Scholarly Works, Mining and Minerals Engineering
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Research articles, presentations, and other scholarship
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Molecular Dynamics Simulation of Forsterite and Magnesite Mechanical Properties: Does Mineral Carbonation Reduce Comminution Energy?
(MDPI, 2023-08-09)This work compares the mechanical properties of two geomaterials: forsterite and magnesite. Various physical conditions are considered to investigate the evolution of stress–strain relationships for these two ... -
Data Analyses of Quarry Operations and Maintenance Schedules: A Production Optimization Study
(MDPI, 2023-06-15)In this research, data analytics and machine learning were used to identify the performance metrics of loaders and haul trucks during mining operations. We used real-time collected data from loaders and haul trucks operating ... -
Research on failure mechanism and support technology of fractured rock mass in an undersea gold mine
(Taylor & Francis, 2023)The surrounding rock control has been a difficult problem for fractured rock mass in hard rock mines. This article describes a case study of the failure mechanisms and the support design technology for fractured rock mass ... -
Pathology and Mineralogy Demonstrate Respirable Crystalline Silica Is a Major Cause of Severe Pneumoconiosis in US Coal Miners
(American Thoracic Society, 2022-09)Rationale: The reasons for resurgent coal workers' pneumoconiosis and its most severe forms, rapidly progressive pneumoconiosis and progressive massive fibrosis (PMF), in the United States are not yet fully understood. ... -
A Study of Respirable Silica in Underground Coal Mines: Particle Characteristics
(MDPI, 2022-12-01)Respirable crystalline silica is now considered to be a major culprit of resurgent lung disease among US coal miners—especially in central Appalachia—though questions remain regarding the specific circumstances ... -
Recovery of Rare Earth Element from Acid Mine Drainage Using Organo-Phosphorus Extractants and Ionic Liquids
(MDPI, 2022-10-22)Acid mine drainage is a legacy environmental issue and one of the largest pollutants in many mining districts throughout the world. In prior work, the authors have developed a process for the recovery of critical materials, ... -
Stochastic Continuous Modeling for Pillar Stress Estimation and Comparison with 2D Numerical, and Analytical Solutions in an Underground Stone Mine
(Springer, 2022-09)Pillar collapses are events that due to their severe consequences can be classified as high risk. The design of pillars in underground room-and-pillar operations should migrate to risk-based design approaches. The authors ... -
Editorial: The Separation and Removal of Inorganic Ions and Organics From Aqueous Solutions
(Frontiers, 2021-11-01) -
A Fog-and-Tube Scrubber for the Removal of Diesel Particulate Matter from Engine Exhaust
(Taiwan Association of Aerosol Research, 2021-12)Diesel particulate matter (DPM), the solid portion of diesel exhaust, has been linked to a range of deleterious health impacts. While a number of control strategies have been effective at reducing DPM in some environments, ... -
Underground Rock Mass Behavior Prior to the Occurrence of Mining Induced Seismic Events
(MDPI, 2022-09-05)The variations of seismic velocity prior to the occurrence of major seismic events are an indicator of the rock mass performance subjected to mining-induced stress. There have been no prior field-scale studies to examine ... -
A Study of Respirable Silica in Underground Coal Mines: Sources
(MDPI, 2022-08-31)An ongoing resurgence of occupational lung disease among coal miners in the United States has been linked to respirable crystalline silica (RCS). To better protect miners, a deeper understanding of key exposure factors is ... -
Comparison of respirable coal mine dust constituents estimated using FTIR, TGA, and SEM-EDX
(Springer, 2022-02-24)Since the mid-1990s, there has been a resurgence of severe lung disease among US coal miners. This has prompted efforts to better characterize and monitor respirable dust exposures—especially with respect to mineral ... -
On the occurrence and persistence of coal-mineral microagglomerates in respirable coal mine dust
(Springer, 2022-02-10)A previous effort to characterize respirable coal mine dust in 16 US mines turned up a curious finding: particle-based analysis using scanning electron microscopy (SEM) tended to overpredict the abundance of dust sourced ... -
An innovative methodology for the assessment and maintenance of e-learning courses using the Community of Inquiry model
(Taylor and Francis, 2021-06-14)As part of the creation of the series of online, asynchronous learning courses developed for the community of underground ventilation practitioners (Aeolus Modules), the authors have developed an innovative plan for the ... -
Particle size and mineralogy distributions in respirable dust samples from 25 US underground coal mines
(Elsevier, 2021-11-01)Detailed characterization of respirable coal mine dust is critical to understanding occupational health outcomes, as well as improving exposure monitoring and dust controls in mines. However, data on characteristics such ... -
A Hybrid Experimental and Theoretical Approach to Optimize Recovery of Rare Earth Elements from Acid Mine Drainage Precipitates by Oxalic Acid Precipitation
(MDPI, 2022-02-12)The development of processing techniques for the extraction of rare earth elements and critical minerals (REE/CM) from acid mine drainage precipitates (AMDp) has attracted increased interest in recent years. Processes under ... -
Notes on the Potential for the Concentration of Rare Earth Elements and Yttrium in Coal Combustion Fly Ash
(MDPI, 2015-06-23)Certain Central Appalachian coals, most notably the Fire Clay coal with a REY-enriched volcanic ash fall tonstein, are known to be enriched in rare earth elements. The Fire Clay tonstein has a greater contribution to the ... -
The Effect of Conditioning on the Flotation of Pyrrhotite in the Presence of Chlorite
(MDPI, 2017-07-20)The influence of conditioning on the flotation of pyrrhotite in the presence of chlorite was investigated through flotation tests, sedimentation tests, and X-ray photoelectron spectroscopy (XPS) analysis. The flotation ... -
Flotation separation of scheelite from calcite using mixed collectors
(Elsevier, 2017-12)Flotation separation of scheelite from calcite is difficult due to the similarities in their surface properties. In this work, the flotation behavior of scheelite and calcite using oxidized paraffin soap(OPS), benzohydroxamic ... -
Acid Leaching of Rare Earth Elements from Coal and Coal Ash: Implications for Using Fluidized Bed Combustion To Assist in the Recovery of Critical Materials
(American Chemical Society, 2019-07-18)High temperature pretreatment of coal-based mineral matter in an oxidizing environment significantly enhances the leaching characteristics of rare earth elements (REEs). A research study has found that the temperatures ...
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