Uncertainty Analysis Of Operational Conditions In Selective Artificial Ground Freezing Applications,
2022
McGill University, Mining Engineering Department, Montreal, Quebec, Canada
Uncertainty Analysis Of Operational Conditions In Selective Artificial Ground Freezing Applications, Ahmad Zueter, Saad Akhtar, Agus Sasmito
Journal of Sustainable Mining
Artificial ground freezing (AGF) systems are susceptible to uncertain parameters highly affecting their performance. Particularly, selective artificial ground freezing (S-AGF) systems involve several uncertain operational conditions. In this study, uncertainty analysis is conducted to investigate four operational parameters: 1) coolant inlet temperature, 2) coolant flow rate, 3) pipes emissivity, and 4) pipes eccentricity. A reduced-order model developed and validated in our previous work for field-scale applications is exploited to simulate a total of 5,000 cases. The uncertain operational parameters are set according to Monte Carlo analysis based on field observations of a field-scale freeze-pipe in the mining industry extending to …
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 …
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 …
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 …
Two-Step Flotation And Reverse Flotation Circuits Of Iron Oxide And Its Process Minerology,
2022
Missouri University of Science and Technology
Two-Step Flotation And Reverse Flotation Circuits Of Iron Oxide And Its Process Minerology, Ying Hou, Song Lin, Guohui Fu, Zhuang Gai, Guang Yang, Ahmed Sobhy
Mining Engineering Faculty Research & Creative Works
Mining operations usually provide ore of varying characteristics. Similarly, for Donganshan Sintering Plant, the charges in iron oxide ore especially prior flotation process were investigated by conducting mineral liberation analyzer “MLA”. This in-deep study of process mineralogy explored and analyzed the mechanism of difficulty to obtain high-efficient flotation process. The MLA analysis results showed also that the main useful minerals in this ore are magnetite/hematite, and the main gangue minerals is quartz, followed by chlorite and ankerite. In addition, two-step “direct then reverse” and one step “reverse” flotation experiments were carried out and produced iron oxide concentrates of 48.91% and …
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 …
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.
Study On The Effect Of Coal Microscopic Pore Structure To Its Spontaneous Combustion Tendency,
2022
North China University of Science and Technology, College of Mining Engineering, China
Study On The Effect Of Coal Microscopic Pore Structure To Its Spontaneous Combustion Tendency, Xianwei Dong, Gaojing Li, Xuanmeng Dong, Fusheng Wang
Journal of Sustainable Mining
Coal is a porous medium. Due to the large number of pores in coal and the pore size on its surface, usually ranging from millimeter to nanometer, it is difficult to measure and analyze the microscopic pore structure of coal. In order to investigate the effect of the microscopic pore structure of coal on its spontaneous combustion tendency, coal samples from different coal mines of the Kailuan Group were selected as the research objects, and the data of the microscopic pore distribution of three different coal samples were measured by using mercury injection apparatus. The regression analysis of microscopic pore …
Influence Of Admixtures On The Performance Of Soundless Chemical Demolition Agents And Implications For Their Utilization,
2022
Carleton College, Department of Geology, Northfield, Minnesota, 55057, USA
Influence Of Admixtures On The Performance Of Soundless Chemical Demolition Agents And Implications For Their Utilization, Nattamon Maneenoi, Raphael Bissen, Sakonvan Chawchai
Journal of Sustainable Mining
Soundless Chemical Demolition Agents (SCDAs) are an environmentally friendly and safer alternative to traditional rock fragmentation methods. Admixtures are used to change the rheological properties and performance of SCDAs. This study aimed to investigate the effect of various concentrations of chemical accelerators (chloride salts) and viscosity enhancing agents (VEAs: Xanthan gum, Guar gum, and Gellan gum) on the fracture onset compared to an unmodified SCDA (BRISTAR 100®). All experiments were conducted on Portland Type 1 (OPC 1) cement blocks. The flowability of the mixtures was determined by mini-slump tests. Results show that 4wt% MgCl2 and 3wt% CaCl2 have accelerated the …
4d Gas Geological Research On Coal Seam With Gas Hazard Potential In Mining Panel,
2022
Henan Polytechnic University (HPU), School of Safety Science and Engineering, China
4d Gas Geological Research On Coal Seam With Gas Hazard Potential In Mining Panel, Hongqing Cui, Xin He, Zehua Wang
Journal of Sustainable Mining
According to regulations of the mining industry in China, it is necessary to carry out gas hazard prevention projects in advance when mining coal seams with gas hazard potential, and gas geological research should be taken as the basic work for optimal design and effective construction of gas hazard prevention projects. Research on coal seam with gas hazard potential have shown that anomalous geological area could be the gas hazard potential area as well, where superimposed tectonic and mining stress field usually results in tectonically disturbed coal and pressured gas. A 4D gas geological research method is used to find …
Impact Of The Ban On Illegal Mining Activities On Raw Water Quality: A Case-Study Of Konongo Water Treatment Plant, Ashanti Region Of Ghana,
2022
University of Energy and Natural Resources, Regional Centre for Energy and Environmental Sustainability (RCEES), P. O. Box 214 Sunyani, Ghana
Impact Of The Ban On Illegal Mining Activities On Raw Water Quality: A Case-Study Of Konongo Water Treatment Plant, Ashanti Region Of Ghana, Sadique Anyame Bawa, Prince Antwi-Agyei, Martin Kyereh Domfeh
Journal of Sustainable Mining
The Government of Ghana prohibited Artisanal and Small-Scale Mining (ASM) operations from 2017 to 2018 as part of its strategy to address the socio-environmental issues caused by illegal mining activities, also referred to as “galamsey” operations. This study assessed the trend in the water quality of raw water abstracted at the Konongo Water Treatment Plant (WTP) for treatment before and after implementing the ban on “galamsey” operations. The main source of raw water for the Konongo WTP is the Anuru River. Secondary data on physicochemical water quality from 2006 to 2019 was sourced from the Konongo WTP and the Ashanti …
Improved Methodology For Monitoring The Impact Of Mining Activities On Socio-Economic Conditions Of Local Communities,
2022
Department of Mining Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand 826 004, India
Improved Methodology For Monitoring The Impact Of Mining Activities On Socio-Economic Conditions Of Local Communities, Binay Prakash Pandey, Devi Prasad Mishra
Journal of Sustainable Mining
Mining activities can cause tangible socio-economic improvements in the surrounding regions. Such potential has not been fully realized, owing to the fact that the socio-economic impact assessment processes exercised in India merely predict the footprint of industrial activity on the surrounding population. Consequently, project proponents are mandated to implement a management plan in cases of foreseeable negative consequences. However, both, the assessment study, as well as the process of implementation of a management plan, are riddled with significant gaps and limitations. Primary data collected for this research makes it apparent that, in comparison to the revenue generated from the mining …
A Proper Borehole Pattern Design For Coal Seam Methane Drainage In Tabas Coal Mine Using Comsol Multiphysics,
2022
M.Sc. graduated in mining exploitation, Department of Mining and Metallurgical Eng., Yazd University, Yazd, Iran
A Proper Borehole Pattern Design For Coal Seam Methane Drainage In Tabas Coal Mine Using Comsol Multiphysics, Ali Bagherzadeh, Mehdi Najafi, Mohammad Fatehi Marji, Mehdi Noroozi
Journal of Sustainable Mining
Optimizing the operational parameters of the borehole pattern in the coal seam includes the maximum amount of gas to be drained with the least amount of drilling, investment, and drainage time. The main purpose of this research is to properly design the drainage borehole pattern in the C1 coal seam of the Tabas coal mine. In this research, the Comsol Multiphysics software was used for numerical modeling of the boreholes. According to the method of diffusion of methane gas in a coal seam, the reduction of methane gas concentration and the amount of gas released from the coal blocks were …
Use Of Insar In Linear Discontinuous Ground Deformation Generation Analysis: Case Study Of A Mine In Poland,
2022
Central Mining Institute, Department of Geology, Geophysics and Surface Protection, Katowice, Poland
Use Of Insar In Linear Discontinuous Ground Deformation Generation Analysis: Case Study Of A Mine In Poland, Bartosz Apanowicz
Journal of Sustainable Mining
Linear Discontinuous Ground Deformations are defined as fissures and steps, as well as structural forms composed of them. They occur on the surface as a result of underground mining. Knowledge of LDGDs has been acquired through field observations which are subsequently described in the scientific publication. Records of LDGDs are made by using the classic surveying method. The paper reviews the created LDGDs in the years 2015–2019 in one of the mines of the USCB. The analysis covers the velocity of subsidence as a result of underground mining and the values of horizontal strains determined according to the Knothe-Budryk theory. …
Low-Intensity Blast Induces Acute Glutamatergic Hyperexcitability In Mouse Hippocampus Leading To Long-Term Learning Deficits And Altered Expression Of Proteins Involved In Synaptic Plasticity And Serine Protease Inhibitors,
2022
Missouri University of Science and Technology
Low-Intensity Blast Induces Acute Glutamatergic Hyperexcitability In Mouse Hippocampus Leading To Long-Term Learning Deficits And Altered Expression Of Proteins Involved In Synaptic Plasticity And Serine Protease Inhibitors, Shanyan Chen, Heather R. Siedhoff, Hua Zhang, Pei Liu, Ashley Balderrama, Runting Li, Catherine E. Johnson, For Full List Of Authors, See Publisher's Website.
Mining Engineering Faculty Research & Creative Works
Neurocognitive consequences of blast-induced traumatic brain injury (bTBI) pose significant concerns for military service members and veterans with the majority of "invisible injury." However, the underlying mechanism of such mild bTBI by low-intensity blast (LIB) exposure for long-term cognitive and mental deficits remains elusive. Our previous studies have shown that mice exposed to LIB result in nanoscale ultrastructural abnormalities in the absence of gross or apparent cellular damage in the brain. Here we tested the hypothesis that glutamatergic hyperexcitability may contribute to long-term learning deficits. Using brain slice electrophysiological recordings, we found an increase in averaged frequencies with a burst …
Aerial Radiation Detection Identification And Measurement System Detector Material Comparison Study,
2022
20th CBRNE Command
Aerial Radiation Detection Identification And Measurement System Detector Material Comparison Study, Benjamin C. Troxell, Kacey D. Mcgee, Christina L. Dugan
Faculty Publications
The 20th Chemical Biological Radiological Nuclear and Explosives Command (CBRNE) currently utilizes an airborne sodium iodide gamma and beta detection system to map radiation fields over large areas of interest. The 20th CBRNE explored emergent detector technologies utilizing two detection materials; thallium-activated cesium iodide and high purity germanium (HPGe). These detectors were simulated at various altitudes and compared to background measurements. The sodium iodide detector failed to provide isotopic discrimination at distance. The thallium-activated cesium iodide CsI(Tl) detector provided sufficient absolute efficiency and energy resolution to identify isotopics at distance. The HPGe detector provided the best energy resolution. However, current …
Accident Analysis Of Mining Industry In The United States – A Retrospective Study For 36 Years,
2022
Department of Mineral Engineering, New Mexico Institute of Mining and Technology, Socorro, NM, USA and John and Willie Leone Family Department of Energy and Mineral Engineering, University Park, The Pennsylvania State University, State College, PA, USA
Accident Analysis Of Mining Industry In The United States – A Retrospective Study For 36 Years, Elham Rahimi, Younes Shekarian, Naser Shekarian, Pedram Roghanchi
Journal of Sustainable Mining
A retrospective study on accident analysis of the United States mines for 36 years was achieved using statistical analysis on the MSHA's accident databases between 1983 and 2018. A regression model of generalized estimation equation (GEE) was used for unbalanced panel data that provided 95,812 observations for 19,924 mine-ID-year in aggregate, coal, metal, and non-metal mines. The contributions of various parameters, including mine type, injured body part, days lost, age, and experience on the rate of accidents and injuries were investigated across the commodity types. The results showed coal miners in the East region are at a higher risk of …
The Use Of Microalgal Sourced Biodiesel To Help Underground Mines Transition To Battery Electric Vehicles,
2022
Laurentian University, Bharti School of Engineering, Canada
The Use Of Microalgal Sourced Biodiesel To Help Underground Mines Transition To Battery Electric Vehicles, Corey A. Laamanen, Kyle Moreau, Sabrina M. Desjardins, Shannon H. Mclean, John A. Scott
Journal of Sustainable Mining
The use of fossil fuel sourced diesel underground has various associated health and environmental hazards, and additional energy demand and costs associated with necessary ventilation. One way to reduce these impacts is by utilizing a biodieselblend, which generates lower levels of harmful emissions from underground equipment and can be produced regionally, reducing the impact of transportation. Furthermore, this would help allow use of existing machinery during transition towards more widespread electrification underground. Therefore, the concept of an integrated supply and use chain within the mining industry is examined based on biodiesel from acidophilic photosynthetic microalgae cultivated using CO 2 in …
Investigating The Effectiveness Of A Ground Support System Implemented On Block A: A Case Study Of Southern Africa Metalliferous Mine,
2022
University of Witwatersrand, School of Mining Engineering, Faculty of Engineering and Built Environment (FEBE), Johannesburg, South Africa
Investigating The Effectiveness Of A Ground Support System Implemented On Block A: A Case Study Of Southern Africa Metalliferous Mine, Kamogelo Manyelo, Peter Kolapo
Journal of Sustainable Mining
This study aims to investigate the effectiveness of the ground support systems that are planned to be implemented on Block A, which will be excavated through the Marikana fault zone. The block of ground being prepared for mining has been physically affected by the presence of the Marikana fault and is therefore geomechanically and geotechnically weaker than the normal stoping conditions on the rest of the shaft. Joint mapping conducted in Block A raiselines indicated that there is a high concentration of shallow dipping joints which are dipping in opposite directions. Such conditions present special challenges in the planned excavations …
