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Articles 61 - 90 of 118
Full-Text Articles in Geological Engineering
Theory Of Development And Improvement Of The Mathematical Model Of The Methodology Of Public Control In The Management Of Occupational Safety And Industrial Risks, Aliakbar Khamidullaevich Rasulev, Sunnatilla Suleymanovich Suleymanov, Nodira Bakhadirzhanovna Gaibnazarova
Theory Of Development And Improvement Of The Mathematical Model Of The Methodology Of Public Control In The Management Of Occupational Safety And Industrial Risks, Aliakbar Khamidullaevich Rasulev, Sunnatilla Suleymanovich Suleymanov, Nodira Bakhadirzhanovna Gaibnazarova
Technical science and innovation
The article develops and analyzes a mathematical model based on a logical flowchart of the methodology of public control in the management of occupational safety and industrial risks and probability theory, according to the model, the results of compliance with the requirements of social cooperation on occupational safety lead to a sharp increase in the probability of reliability, management efficiency becomes higher. Analysis of the mathematical model of the developed logical flowchart based on probability theory has shown that when the parties cooperate to monitor the results of compliance with labor protection requirements, they lead to a sharp increase in …
Use Of Mathematical Skills For Technical Condition Assessment Of Power Autotransformers, Dilafruz Rustamjon Qizi Abdullabekova, Nurali Berdiyorovich Pirmatov
Use Of Mathematical Skills For Technical Condition Assessment Of Power Autotransformers, Dilafruz Rustamjon Qizi Abdullabekova, Nurali Berdiyorovich Pirmatov
Technical science and innovation
In this paper, we review innovative approaches to assess the technical condition of autotransformers using mathematical methods. The main purpose of these methods is to increase the efficiency of diagnostics and prevent possible failures in power systems. The developed mathematical expression is based on complex data analysis, application of statistical methods and machine learning technologies. This makes it possible to achieve more accurate and earlier detection of potential problems. As a result of these innovative approaches, the possibilities for early detection and prevention of faults are significantly increased. This is important for ensuring the smooth operation of power systems and …
A Study On The Influence Of Cutting Parameters On Surface Roughness And Visualization Through Contour Plots And 3d Surface Profiles, Zayniddin Nosirovich Muxiddinov
A Study On The Influence Of Cutting Parameters On Surface Roughness And Visualization Through Contour Plots And 3d Surface Profiles, Zayniddin Nosirovich Muxiddinov
Technical science and innovation
This research investigates the intricate relationship between cutting parameterscutting speed, feed rate, and depth of cut and surface roughness in machining processes. Surface roughness is a key determinant of machined surface quality, and optimizing cutting parameters is crucial for achieving superior finishes. Employing advanced visualization techniques, including contour plots and 3D surface profiles, the study offers a comprehensive exploration of surface topography dynamics. Statistical analyses and regression modeling enhance the quantitative understanding of how cutting parameters interact to shape surface roughness. The research affirms the significant influence of cutting speed, feed rate, and depth of cut, providing practical insights for …
Seismicity Characteristics Of The Gulf Of Aqaba Seismogenic Zone And Their Hazard Implications In Northwestern Saudi Arabia, Ali Abdelfattah, Mohamed Ezzelarab, Hazem Badreldin, Hassan Alzahrani, Saleh Qaysi, Bassam Abuamarah, Neil Lennart Anderson
Seismicity Characteristics Of The Gulf Of Aqaba Seismogenic Zone And Their Hazard Implications In Northwestern Saudi Arabia, Ali Abdelfattah, Mohamed Ezzelarab, Hazem Badreldin, Hassan Alzahrani, Saleh Qaysi, Bassam Abuamarah, Neil Lennart Anderson
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
The seismogenic characteristics of the Gulf of Aqaba zone have been assessed using the maximum likelihood method to estimate various earthquake recurrence parameters. These parameters encompass the β-value, annual recurrence rate (λ), and maximum probable magnitude (Mmax). This assessment has identified three sub-seismogenic zones, each corresponding to specific structural faults within the Gulf. These zones are associated with the Aragonese, Arnona and Aqaba faults, delineating pull-apart basin structures in the Gulf of Aqaba. An updated earthquake catalogue has been compiled using a unified moment magnitude (Mw) scale to improve the analysis, established by developing two empirical relationships. According to the …
Development Of Accurate Embedded Fracture Models For Naturally Fractured Reservoirs, Harun Ur Rashid
Development Of Accurate Embedded Fracture Models For Naturally Fractured Reservoirs, Harun Ur Rashid
LSU Doctoral Dissertations
Natural fractures play a critical role in the performance of unconventional oil, gas, and geothermal reservoirs due to their prevalent occurrence within these systems. However, modeling these fractures accurately and efficiently is still challenging. This work centers on an extensive analysis of naturally fractured systems and proposes new fracture modeling algorithms that can predict the performance of fractured tight rocks accurately and efficiently. Several researchers have explored various methodologies to accurately and efficiently model fractured reservoirs. Among the approaches that can account for each individual fracture in these reservoirs, the embedded discrete fracture model (EDFM) is one of the most …
Soil Nitrate Prediction Using Ftir-Atr, Vis-Nir, And Raman Spectroscopy, Sabiha Ferdous
Soil Nitrate Prediction Using Ftir-Atr, Vis-Nir, And Raman Spectroscopy, Sabiha Ferdous
Department of Agricultural and Biological Systems Engineering: Dissertations, Theses, and Student Research
Fourier transform infrared spectroscopy (FTIR) combined with Attenuated total reflectance (ATR), Visible-Near Infrared spectroscopy (Vis-NIR), and Raman spectroscopy (RS) are non-destructive techniques for rapid determination of nitrogen compounds in soil. Leveraging FTIR-ATR and Vis-NIR spectra using partial least squares regression (PLSR) modeling, the study aims to predict soil nitrate content and explored the feasibility of Raman spectroscopy to detect nitrate (NO3-), nitrite (NO2-), and ammonium (NH4+) in soil. Soil samples were collected from four different fields, dried, sieved (2mm), and then used for collecting spectra (FTIR-ATR and Vis-NIR). Laboratory analysis was …
Laboratory Evaluation Of High-Temperature Resistant Lysine-Based Polymer Gel Systems For Leakage Control, Tao Song, Xuyang Tian, Baojun Bai, Yugandhara Eriyagama, Mohamed Ahdaya, Adel Alotibi, Thomas P. Schuman
Laboratory Evaluation Of High-Temperature Resistant Lysine-Based Polymer Gel Systems For Leakage Control, Tao Song, Xuyang Tian, Baojun Bai, Yugandhara Eriyagama, Mohamed Ahdaya, Adel Alotibi, Thomas P. Schuman
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
In-situ crosslinking gel known for its cost-effectiveness, has been employed for decades to plug high-permeability features in subsurface environments. However, some commonly used crosslinkers are being phased out due to the increasingly rigorous environmental regulations. As a newly discovered environmentally friendly crosslinker, lysine can crosslink the partially hydrolyzed polyacrylamide through transamidation reaction. The present work aimed to study the effect of polymer composition and concentration on the gelation behavior of lysine and high molecular weight acrylamide-based polymers. Several commercial high molecular weight polymers with different contents of 2-Acrylamido-2-methyl-1-propane sulfonic acid (AMPS) including AN-105/125, SAV-55/37/28, and SAV-10 were deployed in this …
Inverting Geodetic Strain Rates For Slip Deficit Rate In Complex Deforming Zones: An Application To The New Zealand Plate Boundary, Kaj M. Johnson, Laura M. Wallace, Jeremy Maurer, Ian Hamling, Charles Williams, Chris Rollins, Matt Gerstenberger, Russ Van Dissen
Inverting Geodetic Strain Rates For Slip Deficit Rate In Complex Deforming Zones: An Application To The New Zealand Plate Boundary, Kaj M. Johnson, Laura M. Wallace, Jeremy Maurer, Ian Hamling, Charles Williams, Chris Rollins, Matt Gerstenberger, Russ Van Dissen
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
The potential for future earthquakes on faults is often inferred from inversions of geodetically derived surface velocities for locking on faults using kinematic models such as block models. This can be challenging in complex deforming zones with many closely spaced faults or where deformation is not readily described with block motions. Furthermore, surface strain rates are more directly related to coupling on faults than surface velocities. We present a methodology for estimating slip deficit rate directly from strain rate and apply it to New Zealand for the purpose of incorporating geodetic data in the 2022 revision of the New Zealand …
Layered Mantle Flow Field Associated With Plate Kinematics And Slab Modulation Underneath The Horseshoe-Shaped Banda Arc-Islands, Sijia Li, Fansheng Kong, Kelly H. Liu, Stephen S. Gao
Layered Mantle Flow Field Associated With Plate Kinematics And Slab Modulation Underneath The Horseshoe-Shaped Banda Arc-Islands, Sijia Li, Fansheng Kong, Kelly H. Liu, Stephen S. Gao
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
The Banda Arc-Continent Collision Zone Signifies One Of The Most Seismically Active And Tectonically Intricate Zones. The High Convergence Rate Across The Region, Coupled With The Exceptionally Arcuate Arc And Subducted Slab, Makes It An Ideal Locale For Investigating Interactions Between Plate (Slab) Kinematics And Plastic Flow In The Asthenosphere, Which Can Be Diagnosed By Seismic Anisotropy From Shear Wave Splitting Analyses. In Total, 206 Pairs Of Splitting Measurements Using Teleseismic SKS, SKKS, And PKS, Along With 43 Pairs Using Local S Phases, Are Obtained By Utilizing Broadband Seismic Data From Five Permanent Seismic Stations. To Reduce The Ambiguity In …
Development Of Inorganically Cross-Linked Sulfonated Polyacrylamide Preformed Particle Gels For Conformance Control: Impact Of Anionic Groups, Reem Elaf, Ahmed Hamza, Hassan Nimir, Mohammed Saad, Ibnelwaleed A. Hussein, Baojun Bai
Development Of Inorganically Cross-Linked Sulfonated Polyacrylamide Preformed Particle Gels For Conformance Control: Impact Of Anionic Groups, Reem Elaf, Ahmed Hamza, Hassan Nimir, Mohammed Saad, Ibnelwaleed A. Hussein, Baojun Bai
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
Modern oil and gas extraction faces challenges, notably from the surplus of produced water, hampering hydrocarbon recovery and raising environmental and economic concerns. A promising solution is the injection of preformed particle gels (PPGs) into the reservoir's fractures and high permeability zones, facilitating production processes. This study introduces a novel class of inorganically cross-linked PPGs with exceptionally high swelling capacities, comprising sulfonated polyacrylamide cross-linked with aluminum attached to acetate, nitrate, sulfate, and lactate anions individually. These PPGs function as superabsorbents, capable of absorbing water at a ratio of 100-700 times their dry weight while maintaining adequate gel strength up to …
Geodetic Strain Rates For The 2022 Update Of The New Zealand National Seismic Hazard Model, Jeremy Maurer, Kaj Johnson, Laura M. Wallace, Ian Hamling, Charles A. Williams, Chris Rollins, Matt Gerstenberger, Russ Van Dissen
Geodetic Strain Rates For The 2022 Update Of The New Zealand National Seismic Hazard Model, Jeremy Maurer, Kaj Johnson, Laura M. Wallace, Ian Hamling, Charles A. Williams, Chris Rollins, Matt Gerstenberger, Russ Van Dissen
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
Geodetic data in plate boundary zones reflect the accrual of tectonic strain and stress, which will ultimately be released in earthquakes, and so they can provide valuable insights into future seismic hazards. To incorporate geodetic measurements of contemporary deformation into the 2022 revision of the New Zealand National Seismic Hazard Model 2022 (NZ NSHM 2022), we derive a range of strain-rate models from published interseismic Global Navigation Satellite Systems velocities for New Zealand. We calculate the uncertainty in strain rate excluding strain from the Taupō rift–Havre trough and Hikurangi subduction zone, which are handled separately, and the corresponding moment rates. …
Upper Plate And Subduction Interface Deformation Models In The 2022 Revision Of The Aotearoa New Zealand National Seismic Hazard Model, Russ J. Van Dissen, Kaj M. Johnson, Hannu Seebeck, Laura M. Wallace, Chris Rollins, Jeremy Maurer, Matthew C. Gerstenberger, Charles A. Williams, Ian J. Hamling, Andrew Howell, Christopher J. Dicaprio
Upper Plate And Subduction Interface Deformation Models In The 2022 Revision Of The Aotearoa New Zealand National Seismic Hazard Model, Russ J. Van Dissen, Kaj M. Johnson, Hannu Seebeck, Laura M. Wallace, Chris Rollins, Jeremy Maurer, Matthew C. Gerstenberger, Charles A. Williams, Ian J. Hamling, Andrew Howell, Christopher J. Dicaprio
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
As part of the 2022 revision of the Aotearoa New Zealand National Seismic Hazard Model (NZ NSHM 2022), deformation models were constructed for the upper plate faults and subduction interfaces that impact ground-shaking hazard in New Zealand. These models provide the locations, geometries, and slip rates of the earthquake-producing faults in the NZ NSHM 2022. For upper plate faults, two deformation models were developed: a geologic model derived directly from the fault geometries and geologic slip rates in the NZ Community Fault Model version 1.0 (NZ CFM v.1.0); and a geodetic model that uses the same faults and fault geometries …
Is Geology Accreditation Needed? It Is Already Here!, Laurie C. Anderson, John S. Gierke, Jeffrey B. Connelly
Is Geology Accreditation Needed? It Is Already Here!, Laurie C. Anderson, John S. Gierke, Jeffrey B. Connelly
Michigan Tech Publications
No abstract provided.
Optimization Of Vibro-Seismic Parameters For Enhanced Oil Recovery Application, Tarek Abdel Aal
Optimization Of Vibro-Seismic Parameters For Enhanced Oil Recovery Application, Tarek Abdel Aal
Theses and Dissertations
This thesis was conducted in the American University in Cairo by Tarek Ahmed Abdel Fattah Abdel Aal. The thesis is titled ‘Optimization of Vibroseismic Parameters for Enhanced Oil Recovery Application.’ The thesis discusses whether or not the combination of optimized physical vibration parameters with waterflooding would improve porosity, absolute permeability, relative permeability, and recovery when compared with just classical waterflooding. The optimized physical vibration parameters as well as methodology was used from a previous paper that was performed in conjunction with my thesis advisor on similar core samples. The experimentation was performed on five core samples with different porosities and …
Research On An Improved Cotton Cleaner Unit, Muzaffar Djurayev, Sherqul Hakimov, Ilhom Abbazov, Rashid Kaldybaev
Research On An Improved Cotton Cleaner Unit, Muzaffar Djurayev, Sherqul Hakimov, Ilhom Abbazov, Rashid Kaldybaev
Technical science and innovation
This article analyzes the results of changes to the working parts of a cotton cleaning unit from small and large impurities. It is known that the UXK installation uses continuous cleaning technology, that is, the cotton entering the purifier is cleaned in all its cleaning sections and then transferred to another process. In these sections, pieces of cotton wool from the separated waste are regenerated in a separate drum. Existing purifier suppliers use a manually operated mechanical system to monitor its performance. These factors do not make it possible to control the cleaning process when the quality indicators of cotton …
Ground Settlements Due To Quad Water Tunnel Construction, Marawan M. Shahien M. Shahein, Ehab Ahmed Khalil E.Khalil, Ahmed F. Abd El Kader A. Abd El Kader, Mahmoud Abdulnasser Hodeab M.A.Nasser
Ground Settlements Due To Quad Water Tunnel Construction, Marawan M. Shahien M. Shahein, Ehab Ahmed Khalil E.Khalil, Ahmed F. Abd El Kader A. Abd El Kader, Mahmoud Abdulnasser Hodeab M.A.Nasser
Journal of Engineering Research
Construction of a tunnel under an existing one poses significant geotechnical challenges due to the potential surface and subsurface settlements caused by the new tunnel construction and its impact on the existing tunnel, adjacent buildings, and facilities. The complexity intensifies when multiple adjacent tunnels need to be constructed, such as twin, triplet, quad, or more, as the construction of each tunnel affects the others. This interaction depends on various factors, including the horizontal distance between each tunnel (pillar width), the tunnel's depth and vertical position relative to the existing tunnel (pillar depth), and their influence on surface and subsurface settlement …
Suitability Of The Height Above Nearest Drainage (Hand) Model For Flood Inundation Mapping In Data-Scarce Regions: A Comparative Analysis With Hydrodynamic Models, Navin Tony Thalakkottukara, Jobin Thomas, Melanie Watkins, Benjamin C. Holland, Thomas Oommen, Himanshu Grover
Suitability Of The Height Above Nearest Drainage (Hand) Model For Flood Inundation Mapping In Data-Scarce Regions: A Comparative Analysis With Hydrodynamic Models, Navin Tony Thalakkottukara, Jobin Thomas, Melanie Watkins, Benjamin C. Holland, Thomas Oommen, Himanshu Grover
Michigan Tech Publications
Unprecedented floods from extreme rainfall events worldwide emphasize the need for flood inundation mapping for floodplain management and risk reduction. Access to flood inundation maps and risk evaluation tools remains challenging in most parts of the world, particularly in rural regions, leading to decreased flood resilience. The use of hydraulic and hydrodynamic models in rural areas has been hindered by excessive data and computational requirements. In this study, we mapped the flood inundation in Huron Creek watershed, Michigan, USA for an extreme rainfall event (1000-year return period) that occurred in 2018 (Father’s Day Flood) using the Height Above Nearest Drainage …
Improvement Of Convective Drying Equipment, A Ponasenko, Jasur Safarov, Shaxnoza Sultanova
Improvement Of Convective Drying Equipment, A Ponasenko, Jasur Safarov, Shaxnoza Sultanova
Technical science and innovation
Drying of agricultural raw materials is an energy-consuming but integral process. Therefore, increasing the efficiency of drying and improving the quality indicators of dried material at minimum material and energy costs is relevant for producers of agricultural products. By present time numerous researches on improvement of constructions and processes of work of dryers providing satisfactory parameters of energy saving have been carried out. In some scientific materials it is shown that the use of generative gas and straw as fuel allows to reduce energy costs for the drying process in the fluidised bed dryer by 10-30%, the quality of seeds …
Existing Methods For Monitoring Power Autotransformers, Nurali Berdiyorovich Pyrmatov, Dilafruz Rustamjon Qizi Abdullabekova
Existing Methods For Monitoring Power Autotransformers, Nurali Berdiyorovich Pyrmatov, Dilafruz Rustamjon Qizi Abdullabekova
Technical science and innovation
autotransformers, methods, diagnostics, efficiency, monitoring.Particular attention is given to analyzing the gas composition of transformer oil, which is a sensitive indicator of various defects such as thermal breakdown and heating. In addition, methods based on the measurement of external magnetic field strength are discussed. This technique provides a unique opportunity to detect magnetic anomalies associated with possible defects in the structural components of the transformer. The article emphasizes that successful monitoring requires an integrated approach, combining different techniques. The authors analyze the advantages and limitations of each method and offer practical recommendations for integrating these methods into maintenance systems. In …
Mathematical Modeling Of Fruit Drying And System Analysis Of The Process (On The Example Of Persimmon), Gani Dadayev, Jasur Safarov, Shakhnoza Sultanova, Qobiljon Muxiddinov
Mathematical Modeling Of Fruit Drying And System Analysis Of The Process (On The Example Of Persimmon), Gani Dadayev, Jasur Safarov, Shakhnoza Sultanova, Qobiljon Muxiddinov
Technical science and innovation
Vegetable raw materials, as an object of drying, are characterized by a large amount of water and a low content of dry substances. Vegetable raw materials have a capillary-porous structure. Food products contain both bound and free moisture at the same time. The removal of moisture from the material during drying depends on the total moisture content and the form of connection of moisture with the material. Adsorption and osmotic - bound moisture is retained at the interface of colloidal particles with the environment. Food products contain both bound and free moisture at the same time. The quantitative ratio between …
Capacitive Electrode Based Moisture Measurement Converter Errors And How To Eliminate Them, Hamdam Jabborov, Temurbek Rashidov
Capacitive Electrode Based Moisture Measurement Converter Errors And How To Eliminate Them, Hamdam Jabborov, Temurbek Rashidov
Technical science and innovation
The article discusses the errors associated with the moisture measuring transducer that is based on the cylindrical electrode, along with their sources and calculation formulas for error elimination. The initial capacitance of the capacitive electrode humidity converter is dependent on its geometric parameters, such as the radii of the electrodes and their length. Accurate calculation of these geometric parameters enables the reduction of regular measurement errors in the input and switching circuit of the moisture converter to a minimum value, resulting in a significant increase in the informativeness and accuracy of the output signal. Consequently, some sources of measurement errors …
Influence Of Foil Stamping Parameters On Image Quality, Khalima Abishevna Babakhanova, Mukhlisa Ergashevna Khasanova, Aziz Azimjonovich Soadatov, Nigora Junaydullaevna Sadriddinova
Influence Of Foil Stamping Parameters On Image Quality, Khalima Abishevna Babakhanova, Mukhlisa Ergashevna Khasanova, Aziz Azimjonovich Soadatov, Nigora Junaydullaevna Sadriddinova
Technical science and innovation
The paper evaluates the influence of technological process parameters, namely die temperature and pressure force, on the quality of foil stamping, which is one of the types of finishing having a wide range of applications due to giving unique decorative and protective elements to printed products. When evaluating the influence of process parameters on the linearity and coverability of the image, it was found that the pressure force has less influence on the result than the temperature. According to the data of the study, it can be concluded that the maximum percentage of completeness of covering is achieved at a …
Evaluation Of Hydrophobic Materials For Stabilizing Expansive Soils, Suman Shrestha
Evaluation Of Hydrophobic Materials For Stabilizing Expansive Soils, Suman Shrestha
Civil Engineering Theses - Archive
The swelling and shrinkage of the expansive soil as a response to moisture change is one of the significant challenges posed to infrastructure projects. The significant economic damage that is caused by the expansive soil, as well as its abundance in nature, has prompted various scientists and engineers all around the world to actively search for new and improved methods for stabilizing it. Various traditional methods, such as lime and cement treatment, have been used extensively to stabilize expansive soils and mitigate their harmful effects on the infrastructure. Although these methods are quite often effective and various studies have been …
Pseudo-Three-Dimensional Back-Analysis Of Rainfall-Induced Landslides In Utuado, Puerto Rico, Mirna Kassem, Weibing Gong, Dimitrios Zekkos, Marin Clark, Stephen Hughes
Pseudo-Three-Dimensional Back-Analysis Of Rainfall-Induced Landslides In Utuado, Puerto Rico, Mirna Kassem, Weibing Gong, Dimitrios Zekkos, Marin Clark, Stephen Hughes
Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works
Regional slope stability analyses can provide a system-level assessment of landslide susceptibility. This study aims to develop a regional back-analysis model for rainfall-induced landslides to compute ground shear strength that can be used for landslide prediction. Most commonly, mechanistic-based models for regional slope stability consist of simplified one-dimensional (1D) analyses compared to more realistic three-dimensional (3D) procedures. A pseudo-3D methodology is applied on 788 landslides over two 2.5 km2 areas in the plutonic rocks of the Utuado Batholith. First, an infinite slope stability triggering model is applied on a 1 m-resolution digital elevation model (DEM) to identify the triggering grid …
Simulation Of Wave Propagation In Granular Particles Using A Discrete Element Model, Syed Tahmid Hussan
Simulation Of Wave Propagation In Granular Particles Using A Discrete Element Model, Syed Tahmid Hussan
College of Graduate Studies: Theses & Dissertations
The understanding of Bender Element mechanism and utilization of Particle Flow Code (PFC) to simulate the seismic wave behavior is important to test the dynamic behavior of soil particles. Both discrete and finite element methods can be used to simulate wave behavior. However, Discrete Element Method (DEM) is mostly suitable, as the micro scaled soil particle cannot be fully considered as continuous specimen like a piece of rod or aluminum. Recently DEM has been widely used to study mechanical properties of soils at particle level considering the particles as balls. This study represents a comparative analysis of Voigt and Best …
Pit Design And Mine Planning Of Nong Wa Sub-Basin, Sin Pun Coal Deposit, Southern Thailand, Gbenga Timilehin Adewumi
Pit Design And Mine Planning Of Nong Wa Sub-Basin, Sin Pun Coal Deposit, Southern Thailand, Gbenga Timilehin Adewumi
Chulalongkorn University Theses and Dissertations (Chula ETD)
Nong Wa is a sub-basin located within the Sin Pun coal deposit, which has no history of mining activities. This study focused on the planning and design of the sub-basin pit, potentially paving the way for future mining operations in the region. The objective of the research was to evaluate the economic viability of coal extraction and to develop an optimized pit to maximize resource recovery. To achieve this objective, a coal seam model of the deposit was created using advanced modeling software such as AutoCAD and MineSight. The seam model was used to design the ultimate pit, pushback, and …
Enhance Effectiveness Of Monitoring Scheme Using Insar On Tailings Storage Facility No. 2, Chatree Gold Mine, Thailand, Shanghai Chea
Enhance Effectiveness Of Monitoring Scheme Using Insar On Tailings Storage Facility No. 2, Chatree Gold Mine, Thailand, Shanghai Chea
Chulalongkorn University Theses and Dissertations (Chula ETD)
Tailings storage facility (TSF) is a critical component of the mining industry, serving to safely contain waste generated during mineral extraction. At Chatree Gold Mine, the largest and only active gold mine in Thailand, TSF No.2 handles approximately 5 million tons of tailings annually. Effective monitoring of the facility is crucial for hazard prevention and regulatory compliance. This study aims to enhance the monitoring scheme of TSF No.2 by employing Small Baseline Subset Interferometric Synthetic Aperture Radar (SBAS-InSAR) technique, processed via MintPy software, to analyze ground deformation. Despite traditional monitoring methods, such as in-situ geodetic surveying, offering valuable insights, they …
Recovery Of Tin From Kaolin Mine Tailing, Rangoon, Thailand, Archana Pandit
Recovery Of Tin From Kaolin Mine Tailing, Rangoon, Thailand, Archana Pandit
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study investigates the recovery of tin from kaolin waste using gravity, electrostatic, and magnetic separation techniques. A total of 123.500 kg of sand and 103.200 kg of silt were processed using a shaking table, spiral concentrator, high-tension separator, induced roll magnetic separator, and Frantz magnetic separator. Mineralogical and chemical characterization was conducted using X-ray diffractometer (XRD), X-ray fluorescence (XRF), and microscopic analysis to determine tin distribution and occurrence. Experimental results showed that the silt fractions generally exhibited higher tin content than the sand fractions. In this study, Case A refers to the samples (Sand A and Silt A) processed …
Simulation On Acid Gas Removal From Natural Gas Processing With Membrane And Absorption Process, Ratikorn Sornumpol
Simulation On Acid Gas Removal From Natural Gas Processing With Membrane And Absorption Process, Ratikorn Sornumpol
Chulalongkorn University Theses and Dissertations (Chula ETD)
The comparison using simulations of CO₂ removal from natural gas via membrane separation and monoethanolamine (MEA) absorption has been studied. The membrane model is applied with the single- and two-stage configurations over feed pressures 3,000–9,000 kPa, temperatures 10–59 °C, CO₂ concentrations 20–70 mol %, membrane areas 2,500–5,500 m², and flows 331,800–580,600 m³/h. At 10 °C feed temperature, CO₂ permeability is enhanced while CH₄ selectivity improves slightly, increasing CO₂ capture efficiency up to 74 % with only minor methane losses, though at the cost of higher refrigeration duty. The 10 °C operation also leads to stronger driving force across the membrane, …
Estimation Of Mechanical Behavior Of Unsaturated Soils From A Soil-Water Characteristic Curve, Lucas Acheampong
Estimation Of Mechanical Behavior Of Unsaturated Soils From A Soil-Water Characteristic Curve, Lucas Acheampong
Theses and Dissertations--Civil Engineering
The small-strain shear modulus and shear strength are two crucial mechanical behaviors used in the design of geotechnical structures and in the analyses of earth materials subjected to static and dynamic loadings. Traditional testing methods for these parameters are expensive and time-consuming. This research aimed to address these challenges by developing a model based on the inverse relationship between mechanical behavior of unsaturated soils and the soil-water characteristic curve (SWCC). The proposed model integrates a scaling function to align the SWCC with the mechanical property curve. Empirical relationships were established for the scaling function, specifically aligning with the air-entry value …