Carbonised Fluidised Fly Ash (Cffa); A New Product For Mining Engineering Purposes (Discussion Of Possible Applications),
2022
Central Mining Institute, Department of Solid Fuels Quality Assessment, Katowice, Poland
Carbonised Fluidised Fly Ash (Cffa); A New Product For Mining Engineering Purposes (Discussion Of Possible Applications), Marian Jacek Łączny, Przemysław Rompalski
Journal of Sustainable Mining
The article presents and summarises the current state of research and laboratory results on the carbonation of fly ash with carbon dioxide in the context of its use in mining engineering. Based on previous publications and patent applications, the possibilities of using carbonated fly ash from fluidised bed boilers for the following applications were discussed: securing excavations particularly susceptible to fire hazards, shotcreting and securing longwalls and supports, constructing cases, securing decommissioned shafts, and others, which means wherever the use of cement is required. It was pointed out that the removal of excess free calcium oxide makes it possible to …
Addressing Specific Safety And Occupational Health Challenges For The Canadian Mines Located In Remote Areas Where Extreme Weather Conditions Dominate,
2022
McGill University, Mining and Materials Engineering Department, Montreal, Quebec
Addressing Specific Safety And Occupational Health Challenges For The Canadian Mines Located In Remote Areas Where Extreme Weather Conditions Dominate, Rachid Halabi, Mustafa Kumral
Journal of Sustainable Mining
The number of mining operations is increasing in the Canadian North, where extreme weather conditions govern. Currently, many mine development projects are also in progress in this region. These mines’ working atmosphere and employment circumstances are highly different from regular mines. One of the main differences is the special safety issues of the Canadian North. The primary sources of these special issues are: the difficulty of finding skilled employees; high employee turnover rate; insufficient training and certification requirements; delicate employment circumstances affecting the psychological well-being of employees; permafrost; mine inspection challenges; inventory and logistic hardship; and the legislative and regulative …
Mechanical Behavior Of Single-Flawed Cylindrical Specimens Subjected To Axial Loading: A Numerical Investigation,
2022
Missouri University of Science and Technology
Mechanical Behavior Of Single-Flawed Cylindrical Specimens Subjected To Axial Loading: A Numerical Investigation, Mostafa Asadizadeh, Saeed Khosravi, Javad Karimi, Taghi Sherizadeh, Sanaz Vajedian, Mohammad Farouq Hossaini
Mining Engineering Faculty Research & Creative Works
Discontinuities are inherent components of rock masses and can range from fissures to large faults. Single fissures, the so-called flaws, may affect the mechanical behavior of rock mass, crack initiation, and propagation. In this paper, numerical investigations have been conducted on central-flawed cylindrical specimens subjected to axial loading to investigate the effect of flaw angle (α), length (2a), and aperture (A) on their mechanical behavior and crack development. Particle Flow Code (PFC3D) was adopted to investigate the cracking process of the cylindrical specimens and maximum principal stresses at flaw tips. The numerical models are calibrated and verified using extensive experimental …
Out Of The Blue: Volcanic So2 Emissions During The 2021–2022 Eruptions Of Hunga Tonga—Hunga Ha’Apai (Tonga),
2022
Michigan Technological University
Out Of The Blue: Volcanic So2 Emissions During The 2021–2022 Eruptions Of Hunga Tonga—Hunga Ha’Apai (Tonga), S. A. Carn, N. A. Krotkov, B. L. Fisher, C. Li
Michigan Tech Publications
Most volcanism on Earth is submarine, but volcanic gas emissions by submarine eruptions are rarely observed and hence largely unquantified. On 15 January 2022 a submarine eruption of Hunga Tonga-Hunga Ha’apai (HTHH) volcano (Tonga) generated an explosion of historic magnitude, and was preceded by ∼1 month of Surtseyan eruptive activity and two precursory explosive eruptions. We present an analysis of ultraviolet (UV) satellite measurements of volcanic sulfur dioxide (SO2) between December 2021 and the climactic 15 January 2022 eruption, comprising an unprecedented record of Surtseyan eruptive emissions. UV measurements from the Ozone Monitoring Instrument (OMI) on NASA’s Aura satellite, the …
Pre-Eruptive Excess Volatiles And Their Relationship To Effusive And Explosive Eruption Styles In Semi-Plugged Volcanoes,
2022
Asian School of the Environment
Pre-Eruptive Excess Volatiles And Their Relationship To Effusive And Explosive Eruption Styles In Semi-Plugged Volcanoes, Sri Budhi Utami, Juan Andùjar, Fidel Costa, Bruno Scaillet, Hanik Humaida, Simon Carn
Michigan Tech Publications
Understanding the role of various factors influencing eruption style is challenging, but it can aid in adapting different hazard mitigations and crisis responses for explosive or effusive events. Here, we focus on the role of magma storage conditions in controlling eruption styles at basaltic andesite volcanoes, and how they can be related to monitoring data. We study the cycle of explosive (1990, sub-Plinian) → effusive (2007, dome) → explosive (2014, sub-Plinian) eruptions from Kelud (Kelut) volcano, Indonesia. We conducted petrological analyses of the eruption products and phase equilibria experiments using pumice and explored a range of temperatures, pressures, oxygen fugacity, …
A Heuristic Approach To Predict The Tensile Strength Of A Non-Persistent Jointed Brazilian Disc Under Diametral Loading,
2022
Missouri University of Science and Technology
A Heuristic Approach To Predict The Tensile Strength Of A Non-Persistent Jointed Brazilian Disc Under Diametral Loading, Mostafa Asadizadeh, Nima Babanouri, Taghi Sherizadeh
Mining Engineering Faculty Research & Creative Works
The mechanical response of rock bridges plays a key role in the stability of concrete and rock structures. In particular, the tensile failure of non-persistent discontinuities can result in their coalescence and the failure of rock or concrete engineering structures. The effect of non-persistent joint parameters on rock structures' failure under tensile mode has not been investigated by many researchers yet. Many non-persistent jointed Brazilian concrete discs are tested under diametral loading in this work, to study the influence of joint spacing, joint continuity factor, loading direction with regard to joint angle, and bridge angle on their tensile behavior. Heuristic …
Wettability Alteration Process At Pore-Scale During Engineered Waterflooding Using Computational Fluid Dynamics,
2022
Missouri University of Science and Technology
Wettability Alteration Process At Pore-Scale During Engineered Waterflooding Using Computational Fluid Dynamics, Yongqiang Chen, Ping Chang, Guang Xu, Quan Xie
Mining Engineering Faculty Research & Creative Works
Engineered waterflooding modifies chemistry of injected brine to efficiently and environmentally friendly enhance oil recovery. The common practice of engineered waterflooding includes low salinity waterflooding (LSW) and carbonated waterflooding. Among these oil recovery methods, wettability alteration has been perceived as a critical physicochemical process for additional oil recovery. While extensive work has been conducted to characterize the wettability alteration, the existing theory cannot explain the conflict oil recovery between secondary mode (injecting engineered water at the very beginning of flooding) and tertiary mode (injecting engineered water after conventional waterflooding), where secondary engineered waterflooding always gives a greater incremental oil recovery …
Project Khepri: Mining Asteroid Bennu For Water,
2022
Western University
Project Khepri: Mining Asteroid Bennu For Water, Erika Frost, Gowtham Boyala, Adam Gremm, Ahmet Gungor, Amirhossein Taghipour, Massimo Biella, Jiawei "Jackson" Qiu, Athip Thirupathi Raj, Arjun Chhabra, Adam Gee, Saanjali Maharaj, Erin Richardson, Julia Empey, Haidar Ali Abdul-Nabi, Lindsay Richards, Ariyaan Talukder, Aaron Groh, Brie Miklaucic, Jd Carlson, Kristina Kim, Maverick Cue
Undergraduate Student Research Internships Conference
Deep space asteroid mining presents the opportunity for the collection of critical resources required to establish a cis-lunar infrastructure. In specific, the Project Khepri team has focused on the collection of water from asteroid Bennu. This water has the potential to provide a source of clean-energy propellant as well as an essential consumable for humans or agriculture on crewed trips to the Moon or Mars. This would avoid the high costs of launching from Earth - making it a highly desirable element for the future of cis-lunar infrastructure. The OSIRIS-REx mission provided a complete survey of asteroid Bennu and is …
Application Of Fuzzy Logic And Fractal Modeling Approach For Groundwater Potential Mapping In Semi-Arid Akka Basin, Southeast Morocco,
2022
Université Ibn Zohr
Application Of Fuzzy Logic And Fractal Modeling Approach For Groundwater Potential Mapping In Semi-Arid Akka Basin, Southeast Morocco, Fatima Zahra Echogdali, Said Boutaleb, Rosine Basseu Kpan, Mohammed Ouchchen, Amine Bendarma, Hasna El Ayady, Kamal Abdelrahman, Mohammed S. Fnais, Kochappi Sathyan Sajinkumar, Mohamed Abioui
Michigan Tech Publications
Groundwater potential delineation in the Akka basin, southwest Morocco, has been determined through the combination of geospatial techniques and geological data. The geometric average and expected value are two multi-criteria approaches used to integrate a set of factors–data for which the weights of each factor are assigned using the fuzzy logic function, which transforms values of factors influencing groundwater presence in a range of [0, 1]. The efficiency factors used in this study are the lineament density, node density, drainage density, distance from rivers, distance from lineament, permeability, slope, topographic witness index, plan curvature, and profile curvature. Thereafter, the groundwater …
Investigating The Causes Of Stope Instability At Golden Valley Mine,
2022
Manicaland State University of Applied Sciences, Department of Mining and Mineral Processing Engineering, Mutare, Zimbabwe / Central South University, School of Resources and Safety Engineering, Changsha, China
Investigating The Causes Of Stope Instability At Golden Valley Mine, Ashley Ruvimbo Sabao, Prosper Munemo, Peter Kolapo
Journal of Sustainable Mining
The study is based on mining operations that are concentrated in a ground exposed to flooding with varying stope dimensions. Stope stability was assessed in the four stopes, which resembled the mine’s different ground conditions using the stability graph complemented by the equivalent linear over break slough (ELOS) stability approach. The stability graph showed that the stopes in rock masses exposed to flooding fell in the potentially unstable and caving zones whereas the ones that were not affected by flooding fell in the stable zones. The ELOS approach showed that mining the previously flooded rock masses resulted in high over-breaks …
Contents,
2022
Universitas Indonesia
Contents, Jaka Fajar Fatriansyah
Journal of Materials Exploration and Findings (JMEF)
No abstract provided.
The Optimization Of Failure Risk Estimation On The Uniform Corrosion Rate With A Non-Linear Function,
2022
Universitas Indonesia
The Optimization Of Failure Risk Estimation On The Uniform Corrosion Rate With A Non-Linear Function, Fernanda Hartoyo, Jaka Fajar Fatriansyah, Imam Abdillah Mas'ud, Farhan Rama Digita, Hanna Ovelia, Datu Rizal Asral
Journal of Materials Exploration and Findings (JMEF)
Failures in the oil and gas pipeline system are conditions that must be avoided and anticipated because the losses due to the failures can occur at a very high level. Internal corrosion is one of the significant causes of the failures in pipeline systems. In addition, this type of corrosion is due to the high content of carbon dioxide and other corrosive substances in crude oil and natural gas. Therefore, an optimal inspection scheduling system is required to prevent the possibility of pipeline failures due to corrosion and to avoid any overspending on the budget due to excessive inspection scheduling. …
Preface Of Volume 1 Issue 1 On Journal Of Materials Exploration And Findings (Jmef),
2022
Universitas Indonesia
Preface Of Volume 1 Issue 1 On Journal Of Materials Exploration And Findings (Jmef), Jaka Fajar Fatriansyah
Journal of Materials Exploration and Findings (JMEF)
No abstract provided.
Unplanned Dilution Prediction In Open Stope Mining: Developing New Design Charts Using Artificial Neural Network Classifier,
2022
a Nazarbayev University, School of Mining and Geosciences
Unplanned Dilution Prediction In Open Stope Mining: Developing New Design Charts Using Artificial Neural Network Classifier, Sultan Korigov, Amoussou Coffi Adoko, Fhatuwani Sengani
Journal of Sustainable Mining
Minimizing dilution is essential in open stope mine design as excessive unplanned dilution can compromise the operation's profitability. One of the main challenges associated with the empirical dilution graph method used to design open stopes is how to determine the boundary of the dilution zones objectively. Hence, this paper explores the implementation of machine learning classifiers to bridge this gap in the conventional dilution graph method. Stope performance data consisting of the stope dilution (unplanned dilution), the modified stability number, and the hydraulic radius were compiled from a mine located in Kazakhstan. First, the conventional dilution graph methods were used …
Novel Approach For The Destress Blasting In Hard Rock Underground Copper Mines,
2022
KGHM CUPRUM Ltd. Research and Development Centre, Department of Rock Engeenering, 2-8 Sikorskiego Street, 53-659 Wrocław, Poland
Novel Approach For The Destress Blasting In Hard Rock Underground Copper Mines, Piotr Mertuszka, Marcin Szumny, Krzysztof Fuławka, Piotr Kondoł
Journal of Sustainable Mining
The present study investigates the possibility of developing a novel method for reducing seismicity and rockbursts in deep underground mines based on modifying drilling and blasting patterns. The main goal was to develop and implement firing patterns for multi-face production blasting, which allow increasing the capability of inducing stress relief in the rock mass, manifested in the seismic event. This method may improve stability control in underground workings, and mitigate risks associated with the dynamic effects of rock mass pressure compared with currently used methods. Thus, the seismic energy may be released immediately after blasting in a controlled way. For …
Replacing Combustion Engines With Hydrogen Fuel Cells To Power Mining Haul Trucks: Challenges And Opportunities,
2022
Missouri University of Science and Technology
Replacing Combustion Engines With Hydrogen Fuel Cells To Power Mining Haul Trucks: Challenges And Opportunities, Ayorinde Akinrinlola
Masters Theses
"With the proven advantage of higher energy density in hydrogen fuel cells over batteries, there is potential to apply fuel cells to power mining haul trucks. This study aims to evaluate the technical and economic feasibility of hydrogen fuel cell electric mine trucks as an alternative to current mine haul trucks. Specifically, the project: (1) developed an economic framework for evaluating the integration of renewable energy powered haul trucks into mining; and (2) applied vehicle drivetrain and energy simulation in Matlab/Simulink to elucidate the challenges and opportunities of incorporating hydrogen fuel cell technology into the current form factors of mine …
Challenges Of Modeling Rainfall Triggered Landslides In A Data-Sparse Region: A Case Study From The Western Ghats, India,
2022
Michigan Technological University
Challenges Of Modeling Rainfall Triggered Landslides In A Data-Sparse Region: A Case Study From The Western Ghats, India, C. L. Vishnu, T. Oommen, Snehamoy Chatterjee, K. S. Sajinkumar
Michigan Tech Publications
Accurate rainfall estimates are required to forecast the spatio-temporal distribution of rain-triggered landslides. In this study, a comparison between rain gauge and satellite rainfall data for assessing landslide distribution in a data-sparse region, the mountainous district of Idukki, along the Western Ghats of southwestern India, is carried out. Global Precipitation Mission Integrated Multi-satellitE Retrievals for GPM-Late (GPM IMERG-L) rainfall products were compared with rain gauge measurements, and it was found that the satellite rainfall observations were underpredicting the actual rainfall. A conditional merging algorithm was applied to develop a product that combines the accuracy of rain gauges and the spatial …
Flood Hazard Index Application In Arid Catchments: Case Of The Taguenit Wadi Watershed, Lakhssas, Morocco,
2022
Université Ibn Zohr
Flood Hazard Index Application In Arid Catchments: Case Of The Taguenit Wadi Watershed, Lakhssas, Morocco, Mustapha Ikirri, Farid Faik, Fatima Zahra Echogdali, Isabel Margarida Horta Ribeiro Antunes, Mohamed Abioui, Kamal Abdelrahman, Mohammed S. Fnais, Abderrahmane Wanaim, Mouna Id-Belqas, Said Boutaleb, Kochappi Sathyan Sajinkumar, Adolfo Quesada-Román
Michigan Tech Publications
During the last decade, climate change has generated extreme rainfall events triggering flash floods in short periods worldwide. The delimitation of flood zones by detailed mapping generally makes it possible to avoid human and economic losses, especially in regions at high risk of flooding. The Taguenit basin, located in southern Morocco, is a particular case. The mapping of the flood zones of this basin by the method of the Flood Hazard Index (FHI) in a GIS geographic information systems environment was based on the multi-criteria analysis, taking into consideration the seven parameters influencing these extreme phenomena, namely rainfall, slope, flow …
Research Advances Into Mine Safety Science And Engineering,
2022
McGill University, Department of Mining and Materials Engineering , Montreal, Canada H3A 0E8
Research Advances Into Mine Safety Science And Engineering, Hani Mitri, Rudrajit Mitra, Ting Ren
Journal of Sustainable Mining
No abstract provided.
Evaluation Of Various Data Acquisition Scenarios For The Retrieval Of Seismic Body Waves From Ambient Noise Seismic Interferometry Technique Via Numerical Modeling,
2022
Xuzhou University of Technology
Evaluation Of Various Data Acquisition Scenarios For The Retrieval Of Seismic Body Waves From Ambient Noise Seismic Interferometry Technique Via Numerical Modeling, Haitao Cao, Erdi Apatay, Garvie Crane, Boming Wu, Ke Gao, Roohollah Askari
Michigan Tech Publications
Seismic interferometry is often proposed as a cost-efficient technique for reservoir monitoring including CO2 sequestration due to its low cost and environmental advantages over active source imaging. Although many studies have demonstrated the ability of seismic interferometry to retrieve surface waves, body wave imaging remains challenging due to their generally lower amplitudes of body waves in seismic interferometry data. An optimum data acquisition strategy can help retrieve low amplitude body waves better, however, rare attempts have been made to evaluate various data acquisition strategies. In this study, we use numerical modeling to examine three different acquisition schemes to evaluate the …
