3D geometallurgical characterization of coal mine waste rock piles for their reprocessing purpose
Ayoub El Aallaoui1
Abdellatif Elghali2
Rachid Hakkou3
Yassine Taha2
Mostafa Benzaazoua2
Mustapha El Ghorfi4
1.Laboratory of Geo Resources,Geo Environment and Civil Engineering(L3G),Faculty of Science and Technology Gueliz,Cadi Ayyad University(UCA),Avenue A.Elkhattabi,BP549,40000 Marrakech,Morocco2.Geology and Sustainable Mining Institute(GSMI),Mohammad Ⅵ Polytechnic University(UM6P),Lot 660.Hay Moulay Rachid,43150 Ben Guerir,Morocco3.Geology and Sustainable Mining Institute(GSMI),Mohammad Ⅵ Polytechnic University(UM6P),Lot 660.Hay Moulay Rachid,43150 Ben Guerir,Morocco;Laboratory of Innovative Materials,Energy and Sustainable Development(IMED-Lab),Faculty of Science and Technology Gueliz,Cadi Ayyad University(UCA),Avenue A.Elkhattabi,BP549,40000 Marrakech,Morocco4.Laboratory of Geo Resources,Geo Environment and Civil Engineering(L3G),Faculty of Science and Technology Gueliz,Cadi Ayyad University(UCA),Avenue A.Elkhattabi,BP549,40000 Marrakech,Morocco;Geology and Sustainable Mining Institute(GSMI),Mohammad Ⅵ Polytechnic University(UM6P),Lot 660.Hay Moulay Rachid,43150 Ben Guerir,Morocco
摘要：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 charac-terization.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 exam-ined CMWR piles(T01,T02,and T08)showed varying D80 from 160 to 300 μm,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.
机标关键词：geometapurposelurgimetalrockgicatallmine
论文发表日期：2025-02-28
在线出版日期：2025-10-15（本平台首次上网日期，不代表文献的发表时间）
页数：24( 281-304 )
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