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Exploring the potential of olivine-containing copper-nickel slag for carbon dioxide mineralization in cementitious materials

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International Journal of Minerals,Metallurgy and Materials 2024年第3期31卷 562-573页

作者： Qianqian Wang Zequn Yao lijie guo Xiaodong Shen College of Materials Science and Engineering Nanjing Tech UniversityNanjing 211816China State Key Laboratory of Materials-Oriented Chemical Engineering Nanjing 211816China BGRIMM Technology Group Beijing 100160China

Water-quenched copper-nickel metallurgical slag enriched with olivine minerals exhibits promising potential for the production of CO_(2)-mineralized cementitious materials.In this work,copper-nickel slag-based cementitious material(CNCM)was synthesized by using different chemical activation methods to enhance its hydration reactivity and CO_(2) mineralization capacity.Different water curing ages and carbonation conditions were explored related to their carbonation and mechanical properties development.Meanwhile,thermogravimetry differential scanning calorimetry and X-ray diffraction methods were applied to evaluate the CO_(2) adsorption amount and carbonation products of CNCM.Microstructure development of carbonated CNCM blocks was examined by backscattered electron imaging(BSE)with energy-dispersive X-ray spectrometry.Results showed that among the studied samples,the CNCM sample that was subjected to water curing for 3 d exhibited the highest CO_(2) sequestration amount of 8.51wt%at 80℃and 72 h while presenting the compressive strength of 39.07 MPa.This result indicated that 1 t of this CNCM can sequester 85.1 kg of CO_(2) and exhibit high compressive strength.Although the addition of citric acid did not improve strength development,it was beneficial to increase the CO_(2) diffusion and adsorption amount under the same carbonation conditions from BSE results.This work provides guidance for synthesizing CO_(2)-mineralized cementitious materials using large amounts of metallurgical slags containing olivine minerals.

关键词： copper-nickel slag fayalite CO_(2)sequestration cementitious material admixtures carbonation conditions

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Physical model investigation on effects of drainage condition and cement addition on consolidation behavior of tailings slurry within backfilled stopes

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International Journal of Minerals,Metallurgy and Materials 2023年第8期30卷 1490-1501页

作者： Qinghai Ma Guangsheng Liu Xiaocong Yang lijie guo School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China BGRIMM Technology Group Beijing 100160China National Centre for International Research on Green Metal Mining Beijing 100160China

Estimation of stressses within the tailings slurry during self-weight consolidation is a critical issue for cost-effective barricade design and efficient backfill planning in underground mine stopes.This process requires a good understanding of self-weight consolidation behaviors of the tailings slurry within practical stopes,where many factors can have significant effects on the consolidation,including drainage condition and cement addition.In this paper,the prepared tailings slurry with different cement contents(0,4.76wt%,and 6.25wt%)was poured into1.2 m-high columns,which allowed three drainage scenarios(undrained,partial lateral drainage near the bottom part,and full lateral drainage boundaries)to investigate the effects of drainage condition and cement addition on the consolidation behavior of the tailings slurry.The consolidation behavior was analyzed in terms of pore water pressure(PWP),settlement,volume of drainage water,and residual water content.The results indicate that increasing the length of the drainage boundary or cement content aids in PWP dissipation.In addition,constructing an efficient drainage boundary was more favorable to PWP dissipation than increasing cement addition.The final stable PWP on the column floor was not sensitive to cement addition.The final settlement of uncemented tailings slurry was independent of drainage conditions,and that of cemented tailings slurry decreased with the increase in cement addition.Notably,more pore water can drain out from the cemented tailings slurry than the uncemented tailings slurry during consolidation.

关键词： tailings backfill consolidation slurry drainage cement content physical model test

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An ERA5 tropospheric parameters-augmented approach for improving GNSS precise point positioning

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Geodesy and Geodynamics 2023年第5期14卷 467-476页

作者： Liangke Huang Feifan Liu lijie guo Guiwen Lan Lv Zhou Cheng Wang Lilong Liu College of Geomatics and Geoinformation Guilin University of TechnologyGuilin 541006China Wuhan Changjiang Waterway Rescue and Salvage Bure Wuhan 430014China Guangxi Institute of Natural Resources Survey and Monitoring Nanning530023China

Precise Point Positioning(PPP) technology has developed into a potent instrument for geodetic positioning, ionospheric modeling, tropospheric atmospheric parameter detection, and seismic monitoring.As atmospheric reanalysis data products’ accuracy and spatiotemporal resolution have improved recently, it has become important to apply these products to obtain high-accuracy tropospheric delay parameters, like zenith tropospheric delay(ZTD) and tropospheric horizontal gradient. These tropospheric delay parameters can be applied to PPP to reduce the convergence time and to increase the accuracy in the vertical direction of the position. The European Centre for Medium-Range Weather Forecasts Reanalysis 5(ERA5) atmospheric reanalysis data is the latest product with a high spatiotemporal resolution released by the European Center for Medium-Range Weather Forecasts(ECMWF). Only a few researches have evaluated the application of ERA5 data to Global Navigation Satellite System(GNSS)PPP. Therefore, this study compared and validated the ZTD products derived from ERA5 data using ZTD values provided by 290 global International GNSS Service(IGS) stations for 2016-2017. The results indicated a stable performance for ZTD, with annual average bias and RMS values of 0.23 cm and 1.09 cm,respectively. Further, GNSS observations for one week in each of the four seasons(spring: DOY 92-98;summer: DOY 199-205;autumn: DOY 275-281;and winter: DOY 22-28) from 34 multi-GNSS experiments(MGEX) stations distributed globally in 2016 were considered to evaluate the performance of ERA5-derived tropospheric delay products in GNSS PPP. The performance of ERA5-enhanced PPP was compared with that of the two standard GNSS PPP schemes(without estimated tropospheric horizontal gradient and with estimated tropospheric horizontal gradient). The results demonstrated that ERA5-enhanced GNSS PPP showed no significant improvement in the convergence times in both the Eastern(E) and Northern(N) directions, while the average convergence time over four weeks in the

关键词： Precise point positioning ERA5 atmospheric reanalysis data Multi-GNSS Tropospheric delay

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VG,encoding a thylakoid formation protein,regulates the formation of variegated leaves in tomato

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Horticultural Plant Journal 2023年第1期9卷 98-108页

作者： Jianwen Song lijie guo Lele Shang Wenqian Wang Chuying Yu Zhibiao Ye Junhong Zhang Key Laboratory of Horticultural Plant Biology(Ministry of Education) Huazhong Agricultural UniversityWuhanHubei 430070China

Leaf-color mutations have been studied extensively in plants.However,to better understand the complex mechanisms underlying the formation of leaf color,it is essential to continue discover novel genes involved in the process of leaf color development.In this study,we identified a variegated-leaf(vg)mutant in tomato that exhibited defective phenotypes in thylakoids and photosynthesis.To clone the vg locus,an F2population was constructed from the cross between the vg mutant(Solanum lycopersicum)and the wild tomato LA1589(S.pimpinellifolium).Using the map-based cloning approach,the vg locus was mapped on chromosome 7 and narrowed down to a 128 kb region that contained 21 open reading frames(ORFs).The expression levels of ORF9,ORF10,and ORF13 were significantly lower in vg than in the wild-type plants,while the ORF11 transcript level was elevated in vg.We then mutagenized ORF9,ORF10,and ORF13 by the CRISPR/Cas9 system in the wild-type tomato background and found that only the ORF10 mutation reproduced the phenotype of variegated leaves,indicating that ORF10 represents VG and its down-regulated expression was responsible for the variegated leaf phenotype.ORF10 encodes a thylakoid formation protein and its mutant lines showed reduced levels of chlorophyll synthesis and photosynthesis.Taken together,these results suggest that VG is necessary for chloroplast development,chlorophyll synthesis,and photosynthesis in tomato.

关键词： Chloroplast Genetic mapping Mutation Tomato Variegated leaves

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地下矿山采场充填柔性封闭方法与应用

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采矿与安全工程学报 2024年第1期41卷 86-94页

作者：李宗楠郭利杰彭啸鹏赵越余斌矿冶科技集团有限公司北京100160 北京科技大学土木与资源工程学院北京100083 国家金属矿绿色开采国际联合研究中心北京102628

地下矿山采用充填法进行开采需要在采空区充填之前构筑封闭挡墙,高质量安全封闭技术是充填采空区的重要环节。研制了装配式柔性脱水充填挡墙,墙体骨架呈弧形网格状曲面结构,采用装配式建构方式,能够适应巷道规格变化,密封层使用透水织物... 详细信息

地下矿山采用充填法进行开采需要在采空区充填之前构筑封闭挡墙,高质量安全封闭技术是充填采空区的重要环节。研制了装配式柔性脱水充填挡墙,墙体骨架呈弧形网格状曲面结构,采用装配式建构方式,能够适应巷道规格变化,密封层使用透水织物,具有全断面脱水特征。设计了3.5 m×4.0 m规格试验挡墙,并在阶段空场充填采矿法和进路式充填采矿法充填采场开展了工业试验。结果表明:试验挡墙在过墙期间具有较好的脱水效果,高浓度料浆多次充填试验测得的墙体变形量未超过10 mm,膏体料浆一次充全高,最大变形量为34 mm,均在允许变形范围内。扩大试验安装成本分析表明,挡墙的综合换算成本约为435元/m^(3),验证了装配式柔性脱水充填挡墙的技术经济综合优势。

关键词：矿山充填技术柔性封闭技术装配式挡墙弧形挡墙低成本挡墙

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围岩-充填体组合承载宏细观损伤演化机理

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中国矿业大学学报 2024年第2期53卷 277-290页

作者：张雯李泽峰郭利杰郭进平王小林张宝华西安建筑科技大学资源工程学院陕西西安710055 矿冶科技集团有限公司北京100160

充填体与围岩共同承载地应力,揭示其组合体宏细观损伤演化机理有助于完善充填体与围岩相互作用理论和优化充填体的配比和强度设计.开展不同灰砂比的围岩-充填体组合体单轴压缩试验和数值模拟,分析宏观下应力-应变曲线、力学参数及破坏模... 详细信息

充填体与围岩共同承载地应力,揭示其组合体宏细观损伤演化机理有助于完善充填体与围岩相互作用理论和优化充填体的配比和强度设计.开展不同灰砂比的围岩-充填体组合体单轴压缩试验和数值模拟,分析宏观下应力-应变曲线、力学参数及破坏模式,细观下裂纹扩展、能量变化及损伤演化规律.结果表明:灰砂比越高,组合体的峰值强度和弹性模量越大,峰值应变越小;组合体发生张拉剪切混合式破坏,低灰砂比时接触界面产生断裂破坏,高灰砂比时分层界面产生宏观裂隙;峰前阶段,接触界面和分层界面等薄弱部分先出现微裂纹,组合体以弹性应变能的转化为主,伴随小幅度能量损耗,损伤程度较低;峰后阶段,组合体耗散能急速增长并超过弹性应变能,内部损伤程度加速恶化.围岩内部裂纹数量大幅增加并迅速扩展贯通,率先出现宏观断裂面,充填体内部裂纹汇聚合并于分层界面,在高灰砂比时发挥良好的协同支护作用.

关键词：围岩-充填体结构界面裂纹扩展能量演化损伤演化机理

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基于矿冶废渣制备充填专用胶凝材料

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有色金属工程 2024年第5期14卷 130-134页

作者：董峰李明郭利杰杨超山东理工大学山东淄博255000 福建省政和县源鑫矿业有限公司福建政和353601 矿冶科技集团有限公司北京100160 国家金属矿绿色开采国际联合研究中心北京102628

首先测定了矿冶废渣及原材料的基本化学性质,并根据测试结果研发了复合型强碱性激发剂,用于激发矿冶废渣活性,从而制备出适用于矿山充填专用胶凝材料;通过XRD测试了充填专用胶凝材料硬化体中的水化反应产物,结果表明:支撑充填体强度的... 详细信息

首先测定了矿冶废渣及原材料的基本化学性质,并根据测试结果研发了复合型强碱性激发剂,用于激发矿冶废渣活性,从而制备出适用于矿山充填专用胶凝材料;通过XRD测试了充填专用胶凝材料硬化体中的水化反应产物,结果表明:支撑充填体强度的主要物质为钙矾石(AFt)和氢氧化钙(CH)、铝胶(AH 8-10)、水化硅酸钙(C-S-H)、水化硅铝酸钙(C-A-S-H)等。一个AFt分子形成会结合和吸附32个H_(2)O分子,表明矿山充填专用胶凝材料更适合含水量较大的尾砂充填料浆。同时采用SEM分析了不同龄期充填硬化体内部结构,揭露了充填硬化体强度增长规律,并分析了各阶段硬化体产生强度的机理;通过强度试验测试了不同条件下两种胶凝材料充填体强度,结果表明充填专用胶凝材料(KS)制备的充填体强度指标高于水泥(SN)制备的充填体强度,强度值相差1倍。

关键词：胶凝材料矿冶废渣微观结构分析充填体强度水化反应

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Accuracy Analysis for 6-DOF PKM with Sobol Sequence Based Quasi Monte Carlo Method

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Journal of Harbin Institute of Technology(New Series) 2015年第5期22卷 1-8页

作者： Jianguang Li Jian Ding lijie guo Yingxue Yao Zhaohong Yi Huaijing Jing Honggen Fang School of Mechatronics Engineering Harbin Institute of Technology Shanghai Aerospace Equipments Manufacturer

To improve the precisions of pose error analysis for 6-dof parallel kinematic mechanism( PKM)during assembly quality control,a Sobol sequence based on Quasi Monte Carlo( QMC) method is introduced and implemented in pose accuracy analysis for the PKM in this paper. The Sobol sequence based on Quasi Monte Carlo with the regularity and uniformity of samples in high dimensions,can prevail traditional Monte Carlo method with up to 98. 59% and 98. 25% enhancement for computational precision of pose error statistics.Then a PKM tolerance design system integrating this method is developed and with it pose error distributions of the PKM within a prescribed workspace are finally obtained and analyzed.

关键词： accuracy analysis quasi monte carlo(QMC) sobol sequence parallel kinematic mechanism(PKM)

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从中国石油对外合作项目看国内企业安全监管效能提升路径

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北京石油管理干部学院学报 2024年第1期31卷 38-43页

作者：郭立杰郭璐宋文娟中国石油天然气集团有限公司质量健康安全环保部中国石油集团安全环保技术研究院有限公司

中国石油对外合作项目经过多年运营,安全生产业绩均处于国内企业前列,本文总结了其安全生产监管的经验,并对责任、制度、文化、机制等掣肘国内企业安全生产监管效能提升的问题有了新的认识。针对国内企业安全生产形势,提出了安全生产监... 详细信息

中国石油对外合作项目经过多年运营,安全生产业绩均处于国内企业前列,本文总结了其安全生产监管的经验,并对责任、制度、文化、机制等掣肘国内企业安全生产监管效能提升的问题有了新的认识。针对国内企业安全生产形势,提出了安全生产监管效能提升路径。

关键词：对外合作项目安全生产安全监管效能

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新形势下国家重点实验室的管理和评估机制研究

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世界科技研究与发展 2024年第2期46卷 211-225页

作者：陈金辉郭利杰张丹夏令冯粲科学技术部高技术研究发展中心北京100044 清华大学公共管理学院北京100084 中材建设有限公司北京100176 矿冶科技集团有限公司北京100160 武汉理工大学资源与环境工程学院武汉430070

国家重点实验室是我国科技创新的重要平台,也是国家创新体系的组成部分,在推动学科发展、孕育重大科研成果、培育科技领军人才、承接重大项目和开展国际国内合作方面发挥了不可替代的重要作用。新形势下国家重点实验室在运行管理和评估... 详细信息

国家重点实验室是我国科技创新的重要平台,也是国家创新体系的组成部分,在推动学科发展、孕育重大科研成果、培育科技领军人才、承接重大项目和开展国际国内合作方面发挥了不可替代的重要作用。新形势下国家重点实验室在运行管理和评估考核方面的相关工作也需要适应发展和改革需求持续完善。本文以国家重点实验室为研究对象,系统研究分析其发展历程,详细论述了其管理和评估机制方面的方法与作用,并为新形势下国家重点实验室的管理评估机制完善提出了改进建议,以期为各类实验室的科学改革与长效运行发展提供参考。研究认为,国家重点实验室的评估工作应当强化定性与定量相结合机制,优化评估分组、专家遴选和评估指标体系,不断与时俱进,全面而客观地体现国家重点实验室的基本情况和科研水平,为国家战略部署和实验室创新发展提供导向和参考,使国家重点实验室充分发挥学科优势和科技创新中坚力量,在战略必争领域、前沿技术、“卡脖子”技术等方面实现突破和创新,推动中国在世界科技博弈的战场上占据主导地位。

关键词：国家重点实验室管理评估基础研究科技创新生态

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