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 54 for “"rock type"”.
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Long-Term Effects of Rock Type, Weathering and Amendments on Southwest Virginia Mine Soils
This study measured the effects of spoil type and amendments on Appalachian mine soil properties over time. The Controlled Overburden Placement Experiment was installed in 1982 in two parts, the Rock Mix (RM) Experiment compares mixes of sandstone (SS) and siltstone (SiS) spoils while the Surface …
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Fluvial processes, beaver activity, and climate in the greater Yellowstone ecosystem and rock type control on hillslope morphology and soil development in the Sandia Mountains, New Mexico
… drought years. Chapter 3 explores the role of rock type in hillslope soil formation and slope morphology in the Sandia Mountains of New Mexico. Resistant rock types have a profound impact on slopes by increasing the amount of coarse colluvium that traps and preserves eolian material. Accretion …
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Design and characterization of a smart bit for in-situ force measurement, using capacitive load cells and acoustic spectra analysis to determine rock type and tool wear in rock excavation process
… methods for determining tool wear and material type with a sensing system, which would enable operators to make decisions using objective feedback from a safer location. Continuous mining machine operators must determine tool wear and material type during operation, and they place themselves at …
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Design and characterization of a smart bit for in-situ force measurement, using capacitive load cells and acoustic spectra analysis to determine rock type and tool wear in rock excavation process
… methods for determining tool wear and material type with a sensing system, which would enable operators to make decisions using objective feedback from a safer location. Continuous mining machine operators must determine tool wear and material type during operation, and they place themselves at …
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Improving Reservoir Simulation Models by Incorporating Rock Types
Defining of rock types for a reservoir has been proven to be helpful when creating a geological model. Lab investigation helps in providing data and conclusions which when combined with Petro-physical properties aids in planning for future design based on permeability, porosity and rock quality. …
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Reservoir characterization and sedimentary architecture of the siliciclastic sediments in the southern Pletmos basin, South Africa
… into the reservoir mineralogical variation, rock type, depositional environment for accurate identification and quantification of the hydrocarbon
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Application of Pattern Recognition Techniques to Monitoring-While-Drilling on a Rotary Electric Blasthole Drill at an Open-Pit Coal Mine
… application of pattern recognition techniques to rock type recognition using monitoring-while-drilling data. The research is focused on data from a large electric blasthole drill operating in an open-pit coal mine. Pre-processing and normalization techniques are applied to minimize potential …
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Rock Drilling with impregnated diamond microbits
… rig was designed and used to drill a variety of rock types with impregnated diamond microbits. The rocks, selected to represent a wide range of properties, were characterised by optical petrography and by the measurement of uniaxial compressive strength and relative abrasion resistance. A …
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Characterization of lunar crust with moon mineralogy mapper data
… focuses: (1) identify the distribution of a new rock type (Mg-spinel lithology) on the Moon and explore the likely petrogenesis of Mg-spinel; (2) investigate the presence of olivine in the crater central peaks and analyze the sources of olivine; (3) determine the compositional variations of lunar …
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Age and petrogenesis of the Striped Rock granite pluton: Blue Ridge province, southwestern Virginia
The Striped Rock granite pluton is an epizonal A-type intrusion emplaced into Grenville age gneisses at 748 Ma. Isotopic, petrographic, and textural evidence indicate that the facies comprising this pluton are differentiates of a homogeneous magrna and not the result of multiple intrusions. …
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Investigating the Occurrence and Effects of Fragmentation: Analysis of Rockfall Videos Captured During Slope Maintenance Campaigns
Rockfall is a gravity-driven natural hazard common in mountainous areas, that poses a risk to infrastructure and human life. Understanding rockfall frequency and potential trajectories are essential for the safe design of roads and railways. This is traditionally through analysis of the slope and …
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Tectonic and Climatic Controls on Continental River Systems
… show that climate controls the degree to which rock type affects erosion through transport limitations, with arid regions showing a much weaker dependence on rock type than humid regions. This complexity is not captured by typical models of river erosion. In the second chapter, I study the …
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The planning of a South African airborne synthetic aperture radar measuring campaign
… surface moisture mapping, vegetation mapping, rock type discrimination and Digital Elevation Modelling. Since these applications have considerable scientific and economic benefits, the Radar Remote Sensing Group at the University of Cape Town committed themselves to an airborne SAR campaign. …
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An improved approach for quantifying the impact of geological uncertainty and modelling decisions on static and dynamic reservoir models - a case study from a giant fractured carbonate reservoir
… presence of fractures, the approach to reservoir rock type, and the modelling of the initial hydrocarbon distribution were examined. This workflow was applied to one of the giant complex carbonate reservoirs known to be fractured with a thick transition zone in the Middle East. The most …
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Field Indicators for the Prediction of Appalachian Soil and Bedrock Geochemistry
… to simple field indicators, such as color or rock type. I hypothesized that these indicators can accurately predict certain geochemical properties. Thirty-three vertical weathering sequences were sampled from eight surface mines throughout the Central Appalachian coalfields, for a total of 204 …
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Natural state modelling of a vapor dominated system : case study Darajat, Indonesia
… in lateral distribution of reservoir rocks and cap rock in Darajat conceptual model. Meanwhile, the most recent MEQ distribution suggests the latest delineation of Darajat base of reservoir, which improves the conceptual model’s understanding of vertical extension. The improved …
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Studying signatures of water on Mars at two macro and micro scales : orbital analyses of hillslope geomorphology and ChemCam calibration for surficial rock chemistry
… second set of studies, carbonate minerals and rock coatings and rinds were measured by LIBS in a simulated martian environment to better understand the signature of these materials on Mars. This work is in preparation for the Mars Science Laboratory (MSL) rover mission, in which a LIBS …
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A systemic analysis of the factors that affect handpump-borehole yield and water quality in rural sub-Saharan Africa
… yield and water quality failure (for example, rock type and handpump and borehole materials). Data from Ethiopia, Malawi, and Uganda are in the BN. Key findings from the BN analysis highlight the importance of borehole and cylinder depth, rock type, handpump parts, and borehole design when …
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Using wave attenuation techniques for monitoring of stress levels
… stress. Recently, it has also been applied to rock burst prediction and mine site investigations. Another parameter for investigating stress in rocks is the attenuation coefficient. Attenuation has been observed to be more sensitive to stress changes than wave velocity; however, the measurement …
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The effect of zero point charge environment on rock fracture behavior
… charge (ZPC) environment on fracture behavior of rocks. The material parameters selected for this purpose were fracture toughness and specific work of fracture. These properties were determined for three rock types in five environments. Semi-circular bend specimens of dolomitic limestone, Sioux …
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