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Treatment of Cr（VI） contaminated groundwater by PRB simulation with ash and iron

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Treatment of Cr（VI） contaminated groundwater by PRB simula...

Geochemistry and origins of hydrogen-containing natural gases in deep Songliao Basin,china:Insights from continental scientific drilling

2.10 International Conference on Nuclear Energy and engineering technology (NEET 2.10)

作者： Wei Zhang School of Energy and Environment engineering Hebei University of technology Tianjin {2. Huasheng Wang Faculty of Architectural and Mapping engineering Jiangxi University of Science and technology Ganzhou Jiangxi Province {2. feng ding college Of geoscience and surveying engineering {2. University of mining & technology

The simulating PRB was filled with iron and fly ash, the ratio of two materials was 1:1. The groundwater contaminated by Cr （VI） was conducted by dynamic simulating test. The experiment showed that the pH was changing in the flowing water treated with simulating PRB and the water volume changes with the processing of experiment, also showed the removal ratio of Cr （VI）. The testing results show when the pH of flowing water is 7-8,the effect of treated water is well. And, with the experiment is going on, the water volume is steady in a time, the removal ratio of Cr （VI） has close relationship with pH in flowing water treated by simulating PRB. As a result of Statistical data, there are great relationships between three factors which are pH in flowing water treated by simulating PRB, water volume treated by simulating PRB and the removal ratio of Cr （VI）. The experiment show that PRB technology can be designed on site in right place to treat the Cr（VI） contaminated groundwater as soon as the media of PRB can be changed in time, and control the pH、the ratio of the media.

关键词： iron and ash contamination of groundwater Cr(VI) PRB

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Petroleum Science 2024年第2期21卷 741-751页

作者： Shuang-Biao Han Chao-Han Xiang Xin Du Lin-feng Xie Jie Huang Cheng-Shan Wang college of geoscience and {2. engineering China University of Mining and TechnologyBeijing100083China State Key Laboratory of Biogeology and Environmental Geology China University of GeosciencesBeijing100083China

The different reservoirs in deep Songliao Basin have non-homogeneous lithologies and include multiple layers with a high content of hydrogen *** gas composition and stable isotope characteristics vary significantly,but the origin analysis of different gas types has previously been *** on the geochemical parameters of gas samples from different depths and the analysis of geological settings,this research covers the diverse origins of natural gas in different *** gas components are mainly methane with a small amount of C_(2.),and non-hydrocarbon gases,including nitrogen(N_(2.),hydrogen(H_(2.),carbon dioxide(CO_(2.),and helium(He).At greater depth,the carbon isotope of methane becomes heavier,and the hydrogen isotope points to a lacustrine sedimentary *** increasing depth,the origins of N_(2.and CO_(2.change gradually from a mixture of organic and inorganic to *** origins of hydrogen gas are complex and include organic sources,water radiolysis,water-rock(Fe^(2.)-containing minerals)reactions,and *** shales of Denglouku and Shahezi Formations,as source rocks,provide the premise for generation and occurrence of organic ***,the deep faults and fluid activities in Basement Formation control the generation and migration of mantle-derived *** discovery of a high content of H_(2.in study area not only reveals the organic and inorganic association of natural-gas generation,but also provides a scientific basis for the exploration of deep hydrogen-rich gas.

关键词： Gas compositions Stable isotopes Gas origins Hydrogen gas Songliao Basin

Case study on the mechanics of NPR anchor cable compensation for large deformation tunnel in soft rock in the Transverse Mountain area,china

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Journal of Central South University 2024年第6期31卷 2054-2069页

作者： LI Yong ZHENG Jing HUO Shu-sen WANG feng-nian HE Man-chao TAO Zhi-gang college of geoscience and {2. engineering China University of Mining and Technology(Beijing)Beijing 100083China State Key Labortaory for Fine Exploration and Intelligent Development of Coal Resources China University of Mining and Technology(Beijing)Beijing 100083China State Key Laboratory for Tunnel engineering China University of Mining and Technology(Beijing)Beijing 100083China Shanxi Provincial Transportation technology Research and Development Co.Ltd. Key Laboratory of Highway Construction and Maintenance Technology in Loess AreaTransportation IndustryTaiyuan 030000China

A study was conducted to analyze the deformation mechanism of strongly weathered quartz schist in the Daliangshan Tunnel,located in the western Transverse Mountain area.A large deformation problem was experienced during the tunnel *** mitigate this problem,a support system was designed incorporating negative Poisson ratio(NPR)anchor cables with negative Poisson ratio *** model experiments,field experiments,and numerical simulation experiments were conducted to investigate the compensation mechanical behavior of NPR anchor *** large deformations of soft rocks in the Daliangshan Tunnel are caused by a high ground stress,a high degree of joint fracture development,and a high degree of surrounding rock fragmentation.A compensation mechanics support system combining long and short NPR anchor cables was suggested to provide sufficient counter-support force(approximately 350 kN)for the surrounding rock inside the *** the NPR anchor cable support system with the original support system used in the Daliangshan tunnel showed that an NPR anchor cable support system,combining cables of 6.3 m and 10.3 m in length,effectively prevented convergence of surrounding rock deformation,and the integrated settlement convergence value remained below 300 *** study provides an effective scientific basis for resolving large deformation problems in deeply buried soft rocks in western transverse mountain areas.

关键词： soft rock large deformation NPR anchor cable physical model numerical simulation compensation mechanics

Age and petrogenesis of late Mesozoic intrusions in the Huoluotai porphyry Cu-(Mo)deposit,northeast china:Implications for regional tectonic evolution

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geoscience Frontiers 2022年第2期13卷 311-332页

作者： Yong-gang Sun Bi-le Li Zhong-hai Zhao feng-yue Sun Qing-feng {2. Xu-sheng Chen Jie-biao Li Ye Qian Yu-jin Li college of Earth Sciences Jilin UniversityChangchun 130061China college of mining Liaoning Technical UniversityFuxin 123000China Qiqihaer Institute of Geological Exploration Heilongjiang 161006China School of Environment Harbin Institute of TechnologyHarbin 150090China School of Environmental Science and engineering Southern University of Science and TechnologyShenzhen 518055China Key Laboratory of Mineral Resources Evaluation in Northeast Asia Ministry of Land and ResourcesChangchun 130061China

Multi-stage igneous rocks developed in the recently discovered Huoluotai Cu-(Mo)deposit provide new insights into the controversial late Mesozoic geodynamic evolution of the northern segment of the Great Xing’an Range(NSGXR).Zircon U-Pb dating suggests that the monzogranite,ore-bearing granodiorite porphyry,diorite porphyry,and granite porphyry in the deposit were emplaced at 179.5±1.6,148.9±0.9,146.1±1.3,and 142.2.1.5 Ma,*** Re-Os dating of molybdenite yielded an isochron age of 146.9±2.3 Ma(MSWD=0.2.).The Jurassic adakitic monzogranite and granodiorite porphyry are characterized by high SiO_(2.and Na_(2.O contents,low K_(2.O/Na_(2.O ratios,low Mg O,Cr,and Ni contents,low zirconεHf(t)values relative to depleted mantle,and relatively high Th *** were produced by partial melting of a subducted oceanic slab,with involvement of marine sediments in the magma source and limited interaction with mantle peridotites during magma *** Late Jurassic diorite porphyry is characterized by moderate SiO_(2. contents,high Mg O,Cr,and Ni contents,and positive dominatedεHf(t)values,indicating it was produced by partial melting of a subduction-modified lithospheric mantle wedge and underwent limited crustal contamination during magma *** early Early Cretaceous adakitic granite porphyry shows high SiO_(2. and K_(2.O contents and K_(2.O/Na_(2.O ratios,low Mg O,Cr,and Ni contents,enriched Sr-Nd isotopic compositions,and slightly positive zirconεHf(t)values,suggesting it was produced by partial melting of thickened mafic lower *** NSGXR experienced a tectonic history that involved flat-slab subduction(2.0-160 Ma),and tearing and collapse(150-145 Ma)of the Mongol-Okhotsk oceanic *** period of magmatic quiescence from ca.160 to 150 Ma was a response to flat-slab subduction of the Mongol-Okhotsk oceanic *** thickening in the NSGXR(145-133 Ma)was due to the collision between the Amuria Block and the Siberian Craton.

关键词： Geochemistry Zircon U-Pb dating Huoluotai Cu-(Mo)deposit Flat-slab subduction Mongol-Okhotsk Ocean

基于SSA-CG-Attention模型的多因素采煤工作面涌水量预测

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煤田地质与勘探 2024年第4期52卷 111-119页

作者：丁莹莹尹尚先连会青刘伟李启兴祁荣荣卜昌森夏向学李书乾华北科技学院河北省矿井灾害防治重点实验室北京101601 吉林大学建设工程学院吉林长春130026 中国矿业大学(北京)地球科学与测绘工程学院北京100083

矿井工作面涌水量预测对确保矿山安全、优化资源配置、提高工作效率等都具有重要作用。为提高预测结果的准确性和稳定性,基于钻孔水位和微震能量数据与涌水量的强关联性,选择其作为多因素特征变量,提出SSA-CG-Attention多因素矿井工作... 详细信息

矿井工作面涌水量预测对确保矿山安全、优化资源配置、提高工作效率等都具有重要作用。为提高预测结果的准确性和稳定性,基于钻孔水位和微震能量数据与涌水量的强关联性,选择其作为多因素特征变量,提出SSA-CG-Attention多因素矿井工作面涌水量预测模型。该模型在门控循环单元(GatedRecurrentUnit,GRU)提取时序特征的基础上,与卷积神经网络(ConvolutionalNeuralNet-work,CNN)融合形成新的网络结构提取数据的有效非线性局部特征,并且加入注意力机制(Atten-tion),在预测过程中将注意力集中在输入元素上,提高模型的准确性。最后通过麻雀搜索算法(Spar-row Search Algorithm,SSA)优化模型参数,避免局部最优解的问题。将提出的模型分别与传统的BP神经网络、LSTM、GRU单因素涌水量预测模型以及MLP、SLP、SVR、LSTM、GRU、SSA-LSTM、SSA-GRU多因素涌水量预测模型的预测结果进行对比分析,结果表明:SSA算法以最少迭代次数快速寻优,避免了局部最优解的缺陷;SSA-CG-Attention多因素涌水量预测模型整体预测指标绝对误差(E_(MA))、均方根误差(E_(RMS))以及平均绝对百分比误差(E_(MAP))分别为5.2. m^(3)/h、7.2. m^(3)/h、6%,指标方差和为8.90。相较于其他预测模型预测精度更高,相较于单因素涌水量预测模型,多因素涌水量预测模型预测结果更加稳定。研究结果为矿井工作面涌水量预测提供了新的思路与方法,对矿井工作面涌水量预测及防控有着借鉴与指导作用,具有一定的理论价值和现实意义。

关键词：涌水量预测卷积神经网络门控循环单元注意力机制多因素预测微震能量

2.00~2.2.年辽宁省生态系统服务评估与多情景预测

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环境科学 2024年第7期45卷 4137-4151页

作者：赵恒谦刘哿杨姿涵刘轩绮苗群峰付含聪中国矿业大学(北京)地球科学与测绘工程学院北京100083 河北省地质矿产勘查开发局第八地质大队秦皇岛066000

生态系统服务评估和预测在可持续地区发展和资源管理中扮演着关键角色.辽宁省作为中国东北地区的一个典型代表,在面临着城市化、工业化和农业现代化等快速发展的挑战同时,也迫切需要更深入地了解其生态系统的演化趋势以及对生态系统服... 详细信息

生态系统服务评估和预测在可持续地区发展和资源管理中扮演着关键角色.辽宁省作为中国东北地区的一个典型代表,在面临着城市化、工业化和农业现代化等快速发展的挑战同时,也迫切需要更深入地了解其生态系统的演化趋势以及对生态系统服务的影响.以辽宁省2.00~2.2.年土地利用变化情况为基础,利用InVEST-Markov-PLUS模型对辽宁省过去-未来的生态系统服务评估及多情景预测等开展了模拟研究,为更好地促进生态系统服务,推动辽宁省高质量均衡发展提供科学可靠的建议.结果发现:(1)2.00~2.2.年,辽宁省碳储量和土壤保持量总体呈升高趋势,产水量呈现先降后升再降的波动降低态势.(2.辽宁省碳储量和土壤保持量呈现出东部山区和西部丘陵高,中部较低的趋势,产水量呈现出从东到西递减的趋势.(3)生态系统服务价值从5 479.44亿元上升到5 655.2.亿元,总计上升了175.82.元,且4种服务在研究时期内均有上升,文化服务变化最快.(4)2.30年,辽宁省碳储量和土壤保持总量除生态保护情景外均有所下降,产水量除耕地保护情景有所上升,其他3种情景下均有所下降,研究区生态系统服务价值除经济优先情景外均有所上升.

关键词：生态系统服务评估 InVEST模型 Markov模型 PLUS模型多情景预测辽宁省

Characteristics of microseismic b-value associated with rock mass large deformation in underground powerhouse caverns at different stress levels

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Journal of Central South University 2022年第2期29卷 693-711页

作者： LI Biao ding Quan-fu XU Nu-wen DAI feng XU Yuan QU Hong-lue School of geoscience and technology Southwest Petroleum UniversityChengdu 610500China State Key Laboratory of Explosion Science and technology Beijing Institute of TechnologyBeijing 100081China State Key Laboratory of Hydraulics and Mountain River engineering College ofWater Resource and HydropowerSichuan UniversityChengdu 610065China Department of engineering Science University of OxfordOX51PFUnited Kingdom

Rock mass large deformation in underground powerhouse caverns has been a severe hazard in hydropower engineering in Southwest *** the development of rock mass large deformation,a sequence of fractures was generated that can be monitored using microseismic(MS)monitoring *** MS monitoring systems were established in two typical underground powerhouse caverns featuring distinct geostress *** MS b-values associated with rock mass large deformation and their temporal variation are *** results showed that the MS bvalue in course of rock mass deformation was less than 1.0 in the underground powerhouse caverns at a high stress level while larger than 1.5 at a low stress *** to the rock mass deformation,the MS b-values derived from both the high-stress and low-stress underground powerhouse caverns show an incremental decrease over 10%within 10 *** results contribute to understanding the fracturing characteristics of MS sources associated with rock mass large deformation and provide a reference for early warning of rock mass large deformation in underground powerhouse caverns.

关键词： underground powerhouse caverns rock mass large deformation stress level microseismic monitoring bvalue

多卫星星座对时变重力场反演精度和时空分辨率影响的模拟研究

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地球物理学报 2024年第6期67卷 2125-2140页

作者：郭丁昊王长青朱紫彤熊宇昊杨萌钟敏沈云中陈秋杰冯伟中山大学测绘科学与技术学院广东珠海519082 极地环境立体观测与应用教育部重点实验室(中山大学) 广东珠海519082 大地测量与地球动力学国家重点实验室中国科学院精密测量科学与技术创新研究院武汉430071 中国科学院大学北京100049 同济大学测绘与地理信息学院上海200092

近二十年,GRACE/GRACE-FO实现了对地球时变重力场的连续监测.但受单极轨轨道配置、背景模型误差和载荷精度的限制,其时空分辨率和观测精度不足以探测短时间、小尺度的质量变化信号.以欧空局MAGIC(Mass Change and geoscience Internatio... 详细信息

近二十年,GRACE/GRACE-FO实现了对地球时变重力场的连续监测.但受单极轨轨道配置、背景模型误差和载荷精度的限制,其时空分辨率和观测精度不足以探测短时间、小尺度的质量变化信号.以欧空局MAGIC(Mass Change and geoscience International Constellation)和中山大学“天琴计划”为代表的下一代重力计划将通过多对卫星星座和新一代高精度载荷来提高时变重力场反演精度.考虑到未来多项卫星重力计划和当前GRACE-FO、中国重力卫星同期观测的可能,本文基于动力学方法对双极轨、Bender、极轨+Bender和双Bender四种星座构型进行了闭环仿真模拟,并对其月尺度解和1~3天短周期解进行评估.结果表明:(1)相较于单极轨,双极轨、Bender、极轨+Bender和双Bender四种星座的月尺度时变重力场恢复精度分别提高了30.7%、85.7%、85.9%和89.5%.(2.多对卫星星座能够恢复高空间分辨率的短周期时变重力场解,且在时间序列中能够保留地球物理信号的高频部分.其中双Bender能够恢复40阶的1天解时变重力场,极轨+Bender能够恢复40阶的2.解时变重力场,Bender能够恢复40阶的3天解时变重力场.

关键词：下一代重力计划卫星编队闭环模拟

Geochronology and Geochemistry of the 890 Ma I-Type Granites in the Southwestern Yangtze Block:Petrogenesis and Crustal Evolution

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Journal of Earth Science 2020年第6期31卷 1216-1228页

作者： Jibiao Zhang Xiaozhong ding Yanxue Liu Heng Zhang Chenglong Shi Yu Zou Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China college of geoscience and {2. engineering China University of Mining&TechnologyBeijing 100083China

The tectonic evolution of the southwestern Yangtze Block during the Early Neoproterozoic period is still controversial because of the limited quantities of 1000–860 Ma magmatic *** this study,our new LA-ICP-MS zircon U-Pb dating results demonstrate that the Yanbian granodiorites in the southwest Yangtze Block were emplaced at 894.6±7.4 Ma,representing the product of an 894 Ma *** Yanbian granodiorites are metaluminous to weak peraluminous with A/CNK values of 0.8–1.1,resembling Itype *** are characterized by right-inclined REE patterns with moderate to insignificant negative Eu anomalies(δEu=0.6–0.9).Their primitive mantle-normalized trace element patterns are characterized by depletion of Nb,Ta and Ti and weakly enrichment of *** the positive whole-rockεNd(t)(+5.8 to+6.8),we propose that these granodiorites originated from the partial melting of juvenile mafic lower *** Yanbian I-type granitoids have low Y and Nb contents similar to volcanic arc igneous rocks in the Y-Nb plot for tectonic *** conclusion,Early Neoproterozoic Yanbian granodiorites have generated in a compression setting in an active continental *** with previous studies from the southwestern Yangtze Block,we suggest that the 894 Ma subduction-related Yanbian granodiorites represent the early stage of subduction at the southwestern margin of the Yangtze Block.

关键词： I-type granites zircon U-Pb dating Early Neoproterozoic subduction southwestern Yangtze Block