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Full-Text Articles in Mining Engineering

Failure Analysis Of Abutment-Loaded Underground Coal Mine Stoppings During Explosion, Kutay E. Karadeniz, Dogukan Guner, Taghi Sherizadeh Jun 2024

Failure Analysis Of Abutment-Loaded Underground Coal Mine Stoppings During Explosion, Kutay E. Karadeniz, Dogukan Guner, Taghi Sherizadeh

Mining Engineering Faculty Research & Creative Works

Underground Mine Structures Like Mine Seals or Built-In-Place (BIP) Refuge Alternatives (RA) Are Exposed to Specific Loadings Like Explosions Because of overlying and Underlying Strata Conditions. Previous Studies Worked on the Vertical Loading Response of Structures Like Abutments from Panel Extraction But Not the Explosion Resistance Upon Being Subjected to These Vertical Strata Loads. in This Study, Two Steel-Reinforced Concrete Wall Designs as Seal and RA Applications Are Simulated to Examine the Performance and Failure Analysis under Abutment-Loading Conditions during an Explosion for a Coal Mine Model using Dynamic Analysis by a Distinct Element Code (3DEC). the Available Abutment Monitoring …

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Numerical Back Analysis Of An Underground Bulk Mining Operation Using Distributed Optical Fiber Sensors For Model Calibration, Samuel Nowak, Taghi Sherizadeh, Mina Esmaeelpour, Paul Brooks, Dogukan Guner, Kutay Karadeniz Mar 2024

Numerical Back Analysis Of An Underground Bulk Mining Operation Using Distributed Optical Fiber Sensors For Model Calibration, Samuel Nowak, Taghi Sherizadeh, Mina Esmaeelpour, Paul Brooks, Dogukan Guner, Kutay Karadeniz

Mining Engineering Faculty Research & Creative Works

Numerical Modeling Of Complex Underground Engineering Projects Such As Caverns, Tunnels, And Bulk Mining Zones Is An Essential Part Of The Design Phase. Large-Scale Models Require Significant Reductions In Complexity From The Real-World Scenario, Which Often Leads To Low Confidence In The Model Output. In This Work, A Mine-Scale Numerical Model Is Developed To Simulate A Room And Pillar Extraction Mining Operation. The Model Inputs Are Calibrated Through The Comparison Of The Model Response To Pillar Extraction In An Analogous Mine Geometry With Measured Strain Values Collected Using A Novel Distributed Optical Fiber Strain Sensing Technique After Pillar Extraction. Calibration …

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Advancing Occupational Health In Mining: Investigating Low-Cost Sensors Suitability For Improved Coal Dust Exposure Monitoring, Mirza Muhammad Zaid, Nana Amoah, Ashish Kakoria, Yang Wang, Guang Xu Feb 2024

Advancing Occupational Health In Mining: Investigating Low-Cost Sensors Suitability For Improved Coal Dust Exposure Monitoring, Mirza Muhammad Zaid, Nana Amoah, Ashish Kakoria, Yang Wang, Guang Xu

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Exposure to coal dust in underground coal mines poses significant health risks to workers, including the development of diseases such as coal workers' pneumoconiosis and silicosis. Current available methods for monitoring coal dust exposure are expensive and time-consuming, necessitating the exploration of alternative approaches. Low-cost light scattering particulate matter sensors offer a promising solution, and its development in recent years has demonstrated some success in air quality monitoring However, its application in sensing coal particles is limited partially due to that the operating condition in a mine is different than the atmosphere. Thus, the objective of this paper is to …

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Dielectric Permittivity Of Pzt 95/5 Ferroelectric Ceramics And 0.27pin-Pmn-0.26pt Single Crystals Under Pulsed High Electric Fields, Sergey I. Shkuratov, Jason Baird, Vladimir G. Antipov, Christopher S. Lynch Jan 2024

Dielectric Permittivity Of Pzt 95/5 Ferroelectric Ceramics And 0.27pin-Pmn-0.26pt Single Crystals Under Pulsed High Electric Fields, Sergey I. Shkuratov, Jason Baird, Vladimir G. Antipov, Christopher S. Lynch

Mining Engineering Faculty Research & Creative Works

The dependence of the dielectric permittivity of ferroelectric materials on electric field magnitude impacts the performance of ferroelectric devices. In a ferroelectric generator, a shock wave travels through the ferroelectric element and depolarizes it, and surface charges are released from the element electrodes, resulting in the generation of a megawatt power level for several microseconds. The dielectric properties of the compressed and uncompressed zones of the ferroelectric element affect the generated voltage and energy. The results of previous studies indicate that the low-field dielectric permittivity of poled Pb0.99(Zr0.95Ti0.05)0.98Nb0.02O3 (PZT 95/5) ferroelectrics in the uncompressed zone differs significantly from the high-field …

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The Influence Of Surfactants' Ionicity On The Performance Of Coal Dust Suppression, Zidong Zhao, Ping Chang, Apurna Ghosh, Guang Xu, Yanwei Liu, Ramakrishna Morla Jan 2024

The Influence Of Surfactants' Ionicity On The Performance Of Coal Dust Suppression, Zidong Zhao, Ping Chang, Apurna Ghosh, Guang Xu, Yanwei Liu, Ramakrishna Morla

Mining Engineering Faculty Research & Creative Works

Coal dust is a significant health hazard for coal workers, as prolonged inhalation can lead to severe diseases such as Coal Workers' Pneumoconiosis. Water spray with surfactants is commonly used as a pre-control strategy to control coal dust in underground mines. The zeta potential test is a widely used static test to evaluate surfactants with different ionicities. However, there are still some arguments about the evaluation criteria of zeta potential on surfactant performance between different researchers. Moreover, whether zeta potential can be used as an index to evaluate the surfactant suppression performance is inconclusive. To address these problems, this study …

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Numerical Investigation For The Effect Of Joint Persistence On Rock Slope Stability Using A Lattice Spring-Based Synthetic Rock Mass Model, Mariam Al-E'Bayat, Dogukan Guner, Taghi Sherizadeh, Mostafa Asadizadeh Jan 2024

Numerical Investigation For The Effect Of Joint Persistence On Rock Slope Stability Using A Lattice Spring-Based Synthetic Rock Mass Model, Mariam Al-E'Bayat, Dogukan Guner, Taghi Sherizadeh, Mostafa Asadizadeh

Mining Engineering Faculty Research & Creative Works

This study underscores the profound influence of rock joints, both persistent and non-persistent with rock bridges, on the stability and behavior of rock masses—a critical consideration for sustainable engineering and natural structures, especially in rock slope stability. Leveraging the lattice spring-based synthetic rock mass (LS-SRM) modeling approach, this research aims to understand the impact of persistent and non-persistent joint parameters on rock slope stability. The Slope Model, a Synthetic Rock Mass (SRM) approach-based code, is used to investigate the joint parameters such as dip angle, spacing, rock bridge length, and trace overlapping. The results show that the mobilizing zones in …

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Comparative Analysis Of Different Cfd Turbulence Models For A Diesel Pool Combustion Event In An Underground Mine: A Case Study, Ashish Ranjan Kumar, Oluwafemi Salami, Nana A. Amoah, Guang Xu Jan 2024

Comparative Analysis Of Different Cfd Turbulence Models For A Diesel Pool Combustion Event In An Underground Mine: A Case Study, Ashish Ranjan Kumar, Oluwafemi Salami, Nana A. Amoah, Guang Xu

Mining Engineering Faculty Research & Creative Works

Underground Mine Fires Are Dangerous, Consume Resources, and Emit Pollutants. Therefore, Acquiring In-Mine Data for Fire Research is Hazardous and Expensive Due to Unsteady Temperature Changes and Toxic Gas Emissions. Computational Fluid Dynamics (CFD) Models Are Often Developed to Mimic Airflows and Combustion-Associated Heat Transfer. However, Research on the Performance Evaluation of the CFD Turbulence Models to Mimic Fire Events is Limited. This Paper Summarises the Modelling Results for a Diesel Pool Fire Event in an Experimental Underground Mine that Uses an Exhaust Ventilation System. a Fire Dynamics Simulator (FDS) Model Was Developed to Show the Spatio-Temporal Temperature Evolution. Reynolds-Averaged …

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Stochastic Modeling Of Decarbonizing Strategy, Policy, And Market-Induced Incentives For The Us Electricity Sector, Jessica W.A. Azure, Samuel Frimpong, Mahelet G. Fikru Dec 2023

Stochastic Modeling Of Decarbonizing Strategy, Policy, And Market-Induced Incentives For The Us Electricity Sector, Jessica W.A. Azure, Samuel Frimpong, Mahelet G. Fikru

Mining Engineering Faculty Research & Creative Works

In line with the global pursuit of achieving net-zero carbon emissions, integrating carbon capture and storage (CCS) and renewable energy (RE) technologies is important in power production. This study evaluates the profitability of CCS and RE technologies as alternative ways of achieving climate change goals. While past research focused on costs, technological advancements, and capture methods, there is a need for more studies on assessing the financial feasibility of these climate change solutions under uncertain conditions, alongside specific performance goals and strategies to entice power producers. Using a comprehensive framework featuring deterministic and stochastic modeling approaches, this research explores the …

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Experimental Study Of Surfactants’ Performance For Suppressing Coal Dust With Respirable Size, Zidong Zhao, Ping Chang, Guang Xu, Apurna Ghosh, Ramakrishna Morla Nov 2023

Experimental Study Of Surfactants’ Performance For Suppressing Coal Dust With Respirable Size, Zidong Zhao, Ping Chang, Guang Xu, Apurna Ghosh, Ramakrishna Morla

Mining Engineering Faculty Research & Creative Works

Long-term exposure to coal dust can lead to severe health problems in coal workers, including Coal Workers' Pneumoconiosis, making effective control of coal dust in underground mines essential. Water spraying is a widely used method for controlling coal dust, and adding surfactants can remarkably enhance its effectiveness. While previous studies have examined the influences of different coal particle sizes on surfactant performance, they have primarily focused on inhalable dust with sizes less than 100 µm. The impact of finer particle sizes, such as respirable dust with sizes less than 10 µm, remains inconclusive. This study aims to investigate the effects …

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Demo-Abstract: A Dtn System For Tracking Miners Using Gae-Lstm And Contact Graph Routing In An Underground Mine, Abhay Goyal, Sanjay Kumar Madria, Samuel Frimpong Oct 2023

Demo-Abstract: A Dtn System For Tracking Miners Using Gae-Lstm And Contact Graph Routing In An Underground Mine, Abhay Goyal, Sanjay Kumar Madria, Samuel Frimpong

Computer Science Faculty Research & Creative Works

Localization and prediction of movement of miners in underground mines have been a constant problem more so during a mine disaster. Due to the unavailability of GPS signals, the pillars are used as a method to locate these miners, and thus, location prediction is also carried out with reference to these pillars. In this work, we demon- strate a Delay-tolerant Network (DTN) system called Miner-Finder that leverages Machine Learning (ML) framework (GAE-LSTM) that works on edge devices (e.g., mobile phones, tablets) to predict the location of miners in an underground mine. The information such as speed, angle, time, nearest pillar …

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Discrete Choice Experiment Consideration: A Framework For Mining Community Consultation With Case Studies, Sisi Que, Yu Huang, Kwame Awuah-Offei, Liang Wang, Songlin Liu Sep 2023

Discrete Choice Experiment Consideration: A Framework For Mining Community Consultation With Case Studies, Sisi Que, Yu Huang, Kwame Awuah-Offei, Liang Wang, Songlin Liu

Mining Engineering Faculty Research & Creative Works

Local community acceptance, a key indicator of the socio-political risk of a project, is addressed through good stakeholder (community) engagement. Discrete choice modeling (DCM) enhances stakeholder analysis and has been widely applied to encourage community engagement in energy projects. However, very little detail is provided on how researchers design discrete choice experiments (DCEs). DCE design is the key step for effective and efficient data collection. Without this, the discrete choice model may not be meaningful and may be misleading in the local community engagement effort. This paper presents a framework for mining community engagement DCE design in an attempt to …

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Effect Of Shock Tunnel Geometry On Shockwave And Vortex Ring Formation, Propagation, And Head On Collision, Rachel L. Bauer, Emily M. Johnson, Alexander D. Douglas, Catherine E. Johnson Aug 2023

Effect Of Shock Tunnel Geometry On Shockwave And Vortex Ring Formation, Propagation, And Head On Collision, Rachel L. Bauer, Emily M. Johnson, Alexander D. Douglas, Catherine E. Johnson

Mining Engineering Faculty Research & Creative Works

Vortex ring research primarily focuses on the formation from circular openings. Consequently, the role of tunnel geometry is less understood, despite there being numerous research studies using noncircular shock tunnels. This experimental study investigated shockwaves and vortex rings from different geometry shock tunnels from formation at the tunnel opening to head on collision with another similarly formed vortex ring using schlieren imaging and statistical analysis. The velocity of the incident shockwave was found to be consistent across all four shock tunnel geometries, which include circle, hexagon, square, and triangle of the same cross-sectional area. The velocity was 1.2 ± 0.007 …

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Numerical Modeling Of Rock Blocks With Nonpersistent Rough Joints Subjected To Uniaxial Compressive And Shear Loadings, Mostafa Asadizadeh, Mahdi Moosavi, Mohammad Farouq Hossaini, Ahmadreza Hedayat, Taghi Sherizadeh, Hossein Masoumi Jul 2023

Numerical Modeling Of Rock Blocks With Nonpersistent Rough Joints Subjected To Uniaxial Compressive And Shear Loadings, Mostafa Asadizadeh, Mahdi Moosavi, Mohammad Farouq Hossaini, Ahmadreza Hedayat, Taghi Sherizadeh, Hossein Masoumi

Mining Engineering Faculty Research & Creative Works

Characterizing the mechanical behavior of jointed rocks is important to understand the behavior of structures in rock masses. Jointed rocks can be composed of persistent and nonpersistent joints where the impact of nonpersistent joints requires careful consideration for an accurate rock mass mechanical characterization. Most previous investigations into nonpersistent jointed rocks focused on joints with smooth surfaces, and a few experimental studies focused on nonpersistent rough joints and nothing specific has been reported numerically. Therefore, this study investigated several synthetic jointed rocks with nonpersistent rough joints numerically under uniaxial compressive and shear loadings. The PFC2D-based synthetic rock mass (SRM) approach …

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Experimental And Machine Learning Studies On Chitosan-Polyacrylamide Copolymers For Selective Separation Of Metal Sulfides In The Froth Flotation Process, Keitumetse Monyake, Taihao Han, Danish Ali, Lana Z. Alagha, Aditya Kumar Jun 2023

Experimental And Machine Learning Studies On Chitosan-Polyacrylamide Copolymers For Selective Separation Of Metal Sulfides In The Froth Flotation Process, Keitumetse Monyake, Taihao Han, Danish Ali, Lana Z. Alagha, Aditya Kumar

Mining Engineering Faculty Research & Creative Works

The froth flotation process is extensively used for the selective separation of valuable base metal sulfides from uneconomic associated minerals. However, in this complex multiphase process, various parameters need to be optimized to ensure separation selectivity and peak performance. In this study, two machine learning (ML) models, artificial neural network (ANN) and random forests (RF), were used to predict the efficiency of in-house synthesized chitosan-polyacrylamide copolymers (C-PAMs) in the depression of iron sulfide minerals (i.e., pyrite) while valuable base metal sulfides (i.e., galena and chalcopyrite) were floated using nine flotation variables as inputs to the models. The prediction performance of …

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Tensile Behavior Of Layered Rock Disks Under Diametral Loading: Experimental And Numerical Investigations, Mostafa Asadizadeh, Saeed Khosravi, Soheil Abharian, Mehrdad Imani, Jamshid Shakeri, Ahmadreza Hedayat, Nima Babanouri, Taghi Sherizadeh May 2023

Tensile Behavior Of Layered Rock Disks Under Diametral Loading: Experimental And Numerical Investigations, Mostafa Asadizadeh, Saeed Khosravi, Soheil Abharian, Mehrdad Imani, Jamshid Shakeri, Ahmadreza Hedayat, Nima Babanouri, Taghi Sherizadeh

Mining Engineering Faculty Research & Creative Works

The Tensile Strength and Cracking Behavior of Layered Rocks in a Tensile Stress Field Are One of the Most Significant Characteristics of Rock Masses, Which May Strongly Affect the Stability of Rock Structures. the Study Presented Here Investigated the Effect of Layer Spacing and Inclination Angle on the Indirect Tensile Strength, Crack Development, Failure Pattern, and Contact Force Chain of Layered Disks under Diametral Loading using Experimental and Numerical Investigations. Numerous Experimental Models Made from Plaster Were Examined under Diametral Loading, and a Two-Dimensional Particle Flow Code (PFC2D) Was Adopted for in Depth Simulation of the Failure Process. Both Numerical …

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Review Of Current Coal Rib Control Practices, Dogukan Guner, Samuel Nowak, Taghi Sherizadeh, Maurice Sunkpal, Khaled Mohamed, Yuting Xue Apr 2023

Review Of Current Coal Rib Control Practices, Dogukan Guner, Samuel Nowak, Taghi Sherizadeh, Maurice Sunkpal, Khaled Mohamed, Yuting Xue

Mining Engineering Faculty Research & Creative Works

The instability of coal ribs in underground mines continues to result in the injuries and fatalities of mine workers. The proper estimation and evaluation of primary and secondary support for coal ribs is still a challenging problem in the field of ground control science and requires further research and study. Although mining operations have various support design criteria and support methodologies for strata control, most rib support designs are still based on experience and local practices. This review study is intended to summarize the currently applied practices for rib support and control in various countries and mining conditions. Firstly, critical …

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Review Of Current Coal Rib Control Practices, Dogukan Guner, Samuel Nowak, Taghi Sherizadeh, Maurice Sunkpal, Khaled Mohamed, Yuting Xue Apr 2023

Review Of Current Coal Rib Control Practices, Dogukan Guner, Samuel Nowak, Taghi Sherizadeh, Maurice Sunkpal, Khaled Mohamed, Yuting Xue

Mining Engineering Faculty Research & Creative Works

The instability of coal ribs in underground mines continues to result in the injuries and fatalities of mine workers. The proper estimation and evaluation of primary and secondary support for coal ribs is still a challenging problem in the field of ground control science and requires further research and study. Although mining operations have various support design criteria and support methodologies for strata control, most rib support designs are still based on experience and local practices. This review study is intended to summarize the currently applied practices for rib support and control in various countries and mining conditions. Firstly, critical …

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Review Of Current Coal Rib Control Practices, Dogukan Guner, Samuel Nowak, Taghi Sherizadeh, Maurice Sunkpal, Khaled Mohamed, Yuting Xue Apr 2023

Review Of Current Coal Rib Control Practices, Dogukan Guner, Samuel Nowak, Taghi Sherizadeh, Maurice Sunkpal, Khaled Mohamed, Yuting Xue

Mining Engineering Faculty Research & Creative Works

The instability of coal ribs in underground mines continues to result in the injuries and fatalities of mine workers. The proper estimation and evaluation of primary and secondary support for coal ribs is still a challenging problem in the field of ground control science and requires further research and study. Although mining operations have various support design criteria and support methodologies for strata control, most rib support designs are still based on experience and local practices. This review study is intended to summarize the currently applied practices for rib support and control in various countries and mining conditions. Firstly, critical …

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Evaluating The Effect Of Overburden Depth, Mining Height, And Support Density On Coal Rib Damage Using Dem Modeling, Maurice Sunkpal, Taghi Sherizadeh, Dogukan Guner Mar 2023

Evaluating The Effect Of Overburden Depth, Mining Height, And Support Density On Coal Rib Damage Using Dem Modeling, Maurice Sunkpal, Taghi Sherizadeh, Dogukan Guner

Mining Engineering Faculty Research & Creative Works

There Has Been a Global Effort in the Past Decade, Especially in Major Coal-Producing Countries, toward Understanding the Mechanics Involved in the Stability of Coal Mine Ribs. Buckling and Spalling of Mine Ribs Are Known to Have an Impact on their Stability and Degradation. the Generation, Propagation, and Coalescence of Cracks in Mine Pillar Ribs Are Significantly Affected by the overburden Depths. in Addition, the in Situ Stress Magnitudes Tend to Affect the Rib Damage Process. High Horizontal Stresses and Increased Depths Can Lead to Unfavorable Stress Conditions, Inducing Coal Mass Damage and Strength Loss. Understanding the Dynamics Involved in …

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Are Natural Fractures In Sandstone Reservoir: Water Wet – Mixed Wet – Or Oil Wet?, Salah Almudhhi, Laila Abdullah, Waleed Al-Bazzaz, Saleh Alsayegh, Hussien Alajaj, Ralph E. Flori Mar 2023

Are Natural Fractures In Sandstone Reservoir: Water Wet – Mixed Wet – Or Oil Wet?, Salah Almudhhi, Laila Abdullah, Waleed Al-Bazzaz, Saleh Alsayegh, Hussien Alajaj, Ralph E. Flori

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

This study accurately measures the wettability contact angle of native Kuwaiti sandstone reservoir that hosts mixed pore size distributions in both the tight sandstone matrix as well as the natural fracture (NF) embedded in it. Also, this study, effectively, investigates the geometrical size and shape of natural available voids whether matrix voids or NF voids captured in the rock 2D image frame system. Correspondingly, this study is, successfully, measure tight matrix, NF Pore wall, and NF pore opening wettability performance and recovery efficiency contributions inside the sandstone reservoir. A model pore/ grain contact angle wettability is generated. Therefore, this study …

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Studies On The Enrichment Feasibility Of Rare Earth-Bearing Minerals In Mine Tailings, Jose L. Corchado-Albelo, Lana Z. Alagha Mar 2023

Studies On The Enrichment Feasibility Of Rare Earth-Bearing Minerals In Mine Tailings, Jose L. Corchado-Albelo, Lana Z. Alagha

Mining Engineering Faculty Research & Creative Works

This Study Aimed to Investigate the Potential of Enrichment of Rare-Earth-Bearing Minerals in Historic Mine Tailing using the Froth Flotation Process. Characterization Studies Indicated that Tailings Contained 11,000 Ppm of Rare Earth Elements (REEs). the Major Mineral in the Tailings Was Apatite at ~84%, Which Was Associated with Iron Oxides (~16%). TESCAN's Integrated Mineral Analysis (TIMA) Showed that Monazite Was the Main REE Mineral, and 69% of Monazite Was Locked in Apatite Grains. Characterization Studies Suggested that the Separation of REEs-Bearing Apatite from Iron Oxides is Possible using Froth Flotation, Wherein Apatite Was Floated and Iron Oxides Were Depressed. Zeta …

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Water-Cased Kicker Charges For Use In Explosive Demolition, Rachel L. Bauer, Paul Pitzel, Emily M. Johnson, Catherine E. Johnson Feb 2023

Water-Cased Kicker Charges For Use In Explosive Demolition, Rachel L. Bauer, Paul Pitzel, Emily M. Johnson, Catherine E. Johnson

Mining Engineering Faculty Research & Creative Works

Demolition Projects Involving Explosives Often Incorporate Cutting Charges to Sever Columns in Conjunction with Kicker Charges that "Move" the Columns Out of Alignment. Traditional Kicker Charges Use Dynamite Secured to the Column above a Linear-Shaped Cutting Charge. This Study Investigates the Use of Water-Cased Kicker Charges for Use in Explosive Demolition. the Goal is to Reduce the Fragmentation of Steel Members and the Quantity of Explosive Needed Due to the Increased Density, Incompressibility, and Impedance Mismatch Water Provides. Simulations and Experimental Tests Were Utilized to Determine What Type of Charges Provide the Optimal Column Movement and Water Placement. Water Charges …

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Laboratory-Scale Investigation On Shear Behavior Of Non-Persistent Joints And Joint Infill Using Lattice-Spring-Based Synthetic Rock Mass Model, Mariam Al-E'Bayat, Taghi Sherizadeh, Dogukan Guner Feb 2023

Laboratory-Scale Investigation On Shear Behavior Of Non-Persistent Joints And Joint Infill Using Lattice-Spring-Based Synthetic Rock Mass Model, Mariam Al-E'Bayat, Taghi Sherizadeh, Dogukan Guner

Mining Engineering Faculty Research & Creative Works

Discontinuities Mainly Control the Mechanical Behavior of Rock Mass and Cause a Significant Reduction in the Rock Mass Strength. Joint Persistency and Joint Infill Conditions Are Considered the Most Significant Joint Parameters that Control the Mechanical Response of Rock Mass. in This Study, Numerical and Statistical Analyses Were Performed on Pre-Cracked Specimens with Two Flaws to Investigate the Effect of Joint Persistence Parameters on Shear Strength. in Addition, an Extensive Study Was Conducted to Explore the Effect of Infilled Mineral Strength, Infill Thickness, and Infill Wall Roughness on Shear Strength. the Lattice-Spring-Based Synthetic Rock Mass (LS-SRM) Approach Was Utilized to …

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Adoption Of Astm A956-06 Leeb Hardness Testing Standard To Rock Engineering Applications, Sasan Ghorbani, Seyed Hadi Hoseinie, Ebrahim Ghasemi, Taghi Sherizadeh Jan 2023

Adoption Of Astm A956-06 Leeb Hardness Testing Standard To Rock Engineering Applications, Sasan Ghorbani, Seyed Hadi Hoseinie, Ebrahim Ghasemi, Taghi Sherizadeh

Mining Engineering Faculty Research & Creative Works

The Leeb dynamic hardness test was originally developed for metallic materials and is now widely used in rock engineering and engineering geology. This study aims to fundamentally investigate the application conditions of the Leeb hardness test in rock engineering because it is a high-precision, fast, nondestructive, and portable method. Therefore, four main limitations of the Leeb method mentioned in ASTM A956-06 have been further analyzed. The important challenges, including scale effect, temperature effect, surface roughness effect, and the effect of physical properties on the Leeb method, have been studied. For this purpose, 33 rock samples with a wide range of …

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A Dtn-Based Spatio-Temporal Routing Using Location Prediction Model In Underground Mines, Abhay Goyal, Sanjay Kumar Madria, Samuel Frimpong Jan 2023

A Dtn-Based Spatio-Temporal Routing Using Location Prediction Model In Underground Mines, Abhay Goyal, Sanjay Kumar Madria, Samuel Frimpong

Computer Science Faculty Research & Creative Works

Situational awareness during any disaster depends on effective communication and location tracking. In the case of underground mines, where the communication methods are mostly central, the whole communication channel would be rendered unusable during a disaster. To this end, we propose the use of Delay Tolerant Networks (DTN) to allow the miners to function in a distributed manner and help in locating the injured miners and routing distress messages. Due to the unavailability of GPS signals, the pillar numbers are used to identify the locations of the miners. For spatio-temporal routing of messages, we formulate a new scheme using Contact …

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Explosion Resistance Of Reinforced Concrete Refuge Alternative Wall Under Certain Abutment Loading, K. E. Karadeniz, D. Guner, Taghi Sherizadeh Jan 2023

Explosion Resistance Of Reinforced Concrete Refuge Alternative Wall Under Certain Abutment Loading, K. E. Karadeniz, D. Guner, Taghi Sherizadeh

Mining Engineering Faculty Research & Creative Works

Build-in-place (BIP) refuge alternatives (RAs) are used to provide safe havens for miners unable to escape their working area after an accident like an explosion. These underground infrastructures are built over time in various locations and might expose to mining-induced stresses. The convergences related to these stress redistributions around the mine openings might change their structural integrity and, subsequently, the explosion resistivity. Studying the effect of increasing vertical load like abutment stress on such underground mine stopping for the explosion resistance is difficult because repetitive explosion experiments on these structures are perilous and challenging. This study uses two case studies …

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Molecular Mechanism Study On The Effect Of Nonionic Surfactants With Different Degrees Of Ethoxylation On The Wettability Of Anthracite, Xuanlai Chen, Guochao Yan, You Zhou, Guang Xu, Xuyang Bai, Jiajun Li Jan 2023

Molecular Mechanism Study On The Effect Of Nonionic Surfactants With Different Degrees Of Ethoxylation On The Wettability Of Anthracite, Xuanlai Chen, Guochao Yan, You Zhou, Guang Xu, Xuyang Bai, Jiajun Li

Mining Engineering Faculty Research & Creative Works

A serious risk to the production safety of coal mines is coal dust. The wettability of coal may be successfully changed by adding surfactants to water. However, the creation of very effective dust suppressants is constrained by the lack of knowledge about the microscopic interaction mechanism between coal dust and surfactants. In this investigation, we explained macroscopic experimental phenomena from a molecular perspective. The lauryl polyoxyethylene ethers (C12 (EO)n, n = 7,15,23) were selected. The macromolecular model of anthracite with 55 different components was constructed. Surface tension experiments and hydrophilic lipophilic balance (HLB) calculations showed that the ability of surface …

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Evaluating Blast Wave Overpressure From Non-Spherical Charges Using Time Of Arrival From High-Speed Video, Kelly Williams, Catherine E. Johnson Jan 2023

Evaluating Blast Wave Overpressure From Non-Spherical Charges Using Time Of Arrival From High-Speed Video, Kelly Williams, Catherine E. Johnson

Mining Engineering Faculty Research & Creative Works

Scaled distance is used to predict blast wave overpressure surrounding the detonation of a known mass of explosive under the assumption that the charge geometry is spherical. Altering charge geometry from spherical overdrives regions of the blast wave resulting in areas of higher overpressures than predicted by scaled distance calculations. Empirical data can be used to scale the blast wave overpressure to cylindrical charges, but available overpressure data for more complex geometries is not available in published literature. In the present study the time of arrival of the blast wave was measured from high-speed video and the Rankine-Hugoniot relationship used …

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Analyzing The Effectiveness Of The Gurney Method For Small Scale Fragmentation Propulsion Using Exploding Bridgewire Detonators, Emily M. Johnson, Rachel L. Bauer, Catherine E. Johnson Jan 2023

Analyzing The Effectiveness Of The Gurney Method For Small Scale Fragmentation Propulsion Using Exploding Bridgewire Detonators, Emily M. Johnson, Rachel L. Bauer, Catherine E. Johnson

Mining Engineering Faculty Research & Creative Works

Explosives are common in military, mining, and construction applications where the explosive properties are understood, but mechanics of how the explosive's energy fragments and throws materials are less known. Considering the type of confining material around an explosive, creates variability in fragmentation behavior due to the individual material characteristics. The most common method for assessing fragmentation behavior is the Gurney method, which eliminates any consideration of fragmenting material properties. The Gurney method assumes that, on a large scale, the inconsistencies in material are irrelevant and only the mass of the confiner need be considered. However, it is known in many …

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Molecular Mechanism Study On The Effect Of Nonionic Surfactants With Different Degrees Of Ethoxylation On The Wettability Of Anthracite, Xuanlai Chen, Guochao Yan, You Zhou, Guang Xu, Xuyang Bai, Jiajun Li Jan 2023

Molecular Mechanism Study On The Effect Of Nonionic Surfactants With Different Degrees Of Ethoxylation On The Wettability Of Anthracite, Xuanlai Chen, Guochao Yan, You Zhou, Guang Xu, Xuyang Bai, Jiajun Li

Mining Engineering Faculty Research & Creative Works

A serious risk to the production safety of coal mines is coal dust. The wettability of coal may be successfully changed by adding surfactants to water. However, the creation of very effective dust suppressants is constrained by the lack of knowledge about the microscopic interaction mechanism between coal dust and surfactants. In this investigation, we explained macroscopic experimental phenomena from a molecular perspective. The lauryl polyoxyethylene ethers (C12 (EO)n, n = 7,15,23) were selected. The macromolecular model of anthracite with 55 different components was constructed. Surface tension experiments and hydrophilic lipophilic balance (HLB) calculations showed that the …

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