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A multiphysical-geochemical coupling model for caprock sealing efficiency in CO_(2) geosequestration

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Deep Underground Science and Engineering 2023年第2期2卷 188-203页

作者： Jianguo Wang Huimin Wang Xiaolin Wang Shengqi Yang Hongtao Wu chunfai leung Jiali Tian School of Mechanics and Civil Engineering China University of Mining and TechnologyXuzhouChina State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and TechnologyXuzhouChina College of Water Conservancy and Hydropower Engineering Hohai UniversityNanjingChina School of Engineering University of TasmaniaHobartTasmaniaAustralia Center for Offshore Research and Engineering National University of SingaporeSingaporeSingapore

Precipitation or dissolution due to geochemical reactions has been observed in the caprocks for CO_(2) *** reactions modify the caprock sealing efficiency with self-limiting or ***,the effect of this modification on the caprock sealing efficiency has not been fully investigated through multiphysical-geochemical coupling *** this study,a multiphysical-geochemical coupling model was proposed to analyze caprock sealing *** coupling model considered the full couplings of caprock deformation,two-phase flow,CO_(2) concentration diffusion,geochemical reaction,and CO_(2) *** two-phase flow only occurs in the fracture network and the CO_(2) may partially dissolve into water and diffuse through the concentration *** dissolved CO_(2) has geochemical reactions with some critical minerals,thus altering flow *** CO_(2) in the fracture network diffuses into matrix,causing the matrix *** fully coupling model was validated with a penetration experiment on a cement cube and compared with two other models for CO_(2) storage ***,the effects of geochemical reactions on penetration depth and pore pressure were studied through parametric *** numerical simulations reveal that the coupling of geochemical reactions and matrix diffusion significantly affect the caprock sealing *** reactions occur at a short time after the arrival of CO_(2) concentration and modify the fracture *** CO_(2) diffusion into the matrix requires a much longer time and mainly induces matrix *** effects may produce selfenhancement or self-limiting depending on the flow rate in the fracture network,thus significantly modifying caprock sealing efficiency.

关键词： caprock sealing efficiency CO_(2)diffusion CO_(2)geosequestration geochemical reaction sorption strain

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Advancing deep underground research through integration of engineering and science

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Deep Underground Science and Engineering 2022年第1期1卷 1-2页

作者： Heping Xie chunfai leung Jianguo Wang Xiaozhao Li Institute of Deep Earth Sciences&Green Energy Shenzhen UniversityShenzhenChina Sichuan University ChengduChina Center for Offshore Research and Engineering National University of SingaporeSingaporeSingapore School of Mechanics and Civil Engineering China University of Mining and TechnologyXuzhouChina State Key Laboratory for Geomechanics&Deep Underground Engineering China University of Mining and TechnologyXuzhouChina

Deep underground provides enormous resources for mankind,such as energy,minerals,and *** can also provide effective solutions for pollutant disposal,such as nuclear waste disposal and CO_(2) geosequestration,as well as storage *** addition,deep underground is of great necessity because it provides an ultra-quiet environment for scientific research facilities for advanced experiments in physics,chemistry,and medicine.

关键词： addition underground integration

A research on excavation compensation theory for large deformation disaster control and a review on the multiphysical-multiscale responses of salt rock for underground gas storage

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Deep Underground Science and Engineering 2023年第2期2卷 103-104页

作者： Jianguo Wang Heping Xie chunfai leung Xiaozhao Li School of Mechanics and Civil Engineering China University of Mining and TechnologyXuzhouChina Institute of Deep Earth Sciences and Green Energy Shenzhen UniversityShenzhenChina College of Water Resource and Hydropower Sichuan UniversityChengduChina Center for Offshore Research and Engineering National University of SingaporeSingapore State Key Laboratory for Geotechnics and Deep Underground Engineering China University of Mining and TechnologyXuzhouChina

We highlight two articles in this issue:A research article titled“Excavation compensation theory and supplementary technology system for large deformation disasters”by Manchao He et *** a review article titled“Mine... 详细信息

关键词： underground rock deformation

维普期刊数据库博看期刊

New understandings on initiation and evolution of disasters in deep underground

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Deep Underground Science and Engineering 2023年第3期2卷 205-206页

作者： Jianguo Wang Heping Xie chunfai leung Xiaozhao Li School of Mechanics and Civil Engineering China University of Mining and TechnologyXuzhouChina Institute of Deep Earth Sciences and Green Energy Shenzhen UniversityShenzhenChina College of Water Resource and Hydropower Sichuan UniversityChengduChina Center for Offshore Research and Engineering National University of SingaporeSingaporeSingapore State Key Laboratory for Geotechnics and Deep Underground Engineering China University of Mining and TechnologyXuzhouChina

The editors wish to highlight the articles appearing in this *** first article,entitled“New physics of supersonic ruptures”by Boris ***,concerns the development of a new theory on the potential occurrence of ruptures after deep underground *** other articles belong to our first special theme of“Disaster evolution in deep underground.”The final two articles introduce a nonlocal damage fracture phasefield model for rock‐like materials and the gas–liquid displacement in microcleats for mass transfer through gas‐or water‐driven *** five papers indeed explore various aspects of deep underground science and engineering and constitute an integral component of deep underground fundamentals.

关键词： underground displacement evolution

Geothermal energy for sustainable and green energy supply in the future

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Deep Underground Science and Engineering 2024年第3期3卷 255-255页

作者： chunfai leung Jianguo Wang Heping Xie Xiaozhao Li Department of Civil and Environmental Engineering National University of Singapore‐Kent Ridge CampusSingaporeSingapore School of Mechanics and Civil Engineering China University of Mining and TechnologyXuzhouChina College of Civil and Transportation Engineering Shenzhen UniversityShenzhenChina State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering China University of Mining and TechnologyXuzhouChina

Deep Underground Science and Engineering(DUSE)publishes this special issue on geothermal *** guest editors of this special issue are *** Pathegama Gamage(Monash University,Australia),*** Huang(China University of Petroleum,Beijing,China),and *** Bai(Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,China).Geothermal energy is one sustainable and renewable energy and currently a hot research topic in research and *** energy supply is one of the long-term efforts for carbon footprint reductions to tackle climate change *** development of geothermal energy includes exploration and extraction *** special issue is to highlight the challenges on the exploration and extraction of geothermal energy such as initial high cost and difficulties in heat extraction from deep *** special issue focuses on new geothermal extraction system,new theory,new technology,new application of latest techniques such as artificial intelligence,and potential environmental effects.

关键词： Geothermal underground energy

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Editorial highlights

Deep Underground Science and Engineering 2023年第1期2卷 1-1页

作者： Qingbin Meng Heping Xie chunfai leung Xiaozhao Li Jianguo Wang State Key Laboratory for Geomechanics&Deep Underground Engineering China University of Mining and TechnologyXuzhouChina Institute of Deep Earth Sciences&Green Energy Shenzhen UniversityShenzhenChina Sichuan University ChengduChina Center for Offshore Research and Engineering National University of SingaporeSingaporeSingapore School of Mechanics and Civil Engineering China University of Mining and TechnologyXuzhouChina

With the increasing scarcity of shallow resources,the mining depth of coal mines has gradually increased,and the safety problem has become increasingly *** grouting technology for deep roadways in fractured rocks is one of key technologies for safe mining of deep *** paper by the team of Hongpu Kang,academician of the Chinese Academy of Engineering,systematically summarizes and analyzes the research findings in the theory,design,materials,processes,and equipment for the grouting reinforcement of fractured rocks surrounding the deep *** field cases in the Kouzidong coal mine are demonstrated on the application of pregrouting in front of heading faces,grouting in excavation,and postgrouting so as to evaluate the effects of these grouting reinforcements.

关键词： mining heading shallow

Asymptotic false discovery control of the Benjamini-Hochberg procedure for pairwise comparisons

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Science China Mathematics 2025年第1期 223-252页

作者： Weidong Liu Dennis leung Qi-Man Shao School of Mathematical Sciences Shanghai Jiao Tong University School of Mathematics and Statistics University of Melbourne Department of Statistics and Data Science SICMSouthern University of Science and Technology

In a one-way analysis-of-variance(ANOVA) model,the number of pairwise comparisons can become large even with a moderate number of *** by this,we consider a regime with a growing number of groups and prove that,when testing pairwise comparisons,the Benjamini-Hochberg(BH) procedure can asymptotically control false discoveries,despite the fact that the involved t-statistics do not exhibit the wellknown positive dependence structure required for exact false discovery rate(FDR) *** Tukey's perspective that the difference between the means of any two groups cannot be exactly zero,our main result provides control over the directional false discovery rate and directional false discovery proportion.A key technical contribution of our work is demonstrating that the dependence among the t-statistics is sufficiently weak to establish the convergence result typically required for asymptotic FDR *** analysis does not rely on conventional assumptions such as normality,variance homogeneity,or a balanced design,thereby offering a theoretical foundation for applications in more general settings.

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Polyethylene glycol fusion repair of severed sciatic nerves accelerates recovery of nociceptive sensory perceptions in male and female rats of different strains

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Neural Regeneration Research 2025年第9期20卷 2667-2681页

作者： Liwen Zhou Karthik Venkudusamy Emily A.Hibbard Yessenia Montoya Alexa Olivarez Cathy Z.Yang Adelaide leung Varun Gokhale Guhan Periyasamy Zeal Pathak Dale R.Sengelaub George D.Bittner Department of Neuroscience University of TexasAustinTXUSA Program in Neuroscience Indiana UniversityBloomingtonINUSA Department of Molecular Biosciences University of TexasAustinTXUSA

Successful polyethylene glycol fusion(PEG-fusion)of severed axons following peripheral nerve injuries for PEG-fused axons has been reported to:(1)rapidly restore electrophysiological continuity;(2)prevent distal Wallerian Degeneration and maintain their myelin sheaths;(3)promote primarily motor,voluntary behavioral recoveries as assessed by the Sciatic Functional Index;and,(4)rapidly produce correct and incorrect connections in many possible combinations that produce rapid and extensive recovery of functional peripheral nervous system/central nervous system connections and reflex(e.g.,toe twitch)or voluntary *** preceding companion paper describes sensory terminal field reo rganization following PEG-fusion repair of sciatic nerve transections or ablations;howeve r,sensory behavioral recovery has not been explicitly explored following PEG-fusion *** the current study,we confirmed the success of PEG-fusion surgeries according to criteria(1-3)above and more extensively investigated whether PEG-fusion enhanced mechanical nociceptive recovery following sciatic transection in male and female outbred Sprague-Dawley and inbred Lewis *** nociceptive responses were assessed by measuring withdrawal thresholds using von Frey filaments on the dorsal and midplantar regions of the *** von Frey filament tests were a more reliable method than plantar von Frey filament tests to assess mechanical nociceptive sensitivity following sciatic nerve *** withdrawal thresholds of the sciatic-mediated lateral dorsal region differed significantly across strain but not *** thresholds did not change significantly from baseline in chronic Unoperated and Sham-operated *** sciatic transection,all rats exhibited severe hyposensitivity to stimuli at the lateral dorsal region of the hindpaw ipsilateral to the ***,PEG-fused rats exhibited significantly earlier return to baseline withdrawal thresholds than Negative

关键词： autophagia axotomy collateral sprouting neuropathic pain peripheral nerve repair polyethylene glycol fusion(PEG-fusion) saphenous nerve sensory neurons sex and strain Wallerian degeneration

Message from Deputy Editor-in-Chief Gabriel M leung—International Trade and Global Health Protection

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China CDC weekly 2019年第4期1卷 45-46页

作者： Gabriel M leung China CDC Weekly Dean of Medicine The University of Hong KongHong Kong SARChina

It was external trade that first prompted the collection and reporting of surveillance data at the foreign ports from which the US imported *** established Bulletin of the Public Health—the first precursor to the US ... 详细信息

关键词： Trade prompt Health