Characterization Of Peak Shear Strength Of Rough Rock Joints Using The Limited Displacement Multi-Stage Direct Shear (Ldmsd) Test Method, Michael Petro
Graduate Theses & Non-Theses
Current standardized direct shear test methods for rock joints do not account for damage caused to the individually unique asperity profiles of each sample. Current test methods require either a single sample to be sheared to large displacements under successive normal stresses, or the use of similar samples in multiple tests. Successive shearing of a single sample damages surface asperities and causes the overall roughness profile of the sample to change, reducing peak shear stress and consequently resulting in underestimation of friction angle and overestimation of joint shear intercept (cohesion). Obtaining joint surface specimens with identical roughness and geometry is ...
Mountain Front Recharge In A Semi-Arid Climate, Southwest Montana, 2018 Montana Tech
Mountain Front Recharge In A Semi-Arid Climate, Southwest Montana, Charles Shama
Graduate Theses & Non-Theses
Groundwater recharge to regional valley benches originates largely from adjacent Mountain Front Recharge (MFR). The Madison Valley in Southwest Montana is a semi-arid cold climate that receives 31.75cm annual valley precipitation. In this study, two drainages are characterized and compared, looking at the hydrological processes between the stream and groundwater. North Meadow Creek is a high elevation stream dominated by snowmelt and contains reaches of gaining and losing surface water to groundwater. Daylight Creek is a spring fed disconnected stream. Methods used a surface water balance, temperature as an environmental tracer and two and three component mixing models to ...
Uav-Based Geotechnical Modeling And Mapping Of An Inaccessible Underground Site, Elizabeth Anne Russell
Graduate Theses & Non-Theses
Digital photogrammetry is becoming a more common method used for mapping geological and structural rock mass features in underground mining. The issue of capturing geological and structural data in inaccessible, unsupported areas of mines remains even when utilizing terrestrial photogrammetric methods; thus, geotechnical models of mines are left with incomplete datasets. Large unsupported underground voids, like stopes, have the potential to cause major failures, but by filling in the geotechnical data gaps in inaccessible areas, potential failures can be predicted through kinematic analysis of the area’s mapped discontinuities. Implementation of Unmanned Aerial Vehicles (UAVs) in underground mines and recent ...
Bathymetry Data For Lakes Azuei And Enriquillo, 2018 CUNY City College
Bathymetry Data For Lakes Azuei And Enriquillo, Michael Piasecki, Mahrokh Moknatian
Publications and Research
This data set supports and forms the basis for the development of Digital Bathymetry Models (DBM) for Lakes Azuei (Haiti) and Enriquillo (Dominican Republic). Bathymetric Data is typically acquired using Sonar devices that measure the depth at specific points along a boat track and for which the longitude and latitude is recorded. From the resulting point cloud one develop a seamless representation of the floor of the lake on either a raster set (which is what we have done) or try to use a contour (vector representation) model in which the depth contours appear as polygons or -lines. The raw ...
Cenozoic Tectono-Stratigraphic Evolution And Petroleum System Of The Eastern Cordillera Foothills And Adjacent Basins (Colombia), 2018 University of South Carolina
Cenozoic Tectono-Stratigraphic Evolution And Petroleum System Of The Eastern Cordillera Foothills And Adjacent Basins (Colombia), Essam Saeid
Theses and Dissertations
New gravity, magnetic, well and 3D seismic data provides a better understanding of regional structures and tectonic movement affecting the petroleum system and sedimentary history of an important region of oil production in the Foothills of the Eastern Cordillera of Colombia. To the south the Garzón fault was previously interpreted as a right-lateral strikeslip fault. New seismic, well, and gravity data demonstrate that this fault is also a low-angle (12–17 degrees) Andean fault that thrusts PreCambrian basement 10 to 17 km northwestward over Miocene rocks of the Upper Magdalena Valley (UMV) in a prospective footwall anticline. New geophysical data ...
Imaging The Subsurface In Eastern Part Of Lake Chesterfield Using A Combination Of Geophysical Tools, 2018 Missouri University of Science and Technology
Imaging The Subsurface In Eastern Part Of Lake Chesterfield Using A Combination Of Geophysical Tools, Jiawei Li
"The Lake Chesterfield North Dam in Wildwood city, Missouri has been leaking, more or less continuously since the dam was constructed in 1986 despite mitigation efforts in 1988, 1994, 1995, 2004, and 2005. Neither the grouting efforts in 1988, 1994, 1995, 2004 or 2005, nor the placement and rehabilitation of an impervious clay liner in 2005 has solved the problem. Indeed, in June of 2017, the water level in Lake Chesterfield dropped at an alarmingly rapid rate.
Prior to authorizing additional mitigation work, the Lake Chesterfield Home Owners Association (LCHOA) decided to acquire geophysical data across the dry lake bed ...
Gis-Based Spatial Analysis Coupled With Geophysical Imaging To Identify And Evaluate Factors That Control The Formation Of Karst Sinkholes In Southwestern Missouri, 2018 Missouri University of Science and Technology
Gis-Based Spatial Analysis Coupled With Geophysical Imaging To Identify And Evaluate Factors That Control The Formation Of Karst Sinkholes In Southwestern Missouri, Shishay T. Kidanu
"Sinkholes are inherent features of the karst terrain underlying much of Greene County, Missouri. These features present hazards and engineering challenges to existing infrastructure unknowingly constructed on a seemingly benign ground surface. The primary objective of this research was to investigate the physical processes chiefly responsible for triggering the seemingly random distribution of sinkholes in the study area. This research employed an integrated approach encompassing regional scale GIS-based spatial analyses and site-specific geophysical data. GIS-based spatial analysis was employed to identify significant physical factors that appeared to influence the formation and distribution of sinkholes. Seven out of the twelve most ...
Phosphate As A Control On Schwertmannite Stability, Iron Mineralogy And Anaerobic Biogeochemistry In Acid-Sulfate Systems, 2018 Southern Cross University
Phosphate As A Control On Schwertmannite Stability, Iron Mineralogy And Anaerobic Biogeochemistry In Acid-Sulfate Systems, Valerie A. Schoepfer
Schwertmannite is a common iron (Fe) mineral in acid sulfate soils and acid mine drainage systems, where it plays an important role in controlling acidity dynamics, iron and sulfur biogeochemistry, and trace metal mobility. Phosphate (PO43-) is commonly found in schwertmannite-bearing systems (i.e. from runoff or internal phosphorus cycling) and readily sorbs with schwertmannite.
The overarching objectives of this thesis were 1) to examine the effects of PO43- on schwertmannite stability and its transformation to secondary iron minerals under different environmental scenarios, and 2) to determine the fate of PO43- as schwertmannite undergoes ...
The Utility Of Geophysical Techniques To Image The Shallow Subsurface In Karst Areas In Missouri, 2018 Missouri University of Science and Technology
The Utility Of Geophysical Techniques To Image The Shallow Subsurface In Karst Areas In Missouri, Nathainail Bashir
"This dissertation is composed of three papers, which are focused on the utility of geophysical techniques to imaging the shallow subsurface in karst areas in Missouri.
In the first paper, ground penetrating radar (GPR) and time domain electromagnetic metal detector (TDEM-MD) methods were effectively deployed in an investigation of the cemetery with the intent of locating unmarked graves. The outcome of this study is to expand the knowledge of GPR and TDEM-MD methods, to locate unmarked graves in cemeteries. The study concluded that the GPR method is superior than TDEM-MD to locate buried caskets in cemetery investigations.
In the second ...
Empirical Correlations Between Rock Cutting Parameters And Excavated Rock Surface Rebound Hardness, 2018 Missouri University of Science and Technology
Empirical Correlations Between Rock Cutting Parameters And Excavated Rock Surface Rebound Hardness, Azupuri Germanus Ayerikujei Kaba
"In field excavation, cutting tools operate on rock surfaces damaged from previous tool pass, yet, average intact rock properties are often used in field project estimations. This can result in overestimation of excavation time and cost. The ability to accurately correlate the damaged rock properties to the excavation parameters means more reliable estimates of project completion time and costs, and hence improved the application of mechanical excavation technology to a wider range of civil and mining industries.
The purpose of this research was to better understand the relationship between rock cutting parameters and the excavated rock surface hardness during mechanical ...
Developing Improved Techniques For Gpr Guided Wave Data Analysis, 2018 Missouri University of Science and Technology
Developing Improved Techniques For Gpr Guided Wave Data Analysis, Yunyi Guan
"This study was conducted to investigate how limiting the allowable velocity range when analyzing guided wave data will affect the results of dielectric permittivity and thickness estimation. We conducted four sets of Experiments: an underlying layer of saturated organic loam is covered by incremental layers of the dry organic loam; a base layer of dry organic loam covered by the saturated organic loam; a saturated basal layer of silt with overlying dry silt layers, and a base layer of dry silt overlain by saturated silt layers to conduct a comparative study and perform three surveys for each of these three ...
Bridge Deck Assessment Using Visual Inspection, Ground Penetrating Radar, Portable Seismic Property Analyzer-Ultrasonic Surface Wave, Hammer Sounding And Chain Drag, 2018 Missouri University of Science and Technology
Bridge Deck Assessment Using Visual Inspection, Ground Penetrating Radar, Portable Seismic Property Analyzer-Ultrasonic Surface Wave, Hammer Sounding And Chain Drag, Abdullah Hadi Zaid Alhaj
"Integrated non-destructive techniques were utilized to assess the condition of a reinforced concrete bridge deck. There were two main objectives accomplished.
The first objective was to assess the integrity of the reinforced concrete bridge deck using four non-destructive techniques, namely visual inspection, ground penetrating radar, portable seismic property analyzer-ultrasonic surface wave, and hammer sounding and chain drag. Visual inspection data were used to identify signs of deterioration on surface of the bridge deck such as cracking, concrete leaching, and reinforcement corrosion. Ground penetrating radar data were used to determine the relative condition of the bridge deck. However, due to the ...
The Importance Of Chemical Grouting Materials For Optimum Mechanical Performance With Different Soil Conditions, 2018 Missouri University of Science and Technology
The Importance Of Chemical Grouting Materials For Optimum Mechanical Performance With Different Soil Conditions, Yusuf Alper Cinar
"Grouting is a frequently used technique for controlling the water inflow and reinforcement of soil and rock. Even though cement-based grouting materials have been well characterized, ongoing improvements of chemical grouting materials create a need to better understand the characteristics of these materials in order to increase the efficiency of grouting applications. The purpose of this study is to characterize three common chemical grouting materials by exploring their mechanical performance under varying initial soil conditions. Performance decision criteria consist of the Unconfined Compressive Strength (UCS) and slake durability test results, observation of penetration ability, and comparison of the findings. The ...
Toxicity Screening Of Biochar-Mineral Composites Using Germination Tests, 2018 University of Edinburgh, UK Biochar Research Centre, Edinburgh, United Kingdom
Toxicity Screening Of Biochar-Mineral Composites Using Germination Tests, Jan Mumme, Josephine Getz, Munoo Prasad, Ulf Lüder, Kern Jurgen, Ondrej Masek, Wolfram Buss
This study assessed the properties and toxicity (water cress germination trials) of 38 waste-derived, novel biochar-mineral composites (BMCs) produced via slow pyrolysis and hydrothermal carbonization (hydrochars). The biochars were produced from sewage sludge and compost-like output (CLO) by varying the type of mineral additive (zeolite, wood ash and lignite fly ash), the mineral-to-feedstock ratio and the carbonization process. While pure hydrochars completely inhibited germination of water cress, this effect was ameliorated by mineral additives. Seedlings grew best in pyrolysis chars and while wood ash addition decreased plant growth in many cases, 1:10 addition to CLO doubled germination rate. The ...
A Comparative Case Study Of Reflection Seismic Imaging Method, 2018 University of Mississippi
A Comparative Case Study Of Reflection Seismic Imaging Method, Moones Alamooti
Electronic Theses and Dissertations
Reflection seismology is the most common and effective method to gather information on the earth interior. The quality of seismic images is highly variable depending on the complexity of the underground and on how seismic data are acquired and processed. One of the crucial steps in this process, especially in layered sequences with complicated structure, is the time and/or depth migration of seismic data. The primary purpose of the migration is to increase the spatial resolution of seismic images by repositioning the recorded seismic signal back to its original point of reflection in time/space, which enhances information about ...
Using Artificial Intelligence And Machine Learning To Develop Synthetic Well Logs, Marwan Mohammed Alnuaimi
Graduate Theses, Dissertations, and Problem Reports
There has been an increase in the need for energy in the recent past. Oil and gas stand as the source of energy that are widely used. The oil and gas reservoirs are targeted for the purposes of field development. The conventional methods of reservoir characteristics require computing techniques that are unique and complex, some of which are labor and time intensive. Mohaghegh argues that all efforts must be tried and made possible to apply Petroleum Data analytics in production and management of reservoir so as to earn a maximum return (Mohaghegh, Shale Analytics, 2017). Different methodologies have been applied ...
Analyzing The Life-Cycle Of Unstable Slopes Using Applied Remote Sensing Within An Asset Management Framework, 2018 Michigan Technological University
Analyzing The Life-Cycle Of Unstable Slopes Using Applied Remote Sensing Within An Asset Management Framework, El Hachemi Y. Bouali
Dissertations, Master's Theses and Master's Reports
An asset management framework provides a methodology for monitoring and maintaining assets, which include anthropogenic infrastructure (e.g., dams, embankments, and retaining structures) and natural geological features (e.g., soil and rock slopes). It is imperative that these assets operate efficiently, effectively, safely, and at a high standard since many assets are located along transportation corridors (highways, railways, and waterways) and can cause severe damage if compromised. Assets built on or around regions prone to natural hazards are at an increased risk of deterioration and failure. The objective of this study is to utilize remote sensing techniques such as InSAR ...
Probabilistic Regional Landslide Hazard Assessment For The Enguri Dam (Jivari, Georgia), 2018 Michigan Technological University
Probabilistic Regional Landslide Hazard Assessment For The Enguri Dam (Jivari, Georgia), Maria Diletta Acciaro
Dissertations, Master's Theses and Master's Reports
The Enguri Dam forms a reservoir in a seismically active area in the foothills of the Caucasus Mountain range near Jvari, Georgia. The slopes are steep, highly fractured, and weathered, which make them at risk to failure during or following extreme rainfall events. Hydroelectricity produced by the water retained by the 271-m dam provides almost half of the electricity for the country. The reservoir perimeter is more than 40 km and the surrounding slopes span an area of more than 30 km2. The size of the area and paucity of slope data have made slope-failure hazard assessment of the broader ...
Reliability-Based Designs Procedure Of Earth Retaining Walls In Geotechnical Engineering, 2017 Universidad de Antioquia
Reliability-Based Designs Procedure Of Earth Retaining Walls In Geotechnical Engineering, Juan Camilo Viviescas, Juan Pablo Osorio, Julio E. Canon
The design and construction of foundations, retaining structures and slopes are usually based on deterministic formulations that do not allow the distinction between the natural variability and the inherent dispersion in the geotechnical parameters. Due to the inherent variability of the soil properties, there is a growing trend to implement reliability-based designs in geotechnical engineering to reduce design uncertainties by probabilistic methods. The reliability designs require the definition of the probability density functions of the geotechnical properties, as well as knowledge of the spatial variability of soils. This paper identifies the procedures, type of soil investigations, simulations and the most ...
Engineering Decision Making Under Uncertainties, 2017 Michigan Technological University
Engineering Decision Making Under Uncertainties, Snehamoy Chatterjee
Uncertainty is an inherent component of any engineering problem. Uncertainty comes at different stages of an engineering project with different level of complexities. Decision making by neglecting uncertainty may leads to an incorrect solution for a project. Our research focuses on identification and quantification of different sources of uncertainness, and bringing uncertainties within the decision making framework. We are developing algorithms for uncertainty evaluation of spatial and temporal data by integrating multiple source and multiple scale data types, and stochastic optimization models to take into account multiple objectives and constraints. We are applying our research on mining, geology, and geo-hydrology ...