Application Of Synthetic Aperture Radar Interferometry To Monitor Surface Deformations Of The Trans-European Transport Network (Ten-T) – A Case Study Of The Motorways Crossing Areas Of Mining Operations In The Upper Silesian Coal Basin, Poland,
2021
Central Mining Institute, Poland
Application Of Synthetic Aperture Radar Interferometry To Monitor Surface Deformations Of The Trans-European Transport Network (Ten-T) – A Case Study Of The Motorways Crossing Areas Of Mining Operations In The Upper Silesian Coal Basin, Poland, Adam Smoliński, Mariusz Stawinoga, Tomasz Pindel
Journal of Sustainable Mining
Underground hard coal mining causes surface deformations. When the mining operations are conducted beneath linear objects, such as motorways, there is a risk of deformations of the axis of the road and its horizontal and vertical alignment (additional bends and vertical curvatures, longitudinal inclinations, deformations of crosssections). In the areas subjected to mining operations, mining plants conduct geodetic monitoring. Due to their labour intensity and costs, geodetic measurements are usually made only a few times a year. The article discusses the possibility of applying Interferometric Synthetic Aperture Radar (InSAR) to monitor the subsidence of the vertical alignment of motorways caused …
Environmental, Health And Safety Intricacies Of Artisanal Mining In The Gold-Rich Landscapes Of Karamoja, North-Eastern Uganda,
2021
Makerere University
Environmental, Health And Safety Intricacies Of Artisanal Mining In The Gold-Rich Landscapes Of Karamoja, North-Eastern Uganda, Eria Serwajja, Paul Isolo Mukwaya
Journal of Sustainable Mining
Artisanal small-scale gold mining presents opportunities for Uganda’s rural poor. However, it also poses serious environmental, health and safety challenges. A suite of data collection methods including interviews, focus groups discussions, water and soils sampling were used to examine the perceptions of miners on the status, prevalence and extent of mercury use in artisanal gold mining, mercury transit routes and toxicity levels of soils and water in Karamoja sub-region. It also explores the health, safety and environmental implications of artisanal small-scale gold mining in the sub-region. The findings show that trade and access to mercury is widespread; although trade in, …
Is The Relationship Between Mining And Climate Change Only One-Way? Climate Change Potential Impacts On Mining Activity – Hazards, Risks And Adaptation Measures,
2021
Central Mining Institute, Poland
Is The Relationship Between Mining And Climate Change Only One-Way? Climate Change Potential Impacts On Mining Activity – Hazards, Risks And Adaptation Measures, Małgorzata Markowska
Journal of Sustainable Mining
No abstract provided.
The Level Of Securing Dust Deposits Against The Possibility Of Coal Dust Explosion In The Drilled Dog Headings,
2021
Experimental Mine “Barbara”, Central Mining Institute
The Level Of Securing Dust Deposits Against The Possibility Of Coal Dust Explosion In The Drilled Dog Headings, Bogdan Malich, Krzysztof Cybulski, Malgorzata Wysocka, Krystian Skubacz, Aneta Michałek, Paweł Urban
Journal of Sustainable Mining
The article presents the analysis how the actual coal dust explosion hazard is at the distance of the initial 200 metres of the safety zone maintained along the entire length of driven inclined drift II – face 567 in BRZESZCZE colliery, which was used during realization of the project titled Modelling of the mechanism of explosive coal dust deposition in the vicinity of mined faces in terms of identification, assessment and levelling the possibility of its explosion financed by the National Centre for Research and Development. The mine dust level was between 0.014 kg/m3 and 0.193 kg/m3, …
The Impact Of Precipitation On State Of The Slopes Surface And Thermal Activity Of The Mine Waste Dump – Preliminary Study,
2021
Silesian Technical University, Gliwice
The Impact Of Precipitation On State Of The Slopes Surface And Thermal Activity Of The Mine Waste Dump – Preliminary Study, Zenon Różański, Paweł Wrona, Grzegorz Pach, Adam Niewiadomski, Tomasz Suponik, Robert Frączek, Leszek Balcarczyk
Journal of Sustainable Mining
Precipitation, especially with a high intensity, affects the condition of mining waste dumps. The article presents the results of research aimed at determining the impact of rain on water erosion on the slopes of a coal waste dump and its thermal state. Preliminary tests of the condition of two slopes of the coal waste dump in Libiąż (Poland) undertaken in the frameworks of the TEXMIN project was carried out using modern geodesy techniques (low-ceiling photogrammetry and TLS terrestrial laser scanning). The current geometry of the slope surface was faithfully reproduced in the form of a cloud of points with known …
Acknowledge Of Reviewers,
2021
Central Mining Institute
Investigation Of Anomalous Data Trends During Coal Dust Explosibilty Testing,
2021
Missouri University of Science and Technology
Investigation Of Anomalous Data Trends During Coal Dust Explosibilty Testing, Jacob Lee Miller
Doctoral Dissertations
Coal dust explosibility is a health and safety concern that has been a recognized hazard for over 100 years. Initial testing by the Author using a Siwek 20L apparatus recorded a secondary maximum pressure at higher dust concentrations (1,000-7,000g/m3) with Pulverized Pittsburgh Coal (PCC). Higher dust concentrations are beyond the typical ASTM E1226 testing procedure but are possible in mining and processing scenarios. No reference documents have been discovered that show a secondary maximum pressure at higher dust concentrations. Literature reviewed identified that once a coal dust concertation generates a peak pressure, the pressure remains constant or decreases …
The Effects Of Rigid Polyurethane Foam As A Confinement Material On Breaching Charge Detonations,
2021
Missouri University of Science and Technology
The Effects Of Rigid Polyurethane Foam As A Confinement Material On Breaching Charge Detonations, Nathan Franz Paerschke-O'Brien
Masters Theses
"The effects of a rigid polyurethane foam used as a confinement material on four types of breaching explosives were tested, focusing on the changes in shockwave peak pressures, detonation load compression forces, and brisance cratering abilities. The Plate Dent testing procedure was modified to incorporate a load cell force sensor, and two air overpressure sensors were included adjacent to the blast to quantify each test result. The testing variables focused on the polyurethane foam cure times and thickness volumes around the breaching explosives to determine the breaching charges' optimal energy output capabilities when confined by the foam material. The rigid …
Relating Detonation Parameters To The Detonation Synthesis Of Nanomaterials,
2021
Missouri University of Science and Technology
Relating Detonation Parameters To The Detonation Synthesis Of Nanomaterials, Martin Langenderfer
Doctoral Dissertations
“This research investigates the physical and chemical processes that contribute to the detonation synthesis of silicon carbide nanoparticles. Bulk production of SiC nanoparticles through detonation is possible due to pressures achieved over 20 GPa and temperatures over 2000 K as well as quenching rates in excess of 13 billion K/second. These conditions catalyze reaction and bottom-up molecular growth while retaining particles < 100 nm in diameter. In this work, detonation synthesis of SiC was demonstrated by incorporation of polycarbosilane, an SiC precursor material, into an RDX/TNT explosive matrix prior to detonation. Detonation Synthesis of SiC was also accomplished by reacting elemental silicon with carbon liberated by the detonation of negatively oxygen balanced TNT. Hydrodynamic simulation of a 60:40 mass ratio RDX/TNT detonation created conditions thermodynamically suitable to produce cubic silicon carbide within the first 500 nanoseconds after the passage of the detonation wave while carbon remains chemically reactive for molecular formation. Simulations and experimental tests indicated that loading configuration and impedance mismatch of the precursor additives used in detonation synthesis results in conditions in the additives that exceed the accepted detonation pressure of the explosive by greater than three times. Finally, a full factorial experimental design showed increasing silicon concentration, reducing silicon size, and reducing oxygen balance by adjusting the ratio of RDX to TNT decreased the explosives detonation pressure by 20% and increased the soot yield and concentration of SiC observed in the detonation products by 82% and 442% respectively”--Abstract, page iv.
Investigating The Focusing Effect Of Charge Geometry With Computer Simulations, Witness Plates, And High-Speed Videography,
2021
Missouri University of Science and Technology
Investigating The Focusing Effect Of Charge Geometry With Computer Simulations, Witness Plates, And High-Speed Videography, Kelly Ray Williams
Doctoral Dissertations
"Scaled distance is used to calculate a safe standoff radius from the detonation of a known mass of an explosive. It has been shown that varying only the geometry of the charge significantly overdrives regions of the blast wave potentially resulting in hazardous overpressure levels at scaled distance safe radii. Pressure transducers are used to measure overpressure surrounding spherical, cylindrical, and cubic charges to determine if bridge waves were formed at the edges between flat sides as seen in published studies of cylindrical charges. In the fireball field a witness plate is used to evaluate radial energy distribution with a …
Projectile Generator Design For Underground Coal Mine Seal Testing,
2021
Missouri University of Science and Technology
Projectile Generator Design For Underground Coal Mine Seal Testing, Ethan Allan Steward
Masters Theses
"Underground coal mines have several dangers, one of the most hazardous of which is the possibility of an explosion caused by the ignition of methane gas. To reduce ventilation costs, coal mines have the option to close off abandoned areas that are no longer active with structural seals to keep an explosion from propagating into working areas of the mine. Though seals have been designed to resist the overpressure, none have been evaluated for their resistance to the impact of heavy objects. Underground explosions produce high velocity gasses that, traveling through mine openings, may propel objects in the mine at …
Evaluation Of The Extractive Gold Process: Open-Pit Mining Through Exergy Analysis,
2020
Universidad Nacional de Colombia Sede Medellín, Medellín 050041, Colombia
Evaluation Of The Extractive Gold Process: Open-Pit Mining Through Exergy Analysis, Hector I. Velasquez, Carlos Andres Orozco Loaiza, Christian Hasenstab, Natalia A. Cano
Journal of Sustainable Mining
The Colombian mining sector is characterized by the production of coal, nickel, emeralds, gold, and construction materials. It is considered by the National Development Plan of Colombia 2018-2022 as an economic agent that boosts development in the region and one that requires the strengthening of its policies and environmental liability. Therefore, this paper aims to show the importance of implementing methodologies based on the logic of nature (exergy) that objectively indicate the environmental impact of an extractive gold activity, such as open-pit gold mining. The extractive activity or process to be studied consists of the following stages: topsoil removal by …
Exergy Life Cycle Assessment Indicators In Colombian Gold Mining Sector,
2020
Universidad Nacional de Colombia Sede Medellín, Medellín, 050041, Colombia
Exergy Life Cycle Assessment Indicators In Colombian Gold Mining Sector, Natalia A. Cano, Christian Hasenstab, Hector I. Velasquez
Journal of Sustainable Mining
Thermodynamic methods, such as exergy analysis allow the assessment of environmental load (environmental impacts), by calculating the entropy generated or exergy destroyed due to the use of renewable and non-renewable resources along the entire production chain. In this research, exergy analysis will be approached as an extension of LCA to ExLCA (Exergy Life Cycle Assessment), as complementary tools, for sustainability assessment of two gold mining systems in Colombia: open-pit and alluvial mining. It is quantified exergy life cycle efficiencies; Cumulative Energy/ Exergy Demand, by distinguishing between renewable and non-renewable resources used in the process. The energy contained in renewable and …
True Cost Of Coal: Coal Mining Industry And Its Associated Environmental Impacts On Water Resource Development,
2020
Environmental Geochemistry Laboratory, Department of Environmental Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, PO 45320, Pakistan
True Cost Of Coal: Coal Mining Industry And Its Associated Environmental Impacts On Water Resource Development, Noshin Masood, Karen Hudson-Edwards, Abida Farooqi
Journal of Sustainable Mining
Coal is a strategic and essential resource that ensures quality of life, energy security and sustainable development. Being the cheapest source of energy, it is the second after oil that is used to generate 40% of the world's electricity. However, traditional and conventional coal fuel extraction can threaten human health bycontaminating air and water, harming land, and contributing to global warming. The environmental impacts associated with conventional methods of coal mining and consumption can affect all components of the environment, and these impacts may be beneficial or harmful, permanent or temporary, repairable or irreparable, and reversible or irreversible in nature. …
Measurement Of Surface Subsidence And Ground Collapse Caused By Underground Mining In The Boleo Copper District, Mexico,
2020
Department of Energy and Resources Engineering, Chonnam Nationa University, Korea
Measurement Of Surface Subsidence And Ground Collapse Caused By Underground Mining In The Boleo Copper District, Mexico, Jong-Gwan Kim
Journal of Sustainable Mining
Subsidence and vertical movements in mines are a challenge in mining operations. To qualify as a controlled mine site, ground movements must be measured regularly during mining operations. Boleo Copper District mine was monitored and the movement during mining operations was measured from Oct. 31, 2018 to March 15, 2019. The evaluation of vertical and horizontal movement was determined in four locations in the mine areas M303, M303S, M303 C, and M305. The exploitation area, which measured approximately 80 x 90 m2 with a height of 2.4 m, impacted the surface in the form of cracks. These cracks were …
Recovery And Repurposing Of Thermal Resources In The Mining And Mineral Processing Industry,
2020
School of Engineering, Laurentian University, 935 Ramsey Lake Road, Sudbury, ON, Canada
Recovery And Repurposing Of Thermal Resources In The Mining And Mineral Processing Industry, Shannon H. Mclean, Jeffrey Chenier, Sari Muinonen, Corey A. Laamanen, John A. Scott
Journal of Sustainable Mining
The consumption of energy contributes significantly to the overall cost of operations and the environmental impact of the mining and mineral processing industry. However, despite a few notable exceptions, most of the resulting waste heat produced is dissipated, without recovery, into the environment. There is also a lot of stored heat in mine water which can be tapped into long after a mine has closed. There is, therefore, significant opportunity to improve the industry's sustainability through increasing the amount of waste heat recovered and repurposed.
Mineralogical Variations With The Mining Depth In The Congo Copperbelt: Technical And Environmental Challenges In The Hydrometallurgical Processing Of Copper And Cobalt Ores,
2020
Inorganic Chemistry Unit, Department of Chemistry, Faculty of the Sciences, University of Lubumbashi, Likasi Avenue, PO BOX 1825, City of Lubumbashi, Haut-Katanga Province, Democratic Republic of Congo
Mineralogical Variations With The Mining Depth In The Congo Copperbelt: Technical And Environmental Challenges In The Hydrometallurgical Processing Of Copper And Cobalt Ores, Michel Shengo Lutandula, W. S. Kitobo, M. B. Kime, M. P. Mambwe, T. K. Nyembo
Journal of Sustainable Mining
For a long time in the Democratic Republic of Congo, the mining of ores for the production of copper cathodes and salts of cobalt was mostly conducted in the near-surface oxidized mineralization of the Congo Copperbelt. An important part of this mineralization is found in geological settings where copper and cobalt mainly exist as mixtures of oxides and sulfides. With the depletion of surface-rich minerals, mining is taking place at depths where sulfide minerals are prevalent. Using current technologies, the hydrometallurgical processing of ores with high levels of sulfide minerals results in poor metal recovery due to their retention in …
Alternative Methodology To Determine Effective Coefficient Of Methane Diffusion In Coal,
2020
Experimental Mine 'Barbara', Department of Gas Hazard Control, The Central Mining Institute (Katowice, Poland) ul. Podleska 72, 43- 190, Mikołów, Poland
Alternative Methodology To Determine Effective Coefficient Of Methane Diffusion In Coal, Henryk Koptoń
Journal of Sustainable Mining
The article presents the results of research in to the development of an alternative method of determining the effective coefficient of methane diffusion in coal, based on a mathematical model following Fick's second law. The research was conducted based on the recorded courses of methane sorption kinetics in coal samples obtained in laboratory conditions with the precise gravimetric sorption system IGA-001. The value of the coefficient was treated as an element tuning the model in such a way that the average relative error of the ex post was as small as possible. Model verification indicated the correctness of its assumptions. …
In Search Of A Future For Mining: Participative Scenarios For Colombia,
2020
Universidad Nacional de Colombia, Sede Medellín, Faculty of Mines, Decision Sciences Group, Carrera 80 No 65-223 Bloque M8a, 050041, Medellín, Colombia
In Search Of A Future For Mining: Participative Scenarios For Colombia, Santiago Arango-Aramburo, Ricardo Smith, Patricia Jaramillo, Yris Olaya, Adrian Saldarriaga, Oscar J. Restrepo, Yuly Arboleda, Carla Rua, Sebastian Bernal, Pablo E. Londono, Erik R. Larsen
Journal of Sustainable Mining
We describe and discuss the development of scenarios for the Colombian mining industry. The scenarios were developed with a large group of stakeholders from across the Colombian government, society, and commerce, all with interest in and/or affected by the future of the mining sector. The process resulted in the creation of three different scenarios for the Colombian mining sector to 2030. The article describes the participatory process used for involving the stakeholders, including the workshops and the mapping technique that was used. It also outlines the three scenarios and possible policies that should be considered by the Colombian government in …
Ammonia-Ca-K Competitive Ion-Exchange On Zeolites In Mining Wastewater Treatment: Batch Regeneration And Column Performance,
2020
Department of Civil Engineering, University of Ottawa, 161 Louis Pasteur Pvt., Ottawa, Ontario, K1N 6N5, Canada
Ammonia-Ca-K Competitive Ion-Exchange On Zeolites In Mining Wastewater Treatment: Batch Regeneration And Column Performance, Roberto Martín Narbaitz, Zachary G. Chartrand, Majid Sartaj, Jason Downey
Journal of Sustainable Mining
This manuscript addresses the treatment explosives-impacted mining wastewaters (EIMWW) using ion-exchange to remove elevated levels of ammonia. Repeated batch loading-regeneration cycles were conducted for two commercially available zeolite media used in the treatment of ammonia-ladenEIMWW to establish the effects of competing ions and regeneration solution composition. The Northern Ontario EIMWW tested contained 3.87 meq/L total ammonia (TA) as well as 2.85 meq/L Kþ and 3.9 meq/L Ca2þ.The media studied were a natural clinoptilolite and a modified clinoptilolite (SIR-600). Five regenerant solutions with different NaCl and KCl concentrations were evaluated. The presence of potassium in the regenerant was found to hinder …
