Effect of deep-sea drilling on sustainability of deep-sea ecosystems. Offshore oil and gas production makes a significant contribution to the Australian economy and enhances our energy security. Australia's vast deep-sea reserves of hydrocarbons lie on the NW Shelf and in Bass Strait, ecological 'hot spots' that are extremely vulnerable to the impact of exploration, extraction and production. Using deep-sea equipment, we will conduct the field experiments that are essential to understanding the ....Effect of deep-sea drilling on sustainability of deep-sea ecosystems. Offshore oil and gas production makes a significant contribution to the Australian economy and enhances our energy security. Australia's vast deep-sea reserves of hydrocarbons lie on the NW Shelf and in Bass Strait, ecological 'hot spots' that are extremely vulnerable to the impact of exploration, extraction and production. Using deep-sea equipment, we will conduct the field experiments that are essential to understanding these ecosystems and the impact of deep-sea structures. Our advances will produce data and develop methodologies that will make Australia a world leader in reconciling our deep-sea energy and environmental needs.Read moreRead less
Mining, irrigation, and groundwater: Towards a reliable protocol for assessing the impacts of extraction on groundwater fauna and ecology. Groundwater fluctuations associated with mining and increased irrigation demands, potentially threaten many of Australia's unique groundwater invertebrates (stygofauna) with extinction. Stygofauna represent a hidden store of biodiversity and are thought to have a critical, but poorly understood, role in enhancing groundwater quality. Environmentally sustainab ....Mining, irrigation, and groundwater: Towards a reliable protocol for assessing the impacts of extraction on groundwater fauna and ecology. Groundwater fluctuations associated with mining and increased irrigation demands, potentially threaten many of Australia's unique groundwater invertebrates (stygofauna) with extinction. Stygofauna represent a hidden store of biodiversity and are thought to have a critical, but poorly understood, role in enhancing groundwater quality. Environmentally sustainable development of groundwater resources is hampered by a dearth of information on the ecological needs of stygofauna and how they respond to human-induced change. Using field and laboratory experiments, we aim to determine how water table fluctuations threaten stygofauna. From our results we will develop sampling and management protocols to monitor and protect stygofauna communities.Read moreRead less
Behaviour of a cementing slurry in a full-scale mining stope. Any mining technique that allows improved extraction of ore from underground workings results in improved financial viability of the mining process concerned. Such improved extraction rates are being achieved by backfilling previously mined voids with cemented mine waste, which also improves stability of the underground workings. This research will further improve the financial viability of mines using this technique by reducing the a ....Behaviour of a cementing slurry in a full-scale mining stope. Any mining technique that allows improved extraction of ore from underground workings results in improved financial viability of the mining process concerned. Such improved extraction rates are being achieved by backfilling previously mined voids with cemented mine waste, which also improves stability of the underground workings. This research will further improve the financial viability of mines using this technique by reducing the amount of cement used, without compromising the safety of workers. In some otherwise marginal mines, these savings could be the difference between the mine staying open and being placed on care-and-maintenance, with the potential loss of jobs in mainly remote parts of the country.Read moreRead less
The evolution of effective stress in sedimenting clayey slurries. Activities such as water treatment, mining and dredging produce enormous volumes of semi-solid waste annually. The safe and environmentally responsible management of these wastes is costly, consumes vast quantities of water, and sterilises large areas of land. We will address these issues through understanding and manipulating the interaction between individual particles in these slurries to produce desired engineering outcomes. T ....The evolution of effective stress in sedimenting clayey slurries. Activities such as water treatment, mining and dredging produce enormous volumes of semi-solid waste annually. The safe and environmentally responsible management of these wastes is costly, consumes vast quantities of water, and sterilises large areas of land. We will address these issues through understanding and manipulating the interaction between individual particles in these slurries to produce desired engineering outcomes. This will be done by developing a laboratory testing column in which the gain in strength and rigidity of a settling slurry are fully characterised, enabling an improvement in design of safe and economical impoundment structures for these waste materials.
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New tools for old rocks: first cycle provenance information. The aims of this research are to enhance stratigraphic understanding of sedimentary sequences in Western Australia through application of novel provenance fingerprinting tools in K-feldspar (Pb isotopes) & apatite (U-Pb, Sr isotopes and grain chemistry). While much stratigraphic characterization has been based on detrital zircon ages & their correlation to basement sources, two major limitations are apparent: a) zircon may be multicycl ....New tools for old rocks: first cycle provenance information. The aims of this research are to enhance stratigraphic understanding of sedimentary sequences in Western Australia through application of novel provenance fingerprinting tools in K-feldspar (Pb isotopes) & apatite (U-Pb, Sr isotopes and grain chemistry). While much stratigraphic characterization has been based on detrital zircon ages & their correlation to basement sources, two major limitations are apparent: a) zircon may be multicycle, blurring source-sink relationships, b) zircon may be absent in mafic lithologies thus biasing investigations. In this work K-feldspar & apatite provenance investigation will be undertaken on a state wide basis and include case studies in the Yilgarn Craton and Canning & Northern Carnarvon Basins.
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Linkage Infrastructure, Equipment And Facilities - Grant ID: LE150100058
Funder
Australian Research Council
Funding Amount
$560,000.00
Summary
Three dimensionally compressed and monitored Hopkinson bar . 3D compressed and monitored Hopkinson bar: The 3D compressed and monitored Hopkinson bar allows determination of the dynamic mechanical properties and fracturing behaviour of materials under such confinement. Understanding material behaviour under dynamic loading is essential in dealing with many engineering problems as excavation, fragmentation, earthquake, blasting, and structure design. In geotechnical and structure projects, materi ....Three dimensionally compressed and monitored Hopkinson bar . 3D compressed and monitored Hopkinson bar: The 3D compressed and monitored Hopkinson bar allows determination of the dynamic mechanical properties and fracturing behaviour of materials under such confinement. Understanding material behaviour under dynamic loading is essential in dealing with many engineering problems as excavation, fragmentation, earthquake, blasting, and structure design. In geotechnical and structure projects, materials are often subjected to existing confining stresses. The full-field optical techniques, with an ultra-high speed and resolution camera in the system, aims to assist the quantitative measurement of deformation fields including small strain induced in brittle material's failure and identification of constitutive parameters.Read moreRead less
Linkage Infrastructure, Equipment And Facilities - Grant ID: LE160100206
Funder
Australian Research Council
Funding Amount
$800,000.00
Summary
National Rock, Concrete and Advanced Composite Testing Capability. National rock, concrete and advanced composite testing capability:
The aim of the project is to develop a national hybrid biaxial/true triaxial load testing facility to serve the needs of geotechnical, structural, mining and materials researchers and engineers for sophisticated testing. It would address the need for leading edge testing and analysis of the deformation and strength of rock, concrete, and thin plates comprising me ....National Rock, Concrete and Advanced Composite Testing Capability. National rock, concrete and advanced composite testing capability:
The aim of the project is to develop a national hybrid biaxial/true triaxial load testing facility to serve the needs of geotechnical, structural, mining and materials researchers and engineers for sophisticated testing. It would address the need for leading edge testing and analysis of the deformation and strength of rock, concrete, and thin plates comprising metals, composites and polymers, under a wide range of loading conditions. The facility would accommodate cubic specimens up to 300 millimetres and be able to apply 10 megapascals of stress in up to three orthogonal directions. State-of-the-art monitoring equipment is designed to assess the degree of damage caused by testing, simulating damage induced by blasting, cutting, static loading and/or impact.Read moreRead less
Nature's mechanisms for leaching and remobilising metals. This project aims to understand the chemical and physical processes that govern reactive transport and metal scavenging in rocky environments. Much of Australia's mineral wealth is the result of the interaction of warm fluids with rocks deep in the Earth over geological timescales. The formation of ore deposits is governed by the physical chemistry of mineral dissolution and crystallisation, and by fluid flow through porous rocks and frac ....Nature's mechanisms for leaching and remobilising metals. This project aims to understand the chemical and physical processes that govern reactive transport and metal scavenging in rocky environments. Much of Australia's mineral wealth is the result of the interaction of warm fluids with rocks deep in the Earth over geological timescales. The formation of ore deposits is governed by the physical chemistry of mineral dissolution and crystallisation, and by fluid flow through porous rocks and fractures. This project integrates innovation in geology, chemistry, and mineral engineering, and will deliver mineral-scale reaction models that will increase efficiency of in-situ mining and leaching technologies. Knowledge generated can be applied to improve mineral exploration, mining, and processing, contributing to unlocking billions of dollars’ worth of resources tied up in low grade, mineralogically complex ores.Read moreRead less
A benign alkaline process for scarce metal extraction and reagent recycle. A benign alkaline process for scarce metal extraction and reagent recycle.. This project aims to selectively extract base and precious metals from their ores in saline and non-saline environments, building upon a patented process utilising edible glycine under oxidising and mildly alkaline solutions. Extraction processes of metals from primary resources mostly use harsh, toxic and/or non-recyclable reagents. Exploratory r ....A benign alkaline process for scarce metal extraction and reagent recycle. A benign alkaline process for scarce metal extraction and reagent recycle.. This project aims to selectively extract base and precious metals from their ores in saline and non-saline environments, building upon a patented process utilising edible glycine under oxidising and mildly alkaline solutions. Extraction processes of metals from primary resources mostly use harsh, toxic and/or non-recyclable reagents. Exploratory research has already indicated the potential for easy metal recovery from their alkaline glycinate solutions and recycling of the lixiviant (glycine). Anticipated outcomes are a safe, non-toxic process for extracting metals from primary resources.Read moreRead less
Avoiding catastrophic failure of cable bolts in underground mines. This work aims to identify the factors responsible for the emerging problem of catastrophic failure of high-load cable bolts in underground mines and develop strategies for resisting their failure. The work is of high importance since failure of cable bolts is now being reported in several mines across Australia and is expected to become a problem world-wide. The work is novel as it intends to be the very first study of catastrop ....Avoiding catastrophic failure of cable bolts in underground mines. This work aims to identify the factors responsible for the emerging problem of catastrophic failure of high-load cable bolts in underground mines and develop strategies for resisting their failure. The work is of high importance since failure of cable bolts is now being reported in several mines across Australia and is expected to become a problem world-wide. The work is novel as it intends to be the very first study of catastrophic cable bolt failure. The expected outcome is the development of economically viable solutions for avoiding catastrophic cable bolt failure. It is anticipated that the findings will also be relevant to the civil engineering sector.Read moreRead less