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Acta Geologica Sinica(English Edition) 2016年第S1期90卷 253-页

作者： ZHANG Pengfei Ibrahim UYSAL ZHOU Meifu SU Benxun erdi avci Department of Earth Sciences the University of Hong Kong Department of Geological Engineering Karadeniz Technical University State Key Laboratory of Lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences

The Kop ophiolite in NE Turkey,representing a forearc fragment of Neo-Tethys ocean,mainly consists of a paleoMoho transition zone(MTZ)and a harzburgitic upper mantle *** Kop MTZ locally contains cumulate

关键词： NE Turkey high REE Subduction Initiation for the Formation of High-Cr Chromitites in the Kop Ophiolite Cr

Iron Isotopic Fractionation and Origin of Chromitites in the Paleo-Moho Transition Zone of the Kop Ophiolite, NE Turkey

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Acta Geologica Sinica(English Edition) 2017年第S1期91卷 53-页

作者： ZHAGN Pengfei ZHOU Meifu SU Benxun Ibrahim UYSAL Paul T.ROBINSON erdi avci HE Yongsheng Department of Earth Science The University of Hong Kong State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of Sciences Department of Geological Engineering Karadeniz Technical University State Key Laboratory of Geological Processes and Mineral Resources School of Earth Sciences and Mineral ResourcesChina University of Geosciences

The Kop ophiolite in NE Turkey is a fragment of Neo-Tethyan *** can be mainly divided into a paleo-Moho transition zone(MTZ)in the North and a harzburgitic mantle sequence in the *** are predominant in the MTZ of the Kop ophiolite,and they are locally interlayered with chromitites and enclose minor bodies of harzburgites near the petrological Moho *** Fe isotopic variations were observed for magnesiochromite(-0.14‰to 0.06‰)and olivine(-0.12‰to 0.14‰)from the MTZ chromitites,dunites and *** individual dunite samples,magnesiochromite usually has lighter Fe isotopic compositions than olivine,which was probably caused by subsolidus Mg-Fe exchange between the two mineral *** magnesiochromite and olivine display an increasing trend ofδ56Fe along a profile from chromitite *** trend reflects continuous fractional crystallization in a magma chamber,which resulted in heavier Fe isotopes concentrated in the evolved *** each cumulative cycle of chromitite and dunite,dunite was formed from relatively evolved melts after massive precipitation of *** of more primitive and evolved melts in the magma chamber was a potential mechanism for triggering the crystallization of magnesiochromite,generating chromitite layers in the cumulate *** mixing happened,the primitive melts had reacted with mantle harzburgites during their ascendance;whereas the evolved melts may lie on the olivine-chromite cotectic near the liquidus field of *** degrees of magma mixing and differentiation are expected to generate melts with differentδ56Fe values,accounting for the Fe isotopic variations of the Kop MTZ.

关键词： MTZ Iron Isotopic Fractionation and Origin of Chromitites in the Paleo-Moho Transition Zone of the Kop Ophiolite NE Turkey Fe

静水压环境下岩石动态压剪耦合力学响应与本构模型

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工程科学与技术 2024年第2期56卷 186-195页

作者：杜洪波王鑫婷魏明东阿比尔的王浩然重庆交通大学国家内河航道整治工程技术研究中心重庆400074 重庆交通大学水利水运工程教育部重点实验室重庆400074 四川大学山区河流保护与治理全国重点实验室四川成都610065

静水压环境是深部岩石的典型应力赋存状态,并且岩石内存在多尺度的结构面,易遭受压剪耦合的复杂动力扰动。因此,探究静水压环境下岩石动态压剪耦合力学响应及损伤本构模型对于深部岩石结构安全评估和动力灾害防控极为重要。本文应用霍... 详细信息

静水压环境是深部岩石的典型应力赋存状态,并且岩石内存在多尺度的结构面,易遭受压剪耦合的复杂动力扰动。因此,探究静水压环境下岩石动态压剪耦合力学响应及损伤本构模型对于深部岩石结构安全评估和动力灾害防控极为重要。本文应用霍普金森压杆试验装置,对倾斜砂岩试样进行动态压剪耦合试验,揭示静水围压、动态荷载压剪耦合比及加载率对岩石力学特性的影响规律;基于Drucker–Prager准则和Weibull分布,建立静水压环境下深部岩石动态压剪耦合损伤本构模型。结果表明:1)岩石动态强度及变形模量随着加载率及静水围压的增大呈增加趋势,强度的围压效应及加载率效应明显,动态荷载中的剪切分量能削减岩石承载能力并提升岩石的变形能力。2)随着动态荷载剪压比和静水围压的增加,岩石冲击破坏模式由拉伸主导的内部锥形破裂面及表面劈裂转变为剪切主导的单一平面破坏;动态荷载中的剪切分量对静水围压作用下岩石的动态破碎存在明显的限制作用。3)采用极值解析法推导了模型分布参数F0和m的解析表达式,探究了模型分布参数F0、m和损伤修正系数q的物理意义及其对本构模型的影响规律;同时,对比不同工况下试验和理论应力应变曲线,验证了该模型的合理性。本文揭示的静水压环境下岩石动态压剪耦合动力响应与建立的损伤本构模型,可为复杂动力扰动下深部岩石工程安全建设与灾害防护提供理论支撑。

关键词：深部岩石静水围压霍普金森压杆动态压剪耦合动力响应损伤本构模型

高频破碎锤冲击作用下礁石损伤特性及影响规律

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水运工程 2024年第7期 239-245页

作者：潘剑蒋国兴韩亚峰阿比尔的广西平陆运河建设有限公司广西南宁530000 重庆交通大学河海学院重庆400074

为研究长江航道环境敏感区高频破碎锤水下破礁特征,采用理论分析和数值模拟方法,分析高频破碎锤冲击作用下礁石的损伤特性及影响规律。结果表明,冲击钎杆周边岩体以剪切破坏为主,远离钎杆处岩体则以拉破坏为主。凿入深度、破碎深度及破... 详细信息

为研究长江航道环境敏感区高频破碎锤水下破礁特征,采用理论分析和数值模拟方法,分析高频破碎锤冲击作用下礁石的损伤特性及影响规律。结果表明,冲击钎杆周边岩体以剪切破坏为主,远离钎杆处岩体则以拉破坏为主。凿入深度、破碎深度及破碎宽度随工作压力与冲击频率的增大而增大,随礁石强度的增大而减小,高频破碎锤不宜破碎强度太高的礁石;大于临界冲击频率时,破碎参数改善不显著。工作压力是影响高频破碎锤破礁效果的主控因素,其次是冲击频率,最后是礁石强度。建立了钎杆凿入深度与岩体破碎体积的数学关系,提出了高频破碎锤破礁工效计算方法。研究成果对优化高频破碎锤破礁参数、提高破礁效率具有参考价值。

关键词：环境敏感区清礁高频破碎锤礁石损伤特性影响规律

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基于芳香中药探讨芳香疗法在偏头痛中的应用

香料香精化妆品 2024年第4期 32-37页

作者：汪耳迪李霞伍睿昕张洁上海中医药大学附属市中医医院上海200071

偏头痛是一种常见的原发性头痛疾病,严重影响了人们的生活质量,加重了社会经济负担。但目前的治疗方法并不理想,存在药物不良反应、耐受性差等问题。芳香疗法是一种利用植物精油的气味来调节身心状态的替代疗法,在治疗偏头痛方面具有一... 详细信息

偏头痛是一种常见的原发性头痛疾病,严重影响了人们的生活质量,加重了社会经济负担。但目前的治疗方法并不理想,存在药物不良反应、耐受性差等问题。芳香疗法是一种利用植物精油的气味来调节身心状态的替代疗法,在治疗偏头痛方面具有一定的作用和优势。综述了芳香疗法的基本原理及在偏头痛中的作用机制,介绍了几种常见中药芳香精油在偏头痛中的应用效果,同时将芳香疗法与其他非药物疗法联合应用,以期为偏头痛患者寻求一种创伤小、疗效好的辅助疗法,使其在临床实践中推广应用。

关键词：芳香中药芳香疗法精油偏头痛

项目制与课程制融合教学模式研究——以“工程地质及水文地质勘察”课程为例

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科教文汇 2024年第11期 81-84页

作者：周鑫沈娜何晓英李东谢涛阿比尔的重庆交通大学河海学院重庆400074

随着时代快速发展,社会各行业迫切需要具备守正创新、团队协作等方面能力的复合型人才。高校作为人才培养的摇篮,仅采用传统课程制教学模式所培养的学生已难以满足行业对人才的需求,为此,文章提出一种项目制与课程制融合的教学模式,通... 详细信息

随着时代快速发展,社会各行业迫切需要具备守正创新、团队协作等方面能力的复合型人才。高校作为人才培养的摇篮,仅采用传统课程制教学模式所培养的学生已难以满足行业对人才的需求,为此,文章提出一种项目制与课程制融合的教学模式,通过分析项目制教学模式的特点,结合两种教学模式的优点,从一门课程的视角构建了融合教学模式的实施方案,使两种教学模式在教学实施过程中有机融合。对融合教学模式的论证表明,该模式在传统课程教学基础上,可锻炼学生自主学习、团队协作、独立创新等方面的能力,更好地服务重庆交通大学复合型人才培养。

关键词：教学模式研究课程制教学项目制教学复合型人才培养

Effects of anti-pull ties on the bearing behaviors of shallow tunnel-type anchorages in soft rock

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Journal of Mountain Science 2023年第9期20卷 2708-2730页

作者： HAN Ya-feng LIU Xin-rong ABI erdi TU Yi-liang XU Bin ZHOU Xiao-han DENG Zhi-yun WANG Zhong-hao School of River and Ocean Engineering Chongqing Jiaotong UniversityChongqing 400074China School of Civil Engineering Chongqing UniversityChongqing 400045China National Joint Engineering Research Center of Geohazards Prevention in The Reservoir Areas(Chongqing) Chongqing 400045China State Key Laboratory of Mountain Bridge and Tunnel Engineering Chongqing Jiaotong UniversityChongqing 400074China Department of Hydraulic Engineering Tsinghua UniversityBeijing 100084China Chongqing Branch of Yangtze River Scientific Research Institute Chongqing 400026China

Tunnel-type anchorages(TTAs)installed in human gathering areas are characterized by a shallow burial depth,and in many instances,they utilize soft rock as the bearing ***,the stability control measures and the principle of shallow TTAs in soft rock have not been fully ***,a structure suitable for improving the stability of shallow TTAs in soft rock strata,named the anti-pull tie(APT),was added to the floor of the back *** tests and numerical models were established to study the influence of the APT on the load transfer of TTAs,the mechanical response of the surrounding rock,the stress distribution of the interface,and the failure *** mechanical characteristics of APTs were also *** results show that the ultimate bearing capacity of TTAs with an APT is increased by approximately 11.8%,as compared to the TTAs without an ***,the bearing capacity of TTAs increases approximately linearly with increasing height,width,length,and quantity of APTs,and decreases approximately linearly with increasing distance from the back face and slope angle of the tie *** normal squeezing between the tie slope and the surrounding rock increases the shear resistance of the interface and expands the range of the surrounding rock participating in bearing *** tension and compression zones exist in the APT during *** tension zone extends from the tie toe to the tie bottom along the tie *** range of the tie body tension zone constantly expands to the deep part of the APT with an increasing *** peak tensile stress value is located at the tie *** distribution of compressive stress in the tie body is the largest at the tie top,followed by the tie slope,and then the tie bottom.

关键词： Shallow tunnel-type anchorage Soft rock Anti-pull tie Bearing behaviors Stability control measures

Macro and micro failure mechanism of surrounding rock of small span tunnel under different stress paths

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Journal of Central South University 2022年第5期29卷 1616-1629页

作者： LIU He-yi CONG Yu ZHANG Li-ming ZHENG Ying-ren WANG Zai-quan ABI erdi LIU Li-peng College of Civil of Engineering Qingdao University of TechnologyQingdao 266033China Cooperative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone Qingdao University of TechnologyQingdao 266033China Chongqing Jiaotong University Chongqing 400074China State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower ResearchBeijing 100048China

According to the different stress paths,similar model test and PFC simulation test of tunnel surrounding rock are designed to compare the failure mechanisms at macroscopic and mesoscopic *** following conclusions are drawn.1)Excavation unloading will disturb the surrounding rock to form a certain excavation damaged zone.2)Under the loading path,the stress of surrounding rock failure is 1.500 MPa;under the unloading path with initial stress of 60% σ_(Zmax) and 100% σ_(Zmax),the failure stress is 1.583 and 1.833 MPa respectively in the model test.3)In terms of the failure mode of rocks under different stress paths,tensile fractures first appear in two sides of the vertical walls;thereafter,the spandrel and arch foot are loosened due to the stress *** fractures gradually coalesce with those occurring in the vertical walls.4)In the process of excavation unloading,the proportion of shear cracks is 35.3%,and the rock is subject to strong shear *** final failure surface is approximately V-shaped.5)The tangential peak stress on the vertical walls at the free face is the lowest;the vertical walls at the free face show the poorest bearing capacity and are easily subjected to tensile failure.

关键词： stress paths similarity test PFC simulation excavation unloading macroscopic and mesoscopic scales

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CO2相变冲击下岩石损伤演化规律研究

长沙理工大学学报(自然科学版) 2024年第04期21卷 91-102页

作者：李浩田阿比尔的贺林林蒲运杰刘明维韩亚峰重庆交通大学国家内河航道整治工程技术研究中心山区公路水运交通地质减灾重庆市教委重点实验室

【目的】CO2相变致裂技术具有环保、低危险、便于控制等优点，被广泛应用于矿产开采、工程施工等领域。探究CO2相变致裂损伤演化规律对爆破施工参数的选取具有重要意义。【方法】针对等当量炸药损伤模型描述CO2相变破岩过程的局限性，... 详细信息

【目的】CO2相变致裂技术具有环保、低危险、便于控制等优点，被广泛应用于矿产开采、工程施工等领域。探究CO2相变致裂损伤演化规律对爆破施工参数的选取具有重要意义。【方法】针对等当量炸药损伤模型描述CO2相变破岩过程的局限性，采用理想气体状态方程表述超临界CO2相变过程，结合Mises准则给出相变作用下的岩石损伤半径计算模型，基于LS-DYNA软件建立相变作用下岩石损伤计算模型，分析了CO2相变作用下岩石损伤演化规律，并进一步讨论了破裂压力、致裂管型号等参数对岩石损伤演化的影响。【结果】建立的相变岩石损伤半径计算模型能较好地评价岩石的损伤范围；相变冲击使岩石产生径向裂隙，CO2相变气体嵌入主裂纹附近的裂缝中，裂纹尖端效应促使岩体产生更为密集的环向裂隙及细小的轴向裂隙。数值模拟结果显示，在174、250、290 MPa三种破裂压力下，85型致裂管产生的裂隙区范围分别为0.42、0.43、0.46 m；裂隙长度的增大幅度则随着管径的增大而减小，51型、85型、100型三种型号致裂管在290MPa的破裂压力下产生的裂隙平均长度比在174 MPa下的分别提高13.2%、5.75%、1.41%；破裂压力为250MPa时，三种致裂管所产生的裂隙区范围分别为0.42、0.43、0.47 m；在这三种破裂压力下，100型致裂管下的裂隙平均长度比51型致裂管下的分别增加14.2%、11.1%、2.4%；此外，随着破裂压力和致裂管管径两个参数的增大，相变致裂所产生的主裂隙和环向裂隙增多，岩石的裂隙平均长度增大。【结论】研究结果可为CO2相变致裂施工的损伤控制、技术参数选取等提供参考。

关键词： CO2相变致裂等当量炸药损伤半径影响因素裂隙尺寸