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Disturbance failure mechanism of highly stressed rock in deep excavation:Current status and prospects

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International Journal of Minerals,Metallurgy and Materials 2024年第4期31卷 611-627页

作者： Tao Wang Weiwei ye liyuan Liu Kai Liu Naisheng Jiang Xianhui Feng School of Civil and Resources Engineering University of Science and Technology BeijingBeijing 100083China Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mines University of Science and Technology BeijingBeijing 100083China Department of Engineering Science University of OxfordParks RoadOxford OX13PJUK School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China

This article reviews the current status on the dynamic behavior of highly stressed rocks under ***,the experimental apparatus,methods,and theories related to the disturbance dynamics of deep,high-stress rock are reviewed,followed by the introduction of scholars’research on deep rock deformation and failure from an energy ***,with a backdrop of highstress phenomena in deep hard rock,such as rock bursts and core disking,we delve into the current state of research on rock microstructure analysis and residual stresses from the perspective of studying the energy storage mechanisms in ***,the current state of research on the mechanical response and the energy dissipation of highly stressed rock formations is briefly ***,the insufficient aspects in the current research on the disturbance and failure mechanisms in deep,highly stressed rock formations are summarized,and prospects for future research are *** work provides new avenues for the research on the mechanical response and damage-fracture mechanisms of rocks under high-stress conditions.

关键词： deep rock with high stress highly stressed rock rock failure residual stress energy release

Electrochemical Fabrication of Pd-Ag Alloy Nanowire Arrays in Anodic Alumina Oxide Template

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Journal of Materials Science & Technology 2008年第6期24卷 850-856页

作者： Erhong YUE Gang YU Yuejun OUYANG Baicheng WENG Weiwei SI liyuan ye State Key Laboratory of Chemo/Biosensing and Chemometrics Hunan University Changsha 410082 China Department of Chemistry and Chemical Engineering Huaihua College Huaihua 418008 China

The synthesis of Pd-Ag alloy nanowires in nanopores of porous anodic aluminum oxide （AAO） template by electrochemical deposition technique was reported. Pd-Ag alloy nanowires with 16%-25% Ag content are expected to serve as candidates of useful nanomaterials for the hydrogen sensors. Scanning electron microscopy （SEM） and energy dispersed X-ray spectroscopy （EDX） were employed to characterize the morphologies and compositions of the Pd-Ag nanowires. X-ray diffraction （XRD） was used to characterize the phase properties of the Pd-Ag nanowires. Pd-Ag alloy nanowire arrays with 17.28%-23.76% Ag content have been successfully fabricated by applying potentials ranging from -0.8 to -1.0 V （vs SCE）. The sizes of the alloy nanowires are in agreement with the diameter of AAO nanopores. The underpotential deposition of Ag＋ on Pd and Au plays an important role in producing an exceptionally high Ag content in the alloy. Alloy compositions can still be controlled by adjusting the ion concentration ratio of Pd^2＋ and Ag＋ and the electrodeposition processes. XRD shows that nanowires obtained are in the form of alloy of Pd and Ag.

关键词： Pd-Ag Alloy nanowires Anodic aluminum oxide template Electrodeposition

Nanosize-effect on the distribution of heavy metals in copper smelting dust:Based on sophisticated dust sorting approach

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Nano Research 2024年第1期17卷 312-320页

作者： Ken Li Zuwu Liao Hengdi ye Qingzhu Li Fenghua Shen Qian Li Hui Liu Qingwei Wang Xu Yan Zhang Lin liyuan Chai School of Metallurgy and Environment Central South UniversityChangsha 410083China Chinese National Engineering Research Center for Control&Treatment of Heavy Metal Pollution Changsha 410083China National Engineering Research Center of Sintering and Pelletizing Equipment System Zhongye Changtian International Engineering Co.LtdChangsha 410205China

Dust particles emitted from smelters can be hazardous to ecosystems and humans,as they are often enriched in metallic ***,we combined multi-method mineralogical analysis with a sophisticated size sorting approach for copper smelting dust to study the nanosize-effect on heavy metal distribution,which has hitherto been *** types of dust were collected from a copper flash smelter and then size-sorted using a Dekati low-pressure *** showed that all three samples could easily sort out nanoscale dust particles(<1μm,grades 10–2)and even those smaller than 100 nm(grades 5–2).Especially for electrostatic precipitators dust,the mass fraction of nanoscale dust(<1μm)could reach 10.71%.The presence of heavy metals(Pb,Zn,Cu,and As)and their mineral species in dust was examined at various particle *** was discovered that different heavy metals are enriched on nanoparticles in specific *** micron-sized particles,heavy metals are generally found in discrete phases(e.g.,CuSO_(4),PbSO_(4),and As_(2)O_(3)).In nanoscale particles,the dominant phase is Fe_(3)O_(4),while heavy metals are mostly found in lattice substitution(e.g.,CuFe_(2)O_(4)and ZnFe_(2)O_(4)).Two distinct nano-dust morphologies were found:One with irregular mesh or chain structures consisting of particles of a few nanometers,and the other with polygonal crystals in larger sizes of hundreds of *** enrichment of heavy metals in the latter morphology is more pronounced,possibly because lattice substitution of heavy metals is more likely to occur when polycrystalline particles are formed.

关键词： copper flue dust size-sorted heavy metal distribution morphology nano-sized effects

Research and Application of Anti-Collapse Lubricant Compound Polyalcohol for Water-Based Drilling Fluid

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Open Journal of Yangtze Oil and Gas 2022年第1期7卷 1-12页

作者： Chujun Zhang Chunzhi Luo liyuan ye Huan Zhang Huan Xiang College of Chemistry and Environmental Engineering Yangtze University Jingzhou China

Polyalcohol is an environmentally friendly anti-collapse lubricant commonly used in water-based drilling fluids. It is generally composed of the single polyether or polyol, but its lubricity and anti-collapse inhibition can’t satisfy the application of current water-based drilling fluid systems well. Consequently, the laboratory has carried out research on the anti-collapse lubricant compound polyalcohol. The anti-collapse lubricant samples are mixed with lauryl polyether, nonylphenol polyether and Tween 80 according to different proportions. The cloud point, the reduction rate of lubrication coefficient and linear expansion are measured, and the change they caused should be observed. Then, the optimal ratio is optimized through orthogonal experiments. The results show that the increase in the content of the three kinds of polyethers respectively enhances the inhibition. When the content of lauryl polyether increases, the cloud point of the anti-collapse lubricant declines and the reduction rate of lubrication coefficient rises;when the content of nonylphenol polyether increases, the cloud point declines, but it has little effect on the reduction rate of the lubrication coefficient;when the content of Tween 80 increases, the cloud point rises, and the reduction rate of the lubrication coefficient first augments and then basically remains unchanged. The best mass ratio of lauryl polyether:TW-80:nonylphenol polyether is 6:3:4.

关键词： Polyalcohol Lubricity Inhibition Lauryl Polyether Nonylphenol Polyether Tween 80 Cloud Point

Epidemiology of pancreatic cancer:New version,new vision

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Chinese Journal of Cancer Research 2023年第5期35卷 438-450页

作者： Wenhao Luo Jun Wang Hao Chen liyuan ye Jiangdong Qiu Yueze Liu Ruobing Wang Guihu Weng Tao Liu Dan Su Jinxin Tao Chen Ding Lei You Taiping Zhang Department of General Surgery Peking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China

Pancreatic cancer(PC)is a devastating malignancy with an extremely high mortality rate and poses significant challenges to healthcare systems *** prevalence of PC risk factors spiked over the years,leading to a global increase in PC incidence *** contribution of different risk factors,however,varied from region to region due to genetic predisposition,environmental,social,and political factors underlying disease prevalence in addition to public health *** comprehensive review aims to provide a thorough analysis of the epidemiology of PC,discussing its incidence,risk factors,screening strategies and socioeconomic *** compiled a wide range of seminal studies as well as epidemiological investigations to serve this review as a comprehensive guide for researchers,healthcare professionals,and policymakers keen for a more profound understanding of PC *** review highlights the essentiality of persistent research efforts,interdisciplinary collaboration,and public health initiatives to address the expanding burden of this malignancy.

关键词： Pancreatic cancer novel data epidemiology risk factors future direction

A 256 Gb/s electronic−photonic monolithically integrated transceiver in 45 nm CMOS

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Journal of Semiconductors 2024年第7期45卷 7-10页

作者： Ang Li Qianli Ma Yujun Xie Yongliang Xiong Yingjie Ma Han Liu ye Jin Menghan Yang Guike Li Haoran Yin Minye Zhu Yang Qu Peng Wang Daofa Wang Wei Li liyuan Liu Nan Qi Ming Li Key Laboratory of Optoelectronic Materials and Devices Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Institute of Semiconductors Chinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100190China School of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China

With the explosive development of artificial intelligence(AI),machine learning(ML),and high-performance comput-ing(HPC),the ever-growing data movement is asking for high density interconnects with higher bandwidth(BW),lower power and lower latency[1−3].The optical I/O leverages silicon photonic(SiPh)technology to enable high-density large-scale integrated photonics.

关键词： Gb/s transceiver monolithic

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冲压件质量保障方案策划

模具制造 2022年第7期22卷 13-18页

作者：魏本华叶立渊北汽重型汽车有限公司江苏常州213000

我公司是新建的商用车企业,在开展冲压件质量策划方面,借鉴了知名的商用车和乘用车企业的经验,结合自身实际,经过周密策划,确定了冲压件质量的控制要素、目标、组织,制定运营过程控制方案并提出了质量预防和改进的思路。

关键词：冲压件质量控制要素

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高性能油基钻井液在红页2井的应用

山东化工 2022年第17期51卷 139-141页

作者：周博秦波波叶礼圆荆州市学成实业有限公司湖北荆州434000

红页2井是红星区块的一口页岩气预探井,由于地质构造以及页岩的特性导致该地水平段钻进易跨、易漏、易喷、摩阻大等特点,为此笔者研究出一套高性能油基钻井液体,该体系具有破乳电压高、流变性好、高温高压滤失量小、泥饼质量好、封堵性... 详细信息

红页2井是红星区块的一口页岩气预探井,由于地质构造以及页岩的特性导致该地水平段钻进易跨、易漏、易喷、摩阻大等特点,为此笔者研究出一套高性能油基钻井液体,该体系具有破乳电压高、流变性好、高温高压滤失量小、泥饼质量好、封堵性强、稳定好等特点。该体系在红页2井成功应用,创造了红星区块井深最深、水平段最长、机械钻速最快等三项纪录,且完井后其起钻摩阻最大仅16 t,体现出了该体系的优异性能,也为该地区后续钻进提供了技术参考。

关键词：油基钻井液破乳电压流变性滤失量封堵性

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高密度白油基钻井液体系的研究及应用

石油化工应用 2022年第10期41卷 46-49,54页

作者：秦波波周博叶礼圆陈姜荆州市学成实业有限公司湖北荆州434000

四川泸县地区由于页岩气储层深、地层压力大、井底温度高、环保要求严,所以对钻井液的要求很高,基于现场要求研发出一套高密度白油基钻井液体系。该体系具有破乳电压高、滤失量小、流变性好的特点。不仅具有良好的低温流动性,而且在高... 详细信息

四川泸县地区由于页岩气储层深、地层压力大、井底温度高、环保要求严,所以对钻井液的要求很高,基于现场要求研发出一套高密度白油基钻井液体系。该体系具有破乳电压高、滤失量小、流变性好的特点。不仅具有良好的低温流动性,而且在高温下也具有良好的悬浮稳定性和携岩能力,150℃具有良好的高温稳定性和沉降稳定性。该体系在泸203H57平台成功应用,在井眼清洁、井壁稳定方面体现出了优良的性能,为该地区白油基钻井液的应用打下坚实的技术基础。

关键词：高密度白油基钻井液井壁稳定水平井