Jerada coal mining generates extensive coal mine waste rock(CMWR)piles rich in valuable minerals,posing environmental challenges and economic opportunities.This study examines reprocessing feasibility through 3D geome...Jerada coal mining generates extensive coal mine waste rock(CMWR)piles rich in valuable minerals,posing environmental challenges and economic opportunities.This study examines reprocessing feasibility through 3D geometallurgical characterization.Sampling used down the hole hammer drilling technique(DTH)and drone surveys for topographical precision.Over 620 samples from(T01,T02,T08)underwent comprehensive analyses including particle size distribution,x-ray fluorescence(XRF),total sulfur/carbon analysis(S/C),and inductively coupled plasma mass spectrometry(ICP-MS)for physical-chemical characterization.Mineralogical aspects were explored via optical microscopy(OM),X-ray diffraction(XRD),scanning electron microscopy(SEM),electron probe microanalysis(EPMA),and laser ablation inductively coupled plasma mass spectrometry(LA-ICP-MS).Quantitative mineral evaluation by scanning electron microscope(QEMSCAN)provided mineral insights.Chemical data was used in a 3D block model to quantify residual coal.Results for the three examined CMWR piles(T01,T02,and T08)showed varying D80 from 160 to 300μm,notable carbon content averaged 12.5 wt%(T01),16 wt%(T02),and 8.5 wt%(T08).Sulfur presence exceeded 1 wt%in T08,and potential environmental concerns due to iron sulfides.Anthracite liberation was below 30 wt%.3D modeling estimated a total volume of 7 Mm3,mainly from T08,equaling 11.2 Mt.With its high carbon content and substantial tonnages,re-exploitation or alternative applications could minimize these CMWR piles environmental impact.展开更多
This paper tentatively discusses the necessity and the requirements to better educate joint UB1-HIT master students from an engineering and engineer's perspective.The author argues that the students should have a ...This paper tentatively discusses the necessity and the requirements to better educate joint UB1-HIT master students from an engineering and engineer's perspective.The author argues that the students should have a broader engineering culture.After having given the context and basic definitions,the paper presents the author's view on how to better develop the engineering capabilities from a knowledge acquisition and learning point of view.Requirements for engineering education are addressed,based,among others,on the professional experience the first author built up while serving as senior manager in information technology and business transformation,at Capgemini Consulting(Belgium).A series of conclusions are given at the end of the paper.展开更多
Existing university training curricular are usually presented using text and tables.Semantics and inter-relationships between courses are often implicit or even not defined.This paper tentatively presents a formal mod...Existing university training curricular are usually presented using text and tables.Semantics and inter-relationships between courses are often implicit or even not defined.This paper tentatively presents a formal model of the joint UB1-HIT international master curriculum.The courses of the two years are modelled using UML and the relationships between the two years are explicitly shown.Complementarities between years 1 and 2 are also identified and possible improvements are discussed.展开更多
基金financial support from the International Research Chairs Initiativea program funded by the International Development Research Centre,Canada(IDRC)facilitated by the Canadian Research Chairs Program(108469-001 and 109418-006).
文摘Jerada coal mining generates extensive coal mine waste rock(CMWR)piles rich in valuable minerals,posing environmental challenges and economic opportunities.This study examines reprocessing feasibility through 3D geometallurgical characterization.Sampling used down the hole hammer drilling technique(DTH)and drone surveys for topographical precision.Over 620 samples from(T01,T02,T08)underwent comprehensive analyses including particle size distribution,x-ray fluorescence(XRF),total sulfur/carbon analysis(S/C),and inductively coupled plasma mass spectrometry(ICP-MS)for physical-chemical characterization.Mineralogical aspects were explored via optical microscopy(OM),X-ray diffraction(XRD),scanning electron microscopy(SEM),electron probe microanalysis(EPMA),and laser ablation inductively coupled plasma mass spectrometry(LA-ICP-MS).Quantitative mineral evaluation by scanning electron microscope(QEMSCAN)provided mineral insights.Chemical data was used in a 3D block model to quantify residual coal.Results for the three examined CMWR piles(T01,T02,and T08)showed varying D80 from 160 to 300μm,notable carbon content averaged 12.5 wt%(T01),16 wt%(T02),and 8.5 wt%(T08).Sulfur presence exceeded 1 wt%in T08,and potential environmental concerns due to iron sulfides.Anthracite liberation was below 30 wt%.3D modeling estimated a total volume of 7 Mm3,mainly from T08,equaling 11.2 Mt.With its high carbon content and substantial tonnages,re-exploitation or alternative applications could minimize these CMWR piles environmental impact.
文摘This paper tentatively discusses the necessity and the requirements to better educate joint UB1-HIT master students from an engineering and engineer's perspective.The author argues that the students should have a broader engineering culture.After having given the context and basic definitions,the paper presents the author's view on how to better develop the engineering capabilities from a knowledge acquisition and learning point of view.Requirements for engineering education are addressed,based,among others,on the professional experience the first author built up while serving as senior manager in information technology and business transformation,at Capgemini Consulting(Belgium).A series of conclusions are given at the end of the paper.
文摘Existing university training curricular are usually presented using text and tables.Semantics and inter-relationships between courses are often implicit or even not defined.This paper tentatively presents a formal model of the joint UB1-HIT international master curriculum.The courses of the two years are modelled using UML and the relationships between the two years are explicitly shown.Complementarities between years 1 and 2 are also identified and possible improvements are discussed.
