Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 37 for “"Geological conditions"”.
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Evaluation of strata conditions and performance of support systems of the Emerald Shaft Gold Mine in Gauteng Province of South Africa
… This study aimed to evaluate the strata conditions and performance of support systems of the Emerald Shaft Gold Mine to ensure long-term stability. The objectives of the study included reviewing the mine design and layout, determining geological conditions and their influence on the rock …
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Geologic feature prediction using roof bolter drilling parameters
… from these machines can be used to determine geological features present in the mine roof. A J. H. Fletcher & Co. roof bolter was fitted with an automated control and data acquisition system. Laboratory and underground tests were conducted to collect drilling data from both simulated and …
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Prospects for application of US shale gas technology in Eastern Europe : legal, economic and environmental concerns Poland vs. Ukraine
… countries. The study includes brief overview of geological conditions and discovered reserves of the shale gas in the region, current status of energy balance and relevant legal framework along with official and industry comments on current shale gas activities and analysis of most probable …
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Factors predictive of roof instability in addition to the existing CMRR criteria at two case study coal mines
… by Molinda and Mark (1994) to quantify the geological description of mine roof into a single value which could be used in engineering design. It provides an excellent starting point, but it does not necessarily include all the factors that may influence roof stability, nor is it widely used …
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Modeling uncertainty in the New York City no. 7 subway line extension project using Decision Aids for Tunnelling (DAT)
… the uncertainties associated with project ground conditions, construction activities, and problem events, and to determine distributions of total cost and time for completion of construction. This is done by simulating the geological conditions in each DAT simulation and then using the resulting …
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Integrating Machine Learning Techniques with Measurement-While-Drilling Data for Subsurface Characterization in Open-Pit Mines
… continuous drilling data that reflect subsurface conditions in real time. With the increasing availability of this data, there is a growing opportunity to use data-driven methods to support geological interpretation and geotechnical risk assessment in mining. However, the complexity and …
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Assessing the Spatial Distribution of Volcanic Risk for Tourists on the Island of Santorini
… associated with the geographical location and geological conditions. To date, a wide body of research has mostly focussed on volcanism in and around Santorini, both past and present. In recent years, the number of tourists that visit Santorini has increased significantly (2.3 million in 2019) …
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Prevalence, persistence and consequences of microorganisms within oil field environments and mitigation strategies
… that microorganisms must withstand extreme conditions (high temperatures, high salinities, high pressures and the presence of toxic metals). Furthermore, these “extremophiles” can significantly impact oil production operations both negatively (i.e., reservoir souring) and positively (i.e., …
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The Labour movement in Nottingham 1880-1918
… certainly, the geological conditions of the Nottinghamshire coalfield which may have dampened the militancy of the mining community are pointed to as a possible retarding factor. Similarly, it is argued that the appeal of protectionism for some lace workers, and …
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Distribution, causes and nature of natural landslides in Devon and Cornwall
… was taken to characterise areas where the geological and geomorphological conditions were similar. The methods used for primary data collection were aerial photograph interpretation, airborne thematic mapper data, terrain evaluation and limited field mapping for ground truthing purposes. …
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Minor actinide waste disposal in deep geological boreholes
… of vitrified minor actinide waste in deep geological boreholes using conventional oil/gas/geothermal drilling technology. The nature of minor actinide waste was considered, paying particular attention to nuclides whose decay energy and half lives were of relative significance to the minor …
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Electrokinetic Methods and Applications in Australian Aquifer Settings: High-Dimension Electrical Tomography Imaging and Neural Network Filtration Techniques
… techniques based on prominent and robust hydrogeological principals are continually emerging from advancing technologies, new data sources and forward thinking. However, within the field data retrieval facet of hydrological research a seemingly slower evolution is taking place. A vast quantity …
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Hydraulic fracturing through 3D printing and lattice modelling
… the model is promising on simulations in complex geological conditions.
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Weathering below Irish blanket bogs and impacts on carbon dynamics
… of catchments with varied land use and geological conditions. <br/> <br/>Research demonstrates that traditional models of blanket bog hydrology neglect the influence of substrate flow originating in underlying soil and rock. Stream baseflow from substrate sources is a significant input …
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New technologies for unconventional reservoir characterization: Seismic inversion, focal-time estimation, and signal processing to improve reservoir imaging
… to map and understand the relationship between geological structure and induced seismic events. Constraints obtained from full-waveform inversion provide detailed information about the properties of the Duvernay Formation itself, such as brittle and ductile facies. Accurate microseismic …
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Time-lapse Geophysical Investigations over Known Archaeological Features Using Electrical Resistivity Imaging and Earth Resistance
… times of the year, and under differing weather conditions. This is a problem which can lead to misinterpretation of archaeological features under investigation. The dynamic relationship between a ‘natural’ soil matrix and an archaeological feature is a complex one, which greatly affects the …
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Deep learning framework bridges lab and field scale microseismic focal mechanism
… owing to the limited knowledge on variable geological conditions. Moreover, it has raised public concern that these systems can induce earthquakes. Microseismicity, which has lower magnitude and occur more often than conventional earthquakes, is a key diagnostic tool for these sites. Where …
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Optimization of Coalbed Methane Completion Strategies, Selection Criteria and Production Prediction: A Case Study in China's Qinshui Basin
… and coal permeability as applied to other geological conditions of the Qinshui Basin. Scientific contributions associated with this research include: An in depth study of degasification associated with the Qinshui Basin's low permeability coals; The methodology for assessing environmental, …
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The Atmospheric Fingerprints of Volcanism: Simulating Volcanic Outgassing and Secondary Atmospheres on Rocky Planets
… atmospheres is key to understanding both the conditions required to develop a habitable planet, and to analyse the link between the deep interior and atmosphere of rocky bodies. This thesis uses volcanism as a chemical link between the mantle of a planet and its atmosphere, with the aim of …
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Design parameters and management strategies of soil and rock slopes: Nchanga open pit-Konkola copper mines plc
… for phase III because of variations in geological conditions between Phase I and Phase III. The methodology in this research included reconnaissance surveys, literature review, field work which comprised core logging, mapping, slope monitoring (water table, cracks and slope movements), …
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