检索结果-南通市图书馆

Ecological-Based Mining:A Coal-Water-Thermal Collaborative Paradigm in Ecologically Fragile Areas in Western China

Engineering 2024年第7期38卷 209-222页

作者： Xiaoxiu liu Yifan Zeng Qiang Wu Shihao Meng Jiyue Liang Zhuping Hou National Engineering Research Center of Coal Mine Water Hazard Controlling China University of Mining and TechnologyBeijing 100083China College of Geoscience and Surveying Engineering China University of Mining and TechnologyBeijing 100083China University of Mining and Technology(Beijing)Inner Mongolia Research institute Ordos 017000China

A substantial reduction in groundwater level,exacerbated by coal mining activities,is intensifying water scarcity in western China’s ecologically fragile coal mining ***’s national strategic goal of achieving a carbon peak and carbon neutrality has made eco-friendly mining that prioritizes the protection and efficient use of water resources *** on the resource characteristics of mine water and heat hazards,an intensive coal-water-thermal collaborative co-mining paradigm for the duration of the mining process is *** integrated system for the production,supply,and storage of mining companion resources is achieved through technologies such as roof water inrush prevention and control,hydrothermal quality improvement,and deep-injection geological *** active preventive and control system achieved by adjusting the mining technology and a passive system centered on multiobjective drainage and grouting treatment are suggested,in accordance with the original geological characteristics and dynamic process of water *** implementing advanced multi-objective drainage,specifically designed to address the“skylight-type”water inrush mode in the Yulin mining area of Shaanxi Province,a substantial reduction of 5.%in water drillings and inflow was achieved,leading to stabilized water conditions that effectively ensure subsequent safe coal *** integrated-energy complementary model that incorporates the clean production concept of heat utilization is also *** findings indicate a potential saving of 8419 t of standard coal by using water and air heat as an alternative heating source for the Xiaojihan coalmine,resulting in an impressive energy conservation of 5..2%and a notable 24.2%reduction in carbon *** ultra-deep sustained water injection of 100 m^(3)·h^(-1)in a single well would not rupture the formation or cause water leakage,and 7.87×10^(5.t of mine water could be effectively stored in the liujiagou Formation,presenti

关键词： Dual carbon targets Coal-water-thermal co-mining Ecologically fragile areas Mine-water control Resource utilization

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

大横路铜钴矿含矿地层的物源区属性和沉积环境:对钴富集的制约

引用

岩石学报 2024年第10期40卷 2988-3009页

作者：刘超辉王慧宁朱志勇田忠华孙逊北京科技大学土木与资源工程学院北京100083 中国地质科学院地质研究所北京100037 中国地质调查局广州海洋地质调查局广州511458

大横路铜钴矿床位于胶-辽-吉古元古代构造带北段,是我国目前探明的以钴为主的大型变沉积岩容矿型铜钴矿床。然而,关于该矿床的含矿地层物源属性及沉积时的氧化还原条件,以及二者与钴成矿之间的联系尚不清楚。本次研究以采自钻孔的贫Co和... 详细信息

大横路铜钴矿床位于胶-辽-吉古元古代构造带北段,是我国目前探明的以钴为主的大型变沉积岩容矿型铜钴矿床。然而,关于该矿床的含矿地层物源属性及沉积时的氧化还原条件,以及二者与钴成矿之间的联系尚不清楚。本次研究以采自钻孔的贫Co和富Co变碎屑岩以及老岭群地表出露的变质碎屑岩和碳酸盐岩作为研究对象,开展了详细的全岩地球化学以及C-O-S同位素研究,对比含矿与不含矿地层的物源属性、风化程度以及沉积时水体氧化还原环境的差异,进而探讨它们对Co(富Co硫化物)富集的制约。钻孔及地表的大栗子组变碎屑岩的地球化学特征表明含矿的大栗子组样品相对老岭群其他组样品更加富集Fe_(2)O_(3)^(T)和Sc且具有更低的Zr/Sc比值,这表明含矿地层中具有更多的镁铁质岩石来源的碎屑物质的输入。这与大栗子组中Hf含量小于8300×10^(-6)以及ε_(Hf)(t)值大于+2.3的碎屑锆石的比例更高是一致的。富Co的绢云千枚岩(变质页岩)相比贫Co样品具有更高的校正后化学蚀变指数CIA(大于83)、化学风化指数CIW(大于89)和斜长石蚀变指数PIA(大于85.,这表明前者的母岩区经历了较高程度的化学风化,导致了含矿岩石中具有更高的黏土矿物含量。此外,富Co样品显示了更低的Fe^(3+)/Fe^(2+)比值,表明了其形成于相对较为还原的沉积环境。综上所述,在大横路铜钴矿的赋矿岩石大栗子组绢云千枚岩的原岩沉积时,其更高的基性源区组份、母岩区较高的化学风化程度以及相对较为还原的沉积环境为Co的初始富集提供了有利条件。这一研究结果为深入探讨该类型矿床的成矿机制提供了重要依据。

关键词：胶-辽-吉古元古代构造带大横路铜钴矿地球化学物源属性成矿地质背景

来源：

维普期刊数据库博看期刊

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于5.kHz平面激光诱导荧光的射流火焰局部熄火时空特性分析

引用

光学精密工程 2024年第9期32卷 1307-1319页

作者：高龙彭江波于欣杨超博曹振袁勋刘文备哈尔滨工业大学航天学院光电子技术研究所黑龙江哈尔滨150006

基于高频光学测量手段研究射流火焰局部熄火的分布特性,对于分析燃烧场不稳定性机理有重要意义。建立5.kHz的平面激光诱导荧光测量系统,对高速射流火焰开展实验研究,并获得火焰结构的动态发展过程;将双边滤波、竖直滑窗局部自适应阈值... 详细信息

基于高频光学测量手段研究射流火焰局部熄火的分布特性,对于分析燃烧场不稳定性机理有重要意义。建立5.kHz的平面激光诱导荧光测量系统,对高速射流火焰开展实验研究,并获得火焰结构的动态发展过程;将双边滤波、竖直滑窗局部自适应阈值等图像处理方法引入平面激光诱导荧光图像的预处理,在局部断裂结构数量特征的基础上,提取局部断裂结构长度和空间位置等特征;基于上述特征深入解析局部熄火的时空分布特性,进一步完善高频平面激光诱导荧光诊断与分析方法。研究表明:双边滤波算法处理后,图像峰值信噪比为34.3 dB,结构相似度为0.93,噪声水平显著降低,获得了较好的去噪效果;使用竖直滑窗局部自适应方法进行图像分割的F1分数达到93.30%;断裂结构累计数量随时间线性增加,当射流马赫数由0.5.至1.6时,单侧图像断裂结构的每秒累计数量从790.7增至9 217.2,并且局部熄火频率与射流马赫数呈指数关系;断裂结构主要分布区域为火焰臂及上侧中央燃料区。本研究进一步拓展了高频平面激光诱导荧光技术的应用能力,证明了高频平面激光诱导荧光技术用于局部熄火时空分布特性研究的可行性。

关键词：激光诱导荧光光谱诊断高速射流火焰 OH基局部熄火图像特征

来源：

维普期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Integrated approach of predicting rock stability in high mountain valley underground caverns

引用

Underground Space 2024年第6期19卷 317-341页

作者： Fuyuan Tan Haosen Guo Pengzhi Pan Zhaofeng Wang Xufeng liu Yangyi Zhou East China Jiaotong University Nanchang 467200China State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan 430071China Key Laboratory of Liaoning Province on Deep Engineering and Intelligent Technology Northeastern UniversityShenyang 110819China University of chinese academy of Sciences Beijing 100049China

High mountain valleys are characterized by the development of intricate ground stress fields due to geological processes such as tectonic stress,river erosion,and rock *** processes introduce considerable stability concerns in the surrounding rock formations for underground engineering projects in these regions,highlighting the imperative need for rigorous stability assessments during the design phase to ensure construction *** paper introduces an innovative approach for the pre-evaluation of the stability of surrounding rocks in underground caverns situated within high mountain *** methodology comprises several pivotal ***,we conduct inverse calculations of the ground stress field in complex geological terrains,combining field monitoring and numerical ***,we ascertain stress-strength ratios of the surrounding rocks using various rock strength *** assess the stability characteristics of the surrounding rocks in the 1^(#)spillway cave within our project area,we employ numerical simulations to compute stress-strength ratios based on different rock strength ***,we undertake a comparative analysis,utilizing data from the 5.(#)Underground Laboratory(Lab 5.of Jinping II Hydropower Station,aligning the chosen rock strength criterion with the damage characteristics of Lab 5.s surrounding *** analysis serves as the cornerstone for evaluating other mechanical responses of the surrounding rocks,thereby validating the pre-evaluation *** pre-evaluation method takes into account the intricate geological evolution processes specific to high mountain *** also considers the influence of the initial geostress field within the geological range of underground *** comprehensive approach provides a robust foundation for the analysis and assessment of the stability of surrounding rocks,especially in high mountain valley areas,during the design phase of underground engi

关键词： High mountain valley Underground cavern Stability of surrounding rock On-site monitoring Stress-strength ratio Numerical simulation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

支架固定馆藏人物俑文物的抗震优化设计研究

引用

振动与冲击 2024年第5期43卷 110-120页

作者：王萌施勋杨维国葛家琪马伯涛张曼生刘佩北京交通大学土木建筑工程学院北京100044 结构风工程与城市风环境北京市重点实验室北京100044 中国航空规划设计研究总院有限公司北京100120 中船第九设计研究院工程有限公司上海200063

为优化支架固定馆藏人物俑文物的抗震效果,选取不同尺寸和体态的典型地震易损人物俑文物复制品(武士俑和唐三彩人物俑),开展文物复制品-优化组合措施(支架和卡固件)抗震系统振动台试验,获得影响文物复制品运动状态的关键优化参数、文物... 详细信息

为优化支架固定馆藏人物俑文物的抗震效果,选取不同尺寸和体态的典型地震易损人物俑文物复制品(武士俑和唐三彩人物俑),开展文物复制品-优化组合措施(支架和卡固件)抗震系统振动台试验,获得影响文物复制品运动状态的关键优化参数、文物复制品与支架相互作用规律,并检验组合措施对较大体积人物俑文物的抗震固定效果。建立文物复制品-组合措施相互作用系统数值分析模型,通过参数分析,获得支架与文物间安装缝隙、在安装缝隙内填充不同种类隔震垫对文物动力响应的影响、文物复制品与固定措施相互作用规律及采用独立支架/组合措施有效固定人物俑的最小支架尺寸,为兼顾安全性及最小干预原则的固定措施优化设计提供必要依据。结果表明:相比独立支架,组合措施能够有效降低人物俑文物动力响应,有效提高固定效果;为保证人物俑文物安全,建议支架与文物间安装缝隙不大于5.mm;在缝隙中填充橡胶垫及硅胶垫可使文物与支架间相互作用力降低5.%~75.,有效防止文物局部损伤;当人物俑文物体型超过一定限值,独立支架不再适用,建议选择支架和随形卡固件组合措施。

关键词：馆藏人物俑文物抗震固定效果振动台试验优化设计组合措施

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Geochemical characteristics of the independent cadmium deposit, Niujiaotang, Duyun, Guizhou

引用

chinese Science Bulletin 1999年第S2期44卷 61-63页

作者： liu Tiegeng~1, YE Lin~1 and CHEN Guoyong~2 1. institute of Geochemistry, chinese academy of Sciences, Guiyang 5.0002, China 2. Team No. 104, Bureau of geology and Mineral Resources, Duyun, Guizhou 5.8000, China institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China Team No. 104 Bureau of Geology and Mineral Resources Duyun Guizhou 558000 China

A large independent cadmium deposit has been found at Niujiaotang, Duyun, in recent years. To the bestof our knowledge this represents the first case of its kind in the world. With a reserve of over 5.000 tonsof cadmium, the deposit is unique in its high concentrations of cadmium which are tens of to over onehundred times higher than in ordinary cadmium mineralizations associated with Pb-Zn deposits. 1 geological characteristics The Niujiaotang deposit is located at the southwest margin of the Yangtze Plate. The region consistsof a thick sedimentary cover ranging from Sinian to Triassic in age overlying unconformably the basementof Mid-Proterozoic metamorphosed volcanic-sedimentary rocks. Lower Cambrian carbonate strata arcoutcropped in the mining district. Cadmium mineralizations, with seven layers recognizable, are devel-

关键词： independent cadmium deposit mode of occurrence of cadmium inclusion fluid feature stable isotope geochemistry.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Pan-African metamorphism and magmatism in the Prydz Belt,East Antarctica:a geochronological perspective

引用

Advances in Polar Science 2024年第2期35卷 143-156页

作者： BAO Hong WANG Wei-(RZ) liu Xinshu ZHAO Yue GONG Tingnan liu Xiaochun CUI Ying TIAN Zuolin institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China Key Laboratory of Paleomagnetism and Tectonic Reconstruction Ministry of Natural ResourcesBeijing 100081China China University of Geosciences(Beijing) Beijing 100081China MOE Key Laboratory of Orogenic Belt and Crustal Evolution School of Earth and Space SciencesPeking UniversityBeijing 100871China institute of geology Chinese Academy of Geological SciencesBeijing 100037China

The Prydz Belt in East Antarctica underwent extensive reworking during the late Neoprotertozoic–early Paleozoic Pan-African orogeny,which is characterized by granulite facies,clockwise P–T paths,and high dT/dP *** study compiles the existing age and composition data of zircon and monazite from metamorphic rocks and links their key characteristics to the metamorphic evolution of the Prydz *** frequency of zircon U–Pb ages starts to increase noticeably from~5.5.Ma,peaking between 5.0 Ma and 5.0 Ma,followed by a dramatic decline after 5.0 *** Th/U values(>0.1)of zircon are observed from~5.5.Ma,displaying a noticeable increasing trend in Th/U values before a rapid decline from~5.0 *** frequency of monazite ages progressively increases from~5.0 Ma,reaching its peak at 5.5.Ma,and then rapidly decreases after 490 *** with the crystallization behaviors of zircon and monazite,this study suggests that the systematic changes in Th/U values of zircon after 5.5.Ma indicate a transition in the thermal regime of the Prydz Belt towards the cooling *** growth of zircon and monazite corresponds to the post-peak cooling process,while the crystallization peak of monazite lags behind that of zircon by~5.15.Ma,which indicates a relatively low cooling *** the granitic intrusions accompanied the entire metamorphic evolution,the majority of them are younger than 5.0 *** results suggest that the Pan-African event likely peaked at~5.5.5.5.Ma and gradually cooled to near-solidus conditions at~5.0–5.0 Ma,with a relatively slow average cooling process.

关键词： East Antarctica Prydz Belt Pan-African orogeny zircon monazite U–Pb dating

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

二烯丙基二硫增强DJ-1过表达人胃癌SGC7901细胞对5.FU的敏感性

引用

中国药理学通报 2024年第1期40卷 99-105页

作者：寻艺夏红李志敏刘芳苏琦苏波南华大学衡阳医学院肿瘤研究所湖南省高校肿瘤细胞与分子病理学重点实验室湖南省胃癌防治研究中心南华大学附属第一医院肿瘤科南华大学衡阳医学院药学院药物药理研究所湖南衡阳421001

目的探讨二烯丙基二硫(diallyl disulfide, DADS)是否增强DJ-1(protein/nucleic acid deglycase,蛋白/核酸去糖化酶)过表达人胃癌SGC7901细胞对5.FU(5.fluorouracil, 5.氟尿嘧啶)的敏感性。方法实验分为Control组、DADS组、VCR(Vincristine,长春新碱)组、VCR+DADS组、DJ-1组、DJ-1+DADS组;MTT检测DADS对5.FU抑制细胞增殖的影响;流式细胞术检测DADS对细胞凋亡的影响;qRT-PCR、Western blot、免疫荧光检测DADS对耐药相关基因表达的影响。结果 DADS增强5.FU对VCR耐药细胞和DJ-1过表达细胞增殖的抑制作用;DADS诱导VCR耐药细胞凋亡;DADS下调DJ-1表达、诱导DJ-1过表达细胞凋亡;过表达DJ-1上调P-糖蛋白(P-glycoprotein, P-gp)、Bcl-2、XIAP(X连锁凋亡抑制蛋白),下调caspase-3表达;DADS降低DJ-1过表达细胞和VCR耐药细胞P-gp、Bcl-2、XIAP,升高caspase-3表达。结论 DADS能增强DJ-1过表达细胞对5.FU的敏感性,与其拮抗DJ-1介导的P-gp、Bcl-2、XIAP上调、caspase-3下调有关。

关键词：二烯丙基二硫 DJ-1 P-糖蛋白胃癌细胞耐药 5.氟尿嘧啶

来源：

维普期刊数据库博看期刊

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

刚果(金)地区超大型铜钴矿资源选冶工艺研究与实践

引用

现代矿业 2024年第2期40卷 162-166页

作者：余浔刘瑜中国瑞林工程技术股份有限公司江西省南昌市330031 长沙矿冶研究院有限责任公司湖南金磨科技有限责任公司

非洲铜钴矿床主要分布于赞比亚—刚果(金)铜矿带,具有储量大、品位高、矿石性质复杂等特点,这些铜钴矿石按氧化程度与脉石矿物的特性差异,可分为原生硫化铜钴矿石、低钙混合铜钴矿石、高钙混合铜钴矿石、低钙氧化铜钴矿石和高钙氧化铜... 详细信息

非洲铜钴矿床主要分布于赞比亚—刚果(金)铜矿带,具有储量大、品位高、矿石性质复杂等特点,这些铜钴矿石按氧化程度与脉石矿物的特性差异,可分为原生硫化铜钴矿石、低钙混合铜钴矿石、高钙混合铜钴矿石、低钙氧化铜钴矿石和高钙氧化铜钴矿石,指出应根据矿石氧化率、脉石矿物的类型(对于碱性脉石矿物必须关注Ca、Mg含量)、矿石中铜钴矿物的赋存状态、金属回收率及加工成本等因素确定其开发利用工艺,并列举了这5.代表性矿石的生产工艺及生产指标。概括说,除低钙氧化铜钴矿石宜采用直接浸出工艺外,其余各类矿石均宜采用选冶联合工艺,但浮选工艺各有特色。研究与生产实践表明,针对不同性质的矿石选用不同的选冶工艺,是获得理想分选指标的关键。

关键词：硫化铜钴矿混合铜钴矿氧化铜钴矿直接浸出选冶联合工艺

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effects of acid-rock reaction on physical properties during CO_(2)-rich industrial waste gas(CO_(2)-rich IWG)injection in shale reservoirs

引用

Petroleum Science 2024年第1期21卷 272-285页

作者： Yi-Fan Wang Jing Wang Hui-Qing liu Xiao-Cong Lv Ze-Min Ji National Key Laboratory of Petroleum Resources and Engineering China University of PetroleumBeijing102249China MOE Key Laboratory of Petroleum Engineering China University of PetroleumBeijing102249China Research institute of Exploration and Development PetroChinaBeijing100083China

"Carbon peaking and carbon neutrality"is an essential national strategy,and the geological storage and utilization of CO_(2)is a hot issue ***,due to the scarcity of pure CO_(2)gas sources in China and the high cost of CO_(2)capture,CO_(2)-rich industrial waste gas(CO_(2)-rich IWG)is gradually emerging into the public's ***_(2)has good adsorption properties on shale surfaces,but acidic gases can react with shale,so the mechanism of the CO_(2)-rich IWG-water-shale reaction and the change in reservoir properties will determine the stability of geological ***,based on the mineral composition of the Longmaxi Formation shale,this study constructs a thermodynamic equilibrium model of water-rock reactions and simulates the regularity of reactions between CO_(2)-rich IWG and shale *** results indicate that CO_(2)consumed 12%after reaction,and impurity gases in the CO_(2)-rich IWG can be dissolved entirely,thus demonstrating the feasibility of treating IWG through water-rock *** IWG inhibits the dissolution of CO_(2),the optimal composition of CO_(2)-rich IWG is 95.CO_(2)and 5.IWG when CO_(2)geological storage is the main *** contrast,when the main goal is the geological storage of total CO_(2)-rich IWG or impurity gas,the optimal CO_(2)-rich IWG composition is 5.%CO_(2)and 5.%*** the CO_(2)-rich IWG-water-shale reaction,temperature has less influence on the water-rock reaction,while pressure is the most important ***2 has the greatest impact on water-rock reaction in *** minerals,clay minerals such as illite and montmorillonite had a significant effect on water-rock *** overall reaction is dominated by precipitation and the volume of the rock skeleton has increased by 0.74 cm3,resulting in a decrease in shale porosity,which enhances the stability of CO_(2)geological storage to some *** the reaction between CO_(2)-rich IWG-water-shale at simulated temperatures and pressures,precipitation

关键词： CO_(2)-rich industrial waste gas geological storage Acid-rock reaction Shale Geochemical modelling

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：