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多炮孔岩体等离子体爆破定向致裂机理研究

工程科学学报 2025年第2期47卷 259-270页

作者：李雪王传兵王雁冰梅洪嘉李琰庆王兆阳肖殿才淮南矿业(集团)有限责任公司深部煤炭安全开采与环境保护全国重点实验室淮南232000 中国矿业大学(北京)力学与土木工程学院北京100083

为了研究等离子爆破技术结合切缝管和预切槽技术的定向致裂效果,开展等离子体电脉冲定向致裂试验,探究不同切缝管切缝形状和不同预切槽间距下等离子体爆破定向致裂机理和定向断裂效果,对比分析不同定向形式作用下等离子体爆破岩石定向... 详细信息

为了研究等离子爆破技术结合切缝管和预切槽技术的定向致裂效果,开展等离子体电脉冲定向致裂试验,探究不同切缝管切缝形状和不同预切槽间距下等离子体爆破定向致裂机理和定向断裂效果,对比分析不同定向形式作用下等离子体爆破岩石定向断裂贯通效果.结果表明,与正楔形切缝管和平切形切缝管相比,切缝管岩石试件中倒楔形结构中产生的应力峰值最大,聚能效果最显著,其定向贯通岩石效果更显著.预切槽岩石的电爆聚能致裂效果随着钻孔切槽间距的增加而减小.切槽间距为40 mm时,预切槽岩石试件等离子体电脉冲的聚能效果优异,产生定向裂纹的效果明显优于切槽间距为50 mm和60 mm的预切槽岩石试件.同时,预切槽定向形式的等离子体爆破定向致裂效果相对于切缝管定向致裂效果更为显著.

关键词：等离子体电脉冲爆破定向致裂切缝管预切槽数值模拟

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Influence of water coupling coefficient on the blasting effect of red sandstone specimens

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International Journal of Coal Science & Technology 2024年第1期11卷 148-166页

作者： Yang Li Renshu Yang yanbing wang Dairui Fu School of Mechanics and Civil Engineering China University of Mining and Technology(Beijing)Beijing100083China School of Civil and Resource Engineering University of Science and Technology BeijingBeijing100083China

This study investigates the impact of different water coupling coefficients on the blasting effect of red *** analysis is based on the theories of detonation wave and elastic wave,focusing on the variation in wall pressure of the blasting *** DDNP explosive as the explosive load,blasting tests were conducted on red sandstone specimens with four different water coupling coefficients:1.20,1.33,1.50,and *** study examines the morphologies of the rock specimens after blasting under these different water coupling ***,the fractal dimensions of the surface cracks resulting from the blasting were calculated to provide a quantitative evaluation of the extent of rock *** scanning and 3D reconstruction were performed on the post-blasting specimens to visually depict the extent of damage and fractures within the ***,the volume fractal dimension and damage degree of the post-blasting specimens are *** findings are then combined with numerical simulation to facilitate auxiliary *** results demonstrate that an increase in the water coupling coefficient leads to a reduction in the peak pressure on the hole wall and the crushing zone,enabling more of the explosion energy to be utilized for crack propagation following the *** specimens exhibited distinct failure patterns,resulting in corresponding changes in fractal *** simulated pore wall pressure–time curve validated the derived theoretical results,whereas the stress cloud map and explosion energy-time curve demonstrated the buffering effect of the water *** the water coupling coefficient increases,the buffering effect of the water medium becomes increasingly prominent.

关键词： Water coupling coefficient Radial uncoupled charge Numerical simulation Fractal dimension

Fracture characteristics of iron ore under uncoupled blast loading

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International Journal of Mining Science and Technology 2022年第4期32卷 657-667页

作者： Jinjing Zuo Renshu Yang Min Gong Xinmin Ma yanbing wang School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China State Key Laboratory for Geomechanics and Deep Underground Engineering(Beijing) Beijing 100083China School of Mechanics and Civil Engineering China University of Mining and Technology-BeijingBeijing 100083China

A blasting experiment was conducted on iron ore samples by considering multiple coupling charge *** resulting internal fracture and damage characteristics were quantitatively analyzed via computerized tomography(CT),scanning,and three-dimensional(3D)model *** results show that the iron ore primarily displayed radial and circumferential cracks along the blast hole under an explosive *** the decoupling coefficient was small,the crack surface was dominated by transgranular fractures in the form of intracrystalline *** the uncoupling coefficient increased,the crack surface exhibited transgranular and intergranular coupled fracture *** fractal theory to analyze crack distribution characteristics,as the decoupled coefficient increased,the body fractal dimension tended to decrease,and the degree of damage gradually *** degree of damage reached a turning point when the decoupling charge coefficient was approximately 1.33.A numerical simulation suggested that the explosion energy transmitted to the iron ore and the effective stress decrease sharply when the decoupling coefficient exceeds *** some optimal uncoupling coefficient range,excessive fragmentation of the ore body is prevented,thereby allowing full use of the explosive energy.

关键词： Blasting Iron ore X-ray CT Damage evolution Fractal dimension

Detecting micro-blog user interest communities through the integration of explicit user relationship and implicit topic relations

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Science China(Information Sciences) 2017年第9期60卷 64-77页

作者： Yu QIN Zhengtao YU yanbing wang Shengxiang GAO Linbin SHI Institute of Information Engineering and Automation Kunming University of Science and Technology Key Laboratory of Intelligent Information Processing Kunming University of Science and Technology

In order to effectively utilize the explicit user relationship and implicit topic relations for the detection of micro-blog user interest communities, a micro-blog user interest community(MUIC) detection approach is proposed. First, through the analysis of the follow relationship between users, we have defined three types of such relationships to construct the user follow-ship network. Second, taking the semantic correlation between user tags into account, we construct the user interest feature vectors based on the concept of feature mapping to build a user tag based interest relationship network. Third, user behaviors, such as reposting, commenting, replying, and receiving comments from others, are able to provide certain guidance for the extraction of micro-blog topics. Hence, we propose to integrate the four mentioned user behaviors that are considered to provide guidance information for the traditional latent Dirichlet allocation(LDA) model. Thereby, in addition to the construction of a topic-based interest relationship network, a guided topic model can be built to extract the topics in which the user is interested. Finally, with the integration of the afore-mentioned three types of relationship network, a micro-blog user interest relationship network can be created. Meanwhile, we propose a MUIC detection algorithm based on the contribution of the neighboring nodes. The experiment result proves the effectiveness of our approach in detecting MUICs.

关键词： feature mapping implicit topic guided topic model contribution of the neighboring nodes

Theoretical and numerical simulation investigation of deep hole dispersed charge cut blasting

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International Journal of Coal Science & Technology 2023年第1期10卷 87-107页

作者： Chengxiao Li Renshu Yang yanbing wang Yiqiang Kang Yuantong Zhang Pin Xie School of Mechanics and Civil Engineering ChinaUniversity of Mining and Technology-BeijingBeijing 100083China School of Civil and Resource Engineering Universityof Science and Technology BeijingBeijing 100083China Gubei Coal Mine of Huaizhe Coal and Electricity Co. LtdHuainan 232150China

Drilling and blasting methods have been used as a common driving technique for shallow-hole driving and blasting in rock *** the advent of digital electronic detonators and the need for increased production efciency,the traditional blasting design is no longer suitable for deep hole *** this paper,a disperse charge cut blasting method was proposed to address the issues of low excavation depth and high block rate in deep hole undercut ***,a blasting model was used to illustrate the mechanism of the deep hole dispersive charge cut blasting ***,continuous charge and dispersed charge blasting models were developed using the smooth particle hydrodynamics-fnite element method(SPHFEM).The cutting parameters were determined theoretically,and the cutting efciency was introduced to evaluate the cutting *** blasting efects of the two charging models were analyzed utilizing the evolution law of rock damage,the number of rock particles thrown,and the cutting *** results show that using a dispersed charge improves the cutting efciency by about 20%and the rock breakage for the deep hole cut blasting compared to the traditional continuous *** addition,important parameters such as cutting hole spacing,cutting hole depth and upper charge proportion also have a signifcant impact on the cutting ***,the deep hole dispersed charge cut blasting technology is combined with the digital electronic detonator through the feld engineering *** provides a reference for the subsequent deep hole cutting blasting and the use of electronic detonators in rock roadways.

关键词： Deep hole blasting Cut blasting Dispersed charge SPH-FEM Digital electronic detonator

Novel 3D Printed Modular Hemipelvic Prosthesis for Successful Hemipelvic Arthroplasty： A Case Study

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Journal of Bionic Engineering 2018年第6期15卷 1067-1074页

作者： Xin Zhao Jianlin Xiao Yu Sun Zhe Zhu Meng Xu Xiaonanwang Feifei Lin yanbing wang Jincheng wang Orthopedic Department the Second Hospital of Jilin University Changchun 130041 China Orthopedic Department China-Japan Union Hospital of Jilin University Changchun 130033 China

In this study, in order to prevent the failure of hemipelvic arthroplasty using a patient-specific Computer-Aided Design （CAD） and Additive Manufacturing （AM） approach, a new design for modular hemipelvic prosthesis was developed. Moreover, the biomechanical properties of the new design were determined. The 3D printed pelvic prosthesis with a sacrum portion that completely matches the back surface of the patient＇s sacrum offers more potential for bone ingrowth between the host bone and prosthesis. The new approach integrated the capabilities of digital medical imaging techniques, CAD and metal AM to realize a modular hemipelvic prosthesis. The patient＇s pelvic Digital Imaging and Communication in Medicine （DICOM） data were imported into Mimics software to construct a digital representative patient model for design of the prosthesis. A physical model was obtained using a Stereolithography （SLA） 3D printer for preoperative planning. The final customized implant was designed by using UG NX 10.0 software. Then a surgically modular hemipelvic prosthesis was fabricated from the Ti6Al4V titanium alloy by electron beam melting technology. The operation was performed according to the preoperative planning. The outcome of the operation was good at the 6-month follow-up. Also, the stress distribution and the relative micromotion revealed positive results based on a finite element model built to detect prosthesis stability. The 3D printed modular hemipelvic prosthesis provided good resolution for the failure of hemipelvic arthroplasty. Personal customization will be important in future surgeries aiming at improving the anatomy and function of the implant.

关键词： 3D printing hemipelvic prosthesis 3D reconstruction rapid prototype bionic prosthesis design

Increase Renaturation Yield of Reteplase Using the Recombinant Human Protein Disulfide Isomerase

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High Technology Letters 2004年第1期10卷 49-51页

作者：赵友春 wang Ge Kong Yang wang yanbing Zhang Changkai Chen Chao Liang Bufeng State Key Lab. of Microbial Technology Shandong University Jinan 250100 P.R. China Department of Science & Technology of Shandong Province Jinan 250011 P.R.China Shandong Younglong Biotechnology Co. Jinan 250100 P.R. China State Key Lab. of Microbial Technology Shandong University Jinan 250100 P.R. China

Reteplase, the recombinant type of novel tissue plasminogen activator (t-PA) variant, is a promising thrombolytics in clinics. Expressed in the form of an inclusion body, reteplase consists of about 40 % of the total intracellular proteins of Escherichia coli. The recombinant human protein disulfide isomerase (rhPDI) is used to increase the chance for the correct matching of the 18 hydrosulfide groups of the reteplase molecule in the renaturation process and it increase is the reteplase renaturation yield from 1%～2% to 15%～20% with a the purity aboue 99% and the specific activity of 5(105 IU/mg is reached. This novel method can reduce significantly the cost of production.

关键词：人体组织血浆酶原催化剂硫蛋白异构酶重建复活产量心脑血管疾病溶血栓剂

Effect of sodium content on the interaction between Ni and support and catalytic performance for syngas methanation over Ni/Zr–Yb–O catalysts

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Chinese Journal of Chemical Engineering 2019年第11期27卷 2705-2711页

作者： Songshou Ye Jiawei Guo yanbing wang Jianrong Xie Zhiming Liu Nuowei Zhang Jinbao Zheng Zhikai Cao Binghui Chen Department of Chemical and Biochemical Engineering National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-EstersCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China

In this paper, Ni/Zr–Yb–O catalysts with different sodium contents are prepared by a co-precipitation method, using aqueous Na2CO3 solution as a precipitant, and the effect of sodium on the catalyst structure and catalytic performance for syngas methanation is extensively investigated using five Ni/Zr–Yb–O catalysts, containing 0, 0.5, 1.5,4.5 and 13.5 wt% Na^+, those are denoted as Cat-1, Cat-2, Cat-3, Cat-4 and Cat-5 respectively. It is found that the interaction between Ni and support determines the catalytic performance of Ni/Zr–Yb–O and the residual sodium content negatively affects the interaction between Ni and support. Cat-1 exhibits an excellent catalytic *** a long run time of 380 h, no deactivation is observed and both CO conversion and CH4 selectivity maintain a level above 90%. However, Cat-3 and Cat-5 suffer rapid deactivation under the same reaction condition. The characterization results indicate the strong interaction between Ni and support enables Cat-1 to possess well dispersed Ni species, resistance to sintering and carbon deposition and thus the excellent catalytic performance. However, the presence of sodium ions over Ni/Zr–Yb–O degrades the interaction between Ni and support and the catalytic performance, especially for the stability. The relative weak interaction between Ni and support results in severe sintering of both ZrO2 and Ni under the reaction condition, carbon deposition and the poor catalytic performance.

关键词： CO methanation Ni/Zr–Yb–O catalyst Sodium content Syngas Stability

Instructive cartilage regeneration modalities with advanced therapeutic implantations under abnormal conditions

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Bioactive Materials 2022年第5期7卷 317-338页

作者： Zhonghan wang Hanxiang Le yanbing wang He Liu Zuhao Li Xiaoyu Yang Chenyu wang Jianxun Ding Xuesi Chen Department of Plastic and Reconstruct Surgery The First Hospital of Jilin University1 Xinmin StreetChangchun130021PR China Department of Orthopedics The Second Hospital of Jilin University218 Ziqiang StreetChangchun130041PR China Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of Sciences5625 Renmin StreetChangchun130022PR China

The development of interdisciplinary biomedical engineering brings significant breakthroughs to the field of cartilage ***,cartilage defects are considerably more complicated in clinical conditions,especially when injuries occur at specific sites(e.g.,osteochondral tissue,growth plate,and weight-bearing area)or under inflammatory microenvironments(e.g.,osteoarthritis and rheumatoid arthritis).Therapeutic implantations,including advanced scaffolds,developed growth factors,and various cells alone or in combination currently used to treat cartilage lesions,address cartilage regeneration under abnormal *** review summarizes the strategies for cartilage regeneration at particular sites and pathological microenvironment regulation and discusses the challenges and opportunities for clinical transformation.

关键词： Cartilage lesion Pathological microenvironment Synergistic effect Tissue engineering Cartilage regeneration