Treatment Process, Hailiang Yu, Jinwu Kang, Gang Nie, Haimin Long, Xiaokun Hao, Tianyou Huang
A Real-Time Measuring Technology For Studying Distortion Of Hydraulic Turbine Blade Castings During Heat Treatment Process, Hailiang Yu, Jinwu Kang, Gang Nie, Haimin Long, Xiaokun Hao, Tianyou Huang
Faculty of Engineering - Papers (Archive)
During heat treatment process, the distortion behavior inevitably appears in hydraulic turbine blade castings. In this research, a technology was developed for real-time measurement of the distortion in hydraulic turbine blade castings at the still air cooling and forced air cooling stages during heat treatment process. The method was used to measure the distortion behavior at the cooling stages in both normalizing and tempering processes. At the normalization, the distortion at the blade corner near outlet side undergoes four stages with alternating bending along positive and negative directions. At the tempering stage, the distortion could be divided into two steps. …
Reduction Of Hysteresis Losses In The Magnetic Refrigerant La0.8ce0.2fe11.4si1.6 By The Addition Of Boron, Precious Shamba, J.C Debnath, Rong Zeng, Jianli Wang, Stewart J. Campbell, S J. Kennedy, S. X. Dou
Reduction Of Hysteresis Losses In The Magnetic Refrigerant La0.8ce0.2fe11.4si1.6 By The Addition Of Boron, Precious Shamba, J.C Debnath, Rong Zeng, Jianli Wang, Stewart J. Campbell, S J. Kennedy, S. X. Dou
Faculty of Engineering - Papers (Archive)
In an effort to improve the magnetocaloric effects of the NaZn13-type La0.8Ce0.2Fe11.4Si1.6 compound, the effect of boron doping on the magnetic properties and magnetocaloric properties has been investigated. The magnetic entropy change (ΔSM) for the La0.8Ce0.2Fe11.4Si1.6 compound, obtained for a field change of 0–5 T using the Maxwell relation exhibits a spike and appears to be overestimated and is thus corrected by using the Clausius-Clapeyron equation (CC). The ΔSM determined from the CC equation is estimated to be 19.6 J kg …
Dust Controls And Monitoring Practices On Australian Longwalls, Ting Ren, Brian Plush, Najdat I. Aziz
Dust Controls And Monitoring Practices On Australian Longwalls, Ting Ren, Brian Plush, Najdat I. Aziz
Faculty of Engineering - Papers (Archive)
Fugitive dust on longwalls has always been an issue of concern for production, safety and the health of workers in the underground coal mining industry globally. Longwall personnel can be exposed to harmful dust from multiple dust generation sources. With the increase in production created from the advancement in longwall equipment, dust loads have also increased and this has resulted in an increase in exposure levels to personnel. Control processes in place for the mitigation of dust vary from mine to mine, with each individual mine having a dust mitigation setup that is only effective for that particular mine operation. …
Effect Of Thermal Strain On J(C) And T-C In High Density Nano-Sic Doped Mgb2, Wenxian Li, Rong Zeng, Lin Lu, S. X. Dou
Effect Of Thermal Strain On J(C) And T-C In High Density Nano-Sic Doped Mgb2, Wenxian Li, Rong Zeng, Lin Lu, S. X. Dou
Faculty of Engineering - Papers (Archive)
The influences of lattice strain on the superconducting critical current density Jc and critical transition temperature Tc in pure MgB2 and a SiC-MgB2 composite made by the diffusion process are explored, based on the thermal expansion coefficients and the low temperature effects on Raman scattering. The strong thermal strain provides a strong flux pinning force for the supercurrents at the interfaces between SiC and MgB2. The high Tc of SiC-MgB2 is also discussed according to the expanded lattice and Raman characteristics.
Improvement Of Rock Bolt Profiles Using Analytical And Numerical Methods, Chen Cao, Jan Anton Nemcik, Najdat I. Aziz
Improvement Of Rock Bolt Profiles Using Analytical And Numerical Methods, Chen Cao, Jan Anton Nemcik, Najdat I. Aziz
Faculty of Engineering - Papers (Archive)
The anchorage capacity of fully grouted bolts has been studied for many years, however the bolt rib profile and its effect on bolt shear resistance is poorly understood. A new development in calculating load transfer capacity between two rib profiles of varying geometries is discussed. The derived mathematical equations presented calculate the stress distribution adjacent to the fully grouted bolt and bolt pull out force needed to fail the resin. The Fast Lagrangian Analysis Continua (FLAC) program was used to verify the calculations of stress within the resin. The novel idea of coupling the bolt geometry with the calculated stress …
Magnetic And Ferroelectric Properties Of Multiferroic Bi2nimno6 Nanoparticles, Yi Du, Zhenxiang Cheng, Xiaolin Wang, Peng Liu, S. X. Dou
Magnetic And Ferroelectric Properties Of Multiferroic Bi2nimno6 Nanoparticles, Yi Du, Zhenxiang Cheng, Xiaolin Wang, Peng Liu, S. X. Dou
Faculty of Engineering - Papers (Archive)
Multiferroic Bi2NiMnO6 nanoparticles were synthesized by a simple electrospray method. Bi2NiMnO6 nanoparticles crystallize in the monoclinic structure with space group C121. The particles show a uniform spherical shape with a diameter of 100 nm to 300 nm. The ferromagnetic transition of Bi2NiMnO6 is confirmed at 122 K. The room temperature ferroelectricity of the Bi2NiMnO6 nanoparticles is verified by Kelvin probe force microscopy.
Influence Of Temperature On Coal Sorption Characteristics And The Theory Of Coal Surface Free Energy, Lei Zhang, Najdat I. Aziz, Ting Ren, Zhongwei Wang
Influence Of Temperature On Coal Sorption Characteristics And The Theory Of Coal Surface Free Energy, Lei Zhang, Najdat I. Aziz, Ting Ren, Zhongwei Wang
Faculty of Engineering - Papers (Archive)
An experimental study was undertaken to examine the sorption and desorption characteristics of coal at temperatures of 35 °C, 45 °C and 55 °C. The study focused on the effect of changes in temperature and coal particle sizes on gas sorption and desorption characteristics. The coal size used ranged from fragmented coals, 16 mm, 8 mm, 2.4 mm, powdered coal of 150 μm and 54 mm core samples. The samples were tested in pressure vessels, known as “bombs”, charged with CO2 gas at different pressure levels up to a maximum of 4000 kPa. It was found that temperature has a …
Design Of Water Holding Bulkheads For Coal Mines, Verne Mutton, Alexander Remennikov
Design Of Water Holding Bulkheads For Coal Mines, Verne Mutton, Alexander Remennikov
Faculty of Engineering - Papers (Archive)
Water control has been and remains a fundamentally important aspect of underground coal mine design and operation worldwide. Mining in the vicinity of large bodies of water, below a worked out coal seam or under confined aquifer or abandoned water logged workings is always fraught with the possibility of the danger of inundation. Inrush control is now part the Fatal Hazard Protocols which is a risk based process in all operations. In modern Australian underground coal mines, in which panel layouts have been extended and production rates are approaching 10 Mtpa, there is much focus on the control of water …
Actions To Improve Coal Seam Gas Drainage Performance, Dennis Black, Najdat I. Aziz
Actions To Improve Coal Seam Gas Drainage Performance, Dennis Black, Najdat I. Aziz
Faculty of Engineering - Papers (Archive)
Coal seam gas drainage is affected by many factors which may be generally divided into two groups, geological factors and operational factors. Studies conducted in the Bulli seam found geological factors had a dominant impact on coal seam gas drainage while operational factors had a secondary impact, affecting the amount of optimum gas drainage performance achieved within the limitations imposed by the prevailing geological conditions. Various operational factors, which are controllable by the mine operator and which have a significant impact on gas drainage effectiveness, are presented and recommendations made to improve and optimise gas drainage performance.
Mine Gas Drainage And Outburst Control In Australian Underground Coal Mines, Najdat I. Aziz, Dennis Black, Ting Ren
Mine Gas Drainage And Outburst Control In Australian Underground Coal Mines, Najdat I. Aziz, Dennis Black, Ting Ren
Faculty of Engineering - Papers (Archive)
Australia produces both black and brown coal and is the world's fourth largest producer of black coal, after China, USA and India. Australian underground coal mines operate under controlled safety codes. The establishment of the mine safety management system, including the 1994 outburst management plan, contributed to a significant improvement in mine safety leading to non-fatality in outburst related incidences since 1994. The management of outburst risk, as a part of the overall safety and health management system is described. Also discussed are the introduction of outburst threshold limit values and the desorption rate index which forms the basis for …
Effect Of Different Additives On The Hydrogen Storage Properties Of The Mgh 2-Lialh 4 Destabilized System, S X. Dou, Yue Zhao, Xuebin Yu, Mohammad Ismail
Effect Of Different Additives On The Hydrogen Storage Properties Of The Mgh 2-Lialh 4 Destabilized System, S X. Dou, Yue Zhao, Xuebin Yu, Mohammad Ismail
Faculty of Engineering - Papers (Archive)
The hydrogen storage properties of the MgH2-LiAlH4 (4 : 1) composite system with and withoutadditives were studied. 5 wt.% of TiF3, NbF5, NiF2, CrF2, YF3, TiCl3?1/3AlCl3, HfCl4, LaCl3, CeCl3,and NdCl3, respectively, was added to the MgH2-LiAlH4 (4 : 1) mixture, and their catalytic effect wasinvestigated. Temperature programmed desorption results show that addition of metal halides to theMgH2-LiAlH4 (4 : 1) composite system improves the onset desorption temperature. The hydrogendesorption properties of metal halide-doped MgH2-LiAlH4 (4 : 1) composites were also improved ascompared to the undoped MgH2-LiAlH4 (4 : 1) composite. Furthermore, the activation energy andthe change in enthalpy in the …
Dosimetry Verification In Eye Brachytherapy Using Silicon Pixelated Detectors, Michael Weaver, Marco Petasecca, Michael L. Lerch, Dean L. Cutajar, J Jakubek, S Pospsil, Anatoly B. Rosenfeld
Dosimetry Verification In Eye Brachytherapy Using Silicon Pixelated Detectors, Michael Weaver, Marco Petasecca, Michael L. Lerch, Dean L. Cutajar, J Jakubek, S Pospsil, Anatoly B. Rosenfeld
Faculty of Engineering - Papers (Archive)
This study presents a high spatial resolution dosimetry system for quality assurance of I-125 eye plaques. The system is based on a silicon pixelated detector and is capable of deriving 3D dose distributions. A simple design was implemented, incorporating a movable eye plaque in a small water phantom above the silicon Medipix2 detector. It is designed for obtaining 2D dose distributions at different depths in water, for subsequent 3D dose mapping. The effect of backscattering in a medium placed behind the Medipix2 to simulate surrounding tissue has been studied in terms of dose distribution. Additionally, two modes of acquisition, event …
Review Of Gas Emission Prediction And Control Methods For Multi-Seam Mining In Chinese Coal Mines, Zhongwei Wang, Ting Ren, Lei Zhang
Review Of Gas Emission Prediction And Control Methods For Multi-Seam Mining In Chinese Coal Mines, Zhongwei Wang, Ting Ren, Lei Zhang
Faculty of Engineering - Papers (Archive)
In China, the practice of multi-seam mining with high gas emission rates is common, and many coal mines are suffering from major gas management issues. To deal with these problems, empirical formulas for gas emission prediction and gas control methods suitable for site-specific conditions are developed. Specifically, the statistical method and split–source-method are widely used for gas emission prediction. In addition to ventilation, various gas control methods, including cross-measure boreholes, directional long-holes, dedicated roadways and surface goaf wells are used for gas drainage. Techniques for integrated extraction of coal and coal seam gas have been developed in these coal mines, …
Some Geomorphological Techniques Used In Constraining The Likelihood Of Landsliding - Selected Australian Examples, Anthony Miner, Phillip N. Flentje, C Mazengarb, J Selkirk-Bell, Peter Dahlhaus
Some Geomorphological Techniques Used In Constraining The Likelihood Of Landsliding - Selected Australian Examples, Anthony Miner, Phillip N. Flentje, C Mazengarb, J Selkirk-Bell, Peter Dahlhaus
Faculty of Engineering - Papers (Archive)
Techniques for landslide risk management in Australia have evolved considerably since the publication of the first formal process in 1985. The Australian Geomechanics Society recently published the next generation of updated landslide risk documents in 2007. The estimation of landslide likelihood is fundamental to the outcome of the landslide risk management process. However, experienced practitioners still regard this component as one of the most difficult and challenging aspects of the assessment as it requires information about the age of landslides, an understanding of landscape processes and the rate of slope evolution. Such information is difficult to obtain and is often …
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 …
Practice And Prospect Of Fully Mechanised Mininig Technology For Thin Coal Seams Under Complex Conditions In China, Shihao Tu, Fangtian Wang, Yan Lu, Qi Wu, Qingsheng Bai
Practice And Prospect Of Fully Mechanised Mininig Technology For Thin Coal Seams Under Complex Conditions In China, Shihao Tu, Fangtian Wang, Yan Lu, Qi Wu, Qingsheng Bai
Faculty of Engineering - Papers (Archive)
In China, thin coal seam are rich in resources and complex in conditions, however, the characteristics such as narrow mining space, the low level of mechanised technology, bad working environment and the high cost of mining, directly restrict the development of mining safety and high-efficiency. In thin coal seams with hard gangue which contains concretions of pyrite, LS-DYNA is applied to calculate the rational blasting parameters and carry out the deep-hole pre-splitting blasting technology, the hard gangue is fractured effectively, hence advancing the productivity of thin coal seam mining. In addition, the mining rate is sped up in thin protective …