|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Underground pressure characteristics analysis in back-gully mining of shallow coal seam under a bedrock gully slope显示文摘我们在一个基岩溪谷斜坡下面在浅煤缝接在背溪谷采矿期间学习了地下的压力和它的机制,借助于物理模拟,数字建模并且地监视。结果证明地下的压力的紧张与它在 coalface 的相对位置有关。地下的压力是集中的,当 coalface 在溪谷的底部时,支持抵抗到达最大值,而地下的压力是中等的并且当 coalface 传递溪谷时,逐渐地减少。当斜坡在不稳定的、多边的块依赖了的采矿和形式组织的背溪谷期间在一个颠倒的方向旋转了到斜坡剧降时,这些变化的机制被分析,由于滑倒。当块破碎是小的时,多边的块的沉淀是可观的,导致在地下的压力的庞大的变化。随块身体的团的增加,块排水量将被减少与一起一增加在废矿由未破损的岩石和破岩石夹钳效果,导致地下的压力的减少。 | Wang Xufeng Zhang Dongsheng Fan Gangwei Zhang Chengguo | 2011 | Mining Science and Technology2011，21，1： | 16 |
| 2 | Numerical and analytical simulation of the structural behaviour of fully grouted cable bolts under impulsive loading显示文摘Designing reliable yielding support system to mitigate the effect of the kinetic energy in burst-prone conditions in mining and tunneling excavations is one of the challenges for geotechnical engineers. A combination of the support elements can be used to increase rock strength and minimise the displacement of unstable rock mass. It is important to understand how the support system works to ensure the stability of underground excavations. Cable bolts have been commonly used as an effective underground support system and an element of reinforcement to improve rock stability. Cable bolts are usually considered to be subjected to static loads under relatively low stress environments, however, in burst-prone conditions, they might be subjected to dynamic loads. Cable bolts as well as other support elements are used in burst-prone conditions to absorb the kinetic energy of the removed rock to avoid sudden and violent failures. This paper develops numerical and a novel analytical simulation technique for cable bolts to assess their structural behaviour under static and dynamic loading conditions. The numerical and analytical models are then validated against experimental observations reported in the literature, which demonstrates the reliability of the proposed models. | Faham Tahmasebinia Chengguo Zhang Ismet Canbulat Onur Vardar Serkan Saydam | 2018 | International Journal of Mining Science and Technology2018，28，5： | 9 |
| 3 | Assessment of energy release mechanisms contributing to coal burst显示文摘Coal burst is a dynamic release of energy within the rock(or coal) mass leading to high velocity expulsion of the broken/failed material into mine openings. This phenomenon has been recognised as one of the most catastrophic failures associated with the coal mining industry, which can often lead to injuries and fatalities of miners as well as significant production losses. This paper aims to examine the mechanisms contributing to coal burst occurrence, with an emphasis on the energy release concept. In this study, a numerical modelling study has been conducted to evaluate the roles and contributions of difference energy components. The energy analysis presented in this paper can help to improve the understanding of energy release mechanisms especially under Australian conditions. | Zhang Chengguo Canbulat Ismet Tahmasebinia Faham Hebblewhite Bruce | 2017 | International Journal of Mining Science and Technology2017，27，1： | 7 |
| 4 | Analysis of the influence of groundwater and the stress regime on bolt behaviour in underground coal mines显示文摘The service failure of rock bolts and cable bolts are frequently reported issues in underground coal mines. Whilst numerous experimental investigations concerned with the service failure of bolts have been conducted, numerical modelling offers an alternative approach in evaluating the factors contributing to service failures of bolts in underground mines. In this study, analysis of the influence of groundwater and tensile stress on bolts in underground coal mines was studied through the numerical modelling of a grouted bolt in the immediate roadway roof. Bolt tensile stress and groundwater dripping rates in the immediate roadway roof were analysed using a package based on finite element method to assess the effect of coal roof thickness and claystone bands, as main contributors of known service failures of bolts in roadways of underground coal mines. Increasing coal roof thickness was found to increase bolt dripping rates. Probable location of stress corrosion cracking (SCC) occurrence was established through examining the shift and increase in maximum bolt tensile stress that was exhibited along the bolt length with increasing coal roof thickness. Claystone bands situated at the top and centre horizon of a grouted bolt produced lower bolt dripping rates compared with scenarios with no claystone bands. Intersecting claystone bands at the centre horizon of a bolt for a fully grouted bolt could increase the likelihood of SCC corrosion and bolt failure by contributing to microbial corrosion processes and grout fracturing by tensile stress. This study improves the understanding the bolt failure associated with the presence of groundwater and changing stress environments, which in turn is imperative in formulating strategies to mitigate support element failures and improve the ground support viability. | Jack A.Smith Hamed Lamei Ramandi Chengguo Zhang Wendy Timms | 2019 | International Journal of Coal Science & Technology2019，6，2： | 5 |
| 5 | Atomistic simulation of dynamical and defect properties of multiferroic hexagonal YMnO_3显示文摘Atomistic simulation has been performed to investigate the dynamical and defect properties of multiferroic hexagonal YMnO3 with newly developed interaction potentials. Dynamical calculation reveals that phonon vibrations of hexagonal YMnO3 are quite different from those of orthorhombic YMnO3. Defect calculation finds that O Frenkel is the most probable intrinsic disorder, and Mn antisite defect is favorable to exist, especially for Mn ions entering the Y2 sites. It is also found that holes prefer to localize at O2sites rather than at Mn3+ sites, while the electron can be localized at the Mn3+ site. The disproportionation of Mn3+ ions is unlikely to occur in hexagonal YMnO3. | ZHANG ChengGuo ZHANG XiaoZhong SUN YongHao LIU ShuYi | 2011 | Science China(Physics,Mechanics & Astronomy)2011，54，5： | 4 |
| 6 | Fundamentals of modern ground control management in Australian underground coal mines显示文摘Underground coal mining is inherently hazardous,with uncontrolled ground failure regarded as one of only several critical risks for multiple fatality events.Development,implementation and management of overarching systems and procedures for maintaining strata control is an important step to mitigating the impact of ground failure hazards at a mine site operational level.This paper summarised the typical pro-active ground control management system(PGCMS)implemented in various Australian underground coal mines.Australia produces approximately 100 million tonnes a year of metallurgical and thermal coal from approximately 30 of the world’s safest longwall mines operating in New South Wales and Queensland.The increased longwall productivity required to achieve both high levels of safety and profitability,places significant emphasis on the reliability of pro-active ground control management for longwall mining operations.Increased depths,adverse geological conditions,elevated variable stress regimes and weaker ground conditions,coupled with an industry wide need for increased development rates continue to make ground control management challenging.Ground control management is not only about ground support and pillar design though but also a structured process that requires a coordinated effort from all levels of the workforce to both minimise the occurrence of adverse geotechnical events and mitigate the potential risks when they do occur.The PGCMS presented in this paper is proven to provide both a safer and more productive mine environment through minimisation of unplanned delays.The critical elements of the method are presented in detail and demonstrate the utility and value of a ground control management system that has potential for implementation in underground coal mining globally. | Jason Emery Ismet Canbulat Chengguo Zhang | 2020 | International Journal of Mining Science and Technology2020，30，5： | 4 |
| 7 | A semi-quantitative coal burst risk classification system显示文摘Safety is the highest priority in the mining industry as underground mining in particular poses high safety risks to its workers. In underground coal mines, coal bursts are one of the most catastrophic hazards, which involves sudden and violent dynamic coal mass failure with rapid ejection of the broken material into the mine workings. Despite decades of research, the contributing mechanisms of coal bursts are still not completely understood. Hence, it remains challenging to forecast coal bursts and quantify their likelihood of occurrence. However, a range of geological and geotechnical factors are associated with coal bursts and can increase the coal burst proneness. This paper introduces a semi-quantitative coal burst risk classification system, namely, BurstRisk. Based on back-analysis of case histories from Australia, China and the United States, BurstRisk classifies the coal burst risk into three categories:low, medium and high risk. In addition, it allows mining engineers to modify the weighting of the selected factors based on specific conditions. The risk classification charts introduced are for both longwall retreat and development sections of long-wall mining operations. This paper also provides a set of risk management strategies and control measures for effective coal burst mitigation. | Onur Vardar Chengguo Zhang Ismet Canbulat Bruce Hebblewhite | 2018 | International Journal of Mining Science and Technology2018，28，5： | 3 |
| 8 | Comparative study of mechanical and wear behavior of Cu/WS_2 composites fabricated by spark plasma sintering and hot pressing显示文摘The mechanical and wear behavior of copper-tungsten disulfide(Cu/WS_2) composites fabricated by spark plasma sintering(SPS) and hot pressing(HP) was investigated, comparatively. Results indicated that the addition of lubricant WS_2 substantially reduced wear rate of the Cu matrix composites fabricated by SPS,and the optimum content of WS_2 is 20 wt% with regard to the wear behavior. However, it affected a little to the wear rate while dramatically decreased the friction coefficient of the composite fabricated by HP.This difference in friction behavior of the self-lubricating composites fabricated by the two techniques was closely related to their different mechanical properties. Severe interfacial reaction occurred during spark plasma sintering, leading to brittle phase formation at interface. | Qunchang Wang M inghui Chen Zhongmao Shan Chengguo Sui Lin Zhang Shenglong Zhu Fuhui Wang | 2017 | Journal of Materials Science & Technology2017，33，11： | 3 |
| 9 | Statistical analysis of distribution patterns of coal seams in fold zones in Northwest China显示文摘The mechanisms for rock bursts occurrences in fold zones are complex, and the redistribution of in-situ stresses is closely related to the complexity of the structures. Analysis of the geomorphology of fold structures and changes of coal thickness can help identify zones prone to rock bursts to improve safety and productivity in coal mines. This study investigated the distribution characteristics of fold structures in coal seams in fold zones in four mines in northwest China. Geometrical characteristics of fold structures in coal seams and changes of coal thickness were analysed, based on comprehensive evaluation indexes,such as the length–width ratio of folds, interlimb angle, ratio P1 of projected width of fold limbs to that of the hinge zone, curvature ratio P2, the maximum curvature and amplitude. The statistical analysis of the four coal mines shows that the length–width ratio of folds changed from 0.78 to 2.03 and the maximum curvature of cross sections of folds was less than 0.04. The curvature ratio of cross section of a fold in the structure was no more than 1.4 and the interlimb angles of cross sections of 89% of folds were larger than 150°. Gentle fold structures were dominant and the specific geological morphologies were domes or basins. The isopleth of coal thickness above the coal mines showed a fluctuation trend similar to the contour line of the floor of coal seams. The coal thickness in an anticline area was smaller than that in the neighboring syncline area. Therefore, the overall variation of coal thickness in the mining areas was likely to have a relation with the direction of the regional principal stress. | Anye Cao Guangcheng Jing Linming Dou Yun Wu Chengguo Zhang | 2018 | International Journal of Mining Science and Technology2018，28，5： | 2 |
| 10 | Synthesis of an ordered porous carbon with the dual nitrogen-doped interfaces and its ORR catalysis performance显示文摘Both nitrogen-doping feature and pore structure are critical factors for developing nitrogen-doped carbons based catalysts with a high performance toward oxygen reduction reaction(ORR).Herein,a simple one-step CVD of acetylene and acetonitrile vapor method using silanized SBA-15 as a template has been developed to synthesize an ordered porous carbon(OPC) with dual nitrogen-doped interfaces.The optimized sample as prepared with the CVD of 4 h at 750℃ contains two types of ordered mesopores that one type is the ordered cylindrical pores inheriting from the pores of SBA-15 and has a pore width of4.0~5.0 nm,the other type is the ordered quasi-hexagonal pores with a width of 3.0~4.0 nm produced by etching the pore walls of SBA-15.These two types of pores whose pore walls are built by the nitrogen doped carbon layers resulted by the CVD and thus it actually makes the dual nitrogen-doped interfaced OPC(DN-OPC).Meanwhile,DN-OPC contains a few of micropores and a large SSA of 1430 m~2/g.This dualordered pores and dual nitrogen-doped interfaces cannot only facilitate mass transport but also utilize the active sites of DN-OPC for ORR.Therefore,as metal-free ORR catalyst,DN-OPC exhibits a good activity close to commercial Pt/C catalyst,and an excellent durability and methanol tolerance. | Hongwei Zhao Yanqiu Zhang Li Lixiang Xin Geng Haiming Yang Weimin Zhou Chengguo Sun Baigang An | 2021 | Chinese Chemical Letters2021，32，1： | 2 |
| 11 | A novel and smart automatic light-seeking flowerpot for monitoring flower growth environment显示文摘Although the flowerpot is widely used for indoor flowers,it cannot meet the needs of intelligent management during the uncared-for period.The objective of this study was to design a new microcontroller-based smart flowerpot.Its overall system was composed of three parts:information collection layer,automatic control layer and data transmission layer.Firstly,in the process of collecting information,the Laiyite criterion and the normalized weighted average algorithm were adopted to improve the accuracy of information collection.Secondly,for making precise control decisions,the fuzzy control was used to achieve automatic on-demand watering.Finally,the method for comparative analysis of regional light intensity was utilized to achieve light-seeking and light-supplementing.Experimental results showed that the smart flowerpot had strong anti-jamming performance for information collection,the relative soil moisture of flowers could be stably maintained near the optimum humidity(65%),and the light was well-distributed on the flower with the error angle of light-supplementing ranged from-3°to 3°. | Xihai Zhang Dong Liu Chengguo Fan Jiali Du Fanfeng Meng Junlong Fang | 2018 | International Journal of Agricultural and Biological Engineering2018，11，2： | 2 |
| 12 | Administration of dendritic cells dual expressing DcR3 and GAD65 mediates the suppression of T cells and induces long-term acceptance of pancreatic-islet transplantation显示文摘 | Qiansheng Li Chengguo Ge Rongrong Liu Keqin Zhang Gang Wu Wenqian Huo | 2010 | Vaccine2010，，52： | 1 |
| 13 | A simplified method for the extrinsic calibration of structured-light sensors using a single- ball target显示文摘 | XIE Zexiao Zhang Chengguo Zhang Qiurnei | 2004 | International Journal of Machine Tools and Manufacture2004，44，： | 1 |
| 14 | Specific Regulation of m^(6)A by SRSF7 Promotes the Progression of Glioblastoma显示文摘Serine/arginine-rich splicing factor 7(SRSF7),a known splicing factor,has been revealed to play oncogenic roles in multiple cancers.However,the mechanisms underlying its oncogenic roles have not been well addressed.Here,based on N6-methyladenosine(m^(6)A)co-methylation network analysis across diverse cell lines,we find that the gene expression of SRSF7 is positively correlated with glioblastoma(GBM)cell-specific m^(6)A methylation.We then indicate that SRSF7 is a novel m^(6)A regulator,which specifically facilitates the m^(6)A methylation near its binding sites on the mRNAs involved in cell proliferation and migration,through recruiting the methyltransferase complex.Moreover,SRSF7 promotes the proliferation and migration of GBM cells largely dependent on the presence of the m^(6)A methyltransferase.The two m^(6)A sites on the mRNA for PDZ-binding kinase(PBK)are regulated by SRSF7 and partially mediate the effects of SRSF7 in GBM cells through recognition by insulin-like growth factor 2 mRNA-binding protein 2(IGF2BP2).Together,our discovery reveals a novel role of SRSF7 in regulating m^(6)A and validates the presence and functional importance of temporal-and spatial-specific regulation of m^(6)A mediated by RNA-binding proteins(RBPs). | Yixian Cun Sanqi An Haiqing Zheng Jing Lan Wenfang Chen Wanjun Luo Chengguo Yao Xincheng Li Xiang Huang Xiang Sun Zehong Wu Yameng Hu Ziwen Li Shuxia Zhang Geyan Wu Meisongzhu Yang Miaoling Tang Ruyuan Yu Xinyi Liao Guicheng Gao Wei Zhao Jinkai Wang Jun Li | 2023 | Genomics, Proteomics & Bioinformatics2023，21，4： | 1 |
| 15 | An application of the a-power approximation in multiple life insurance显示文摘 | Zhang Yi Weng Chengguo | 2006 | Insurance: Mathematics and Economics2006，28，： | 1 |
| 16 | Optimal reinsurance under VaR and CTE risk measures显示文摘 | Jun Cai Ken Seng Tan Chengguo Weng Yi Zhang | 2008 | Insurance Mathematics and Economics2008，，1： | 1 |
| 17 | Design and Fabrication of a Novel Core-Suspended Optic Fiber for Distributed Gas Sensor显示文摘我们设计了核心在空气洞和结束里被推迟到内部表面的新奇推迟核心的毛状的纤维毛状,并且试验性地表明了它的制造技术。另外,为连接单个模式纤维的一个方法和推迟核心的纤维基于在在二纤维之间的熔化点拼接并且逐渐变细被建议。由与光时间域反射计技术结合,我们构造了一个分布式的煤气的传感器系统基于这新奇纤维监视温室气体。 | Tao ZHANG | 2014 | Photonic Sensors2014，4，2： | 1 |
| 18 | A review of investigations on ground support requirements in coal burst‑prone mines显示文摘Ground support is widely implemented to mitigate dynamic rock failures in underground mines.This paper investigated the ground support requirements in burst-prone mines to mitigate the catastrophic dynamic rock failures of rock and/or coal bursts.First,the ground support principles and considerations in burst-prone conditions are identified.The objective of a ground support system is to increase the capacity to accommodate rock fracturing in a rockburst and,in turn,to minimize the kinetic energy of the ejected material.The support capacities of various yielding rockbolts and integrated support systems are then investigated using the test results in the laboratory.Apart from the energy absorption and yielding deformation capacity,the initial stiffness and energy absorption rate are also critical factors when applying yielding rockbolts in practice.Adding rope lacing and mesh strap to surface support elements can substantially enhance the support performance of the system.In practice,semi-analytical and empirical approaches are often used to determine the ground support elements in burst-prone areas.Semi-analytical methods first evaluate the support demand in burst risk zones and then select support elements according to their laboratory test results.Alternatively,empirical methods determine the ground support elements according to the locally established empirical rating scheme,which usually ranks the support capacities of various support systems based on ground support conditions and damage conditions.The outcomes of this study can provide insights into ground support strategies and assist the mining industry to develop effective coal burst control technologies. | Chunchen Wei Chengguo Zhang Ismet Canbulat Zhengyang Song Lianpeng Dai | 2022 | International Journal of Coal Science & Technology2022，9，1： | 1 |
| 19 | Optimization of microbial cell factories for astaxanthin production: Biosynthesis and regulations, engineering strategies and fermentation optimization strategies显示文摘The global market demand for natural astaxanthin is rapidly increasing owing to its safety,the potential health benefits,and the diverse applications in food and pharmaceutical industries.The major native producers of natural astaxanthin on industrial scale are the alga Haematococcus pluvialis and the yeast Xanthopyllomyces dendrorhous.However,the natural production via these native producers is facing challenges of limited yield and high cost of cultivation and extraction.Alternatively,astaxanthin production via metabolically engineered non-native microbial cell factories such as Escherichia coli,Saccharomyces cerevisiae and Yarrowia lipolytica is another promising strategy to overcome these limitations.In this review we summarize the recent scientific and biotechnological progresses on astaxanthin biosynthetic pathways,transcriptional regulations,the interrelation with lipid metabolism,engineering strategies as well as fermentation process control in major native and non-native astaxanthin producers.These progresses illuminate the prospects of producing astaxanthin by microbial cell factories on industrial scale. | Mostafa Basiony Liming Ouyang Danni Wang Jiaming Yu Liming Zhou Mohan Zhu Xuyuan Wang Jie Feng Jing Dai Yijie Shen Chengguo Zhang Qiang Hua Xiuliang Yang Lixin Zhang | 2022 | Synthetic and Systems Biotechnology2022，7，2： | 1 |
| 20 | Approximation of the tail probability of randomly weighted sums and applications显示文摘 | Zhang Yi Shen Xinmei Weng Chengguo | 2009 | Stochastic Processes and their applications2009，119，： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员