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| 1 | Parameters analysis of shearer drum loading performance显示文摘Three drums with different helical angles(15°,20°,and 25°) were developed to investigate improved loading performance of the shearer drum.Nine trials were performed at different drum rotation speeds(80,100,and 120 r/min) and different haulage speeds(1.5,2.0,and 2.5 m/min) in an orthogonal test design.Loaded coal quantity and cutting power of the drum were the responses measured under the different conditions.The effect of the parameters was determined by means of the extreme difference method.The significance of the effects was determined by analysis of variance.The results indicate that the effect from changes in the helical vane on loading performance of the drum is the largest in magnitude.The haulage speed has the least affect on loading performance.The helical angle has the least affect on cutting power of the drum.Haulage speed has the largest affect on the cutting power of the drum. | Liu Songyong Du Changlong Zhang Jiajia Jiang Hao | 2011 | Mining Science and Technology2011，21，5： | 8 |
| 2 | Active source monitoring at the Wenchuan fault zone:coseismic velocity change associated with aftershock event and its implication显示文摘With the improvement of seismic observation system, more and more observations indicate that earthquakes may cause seismic velocity change. However, the amplitude and spatial distribution of the velocity variation remains a controversial issue. Recent active source monitoring carried out adjacent to Wenchuan Fault Scientific Drilling(WFSD) revealed unambiguous coseismic velocity change associated with a local Ms5.5 earthquake. Here, we carry out forward modeling using two-dimensional spectral element method to further investigate the amplitude and spatial distribution of observed velocity change. The model is well constrained by results from seismic reflection and WFSD coring. Our model strongly suggests that the observed coseismic velocity change is localized within the fault zone with width of *120 m rather than dynamic strong ground shaking. And a velocity decrease of *2.0 %within the fault zone is required to fit the observed travel time delay distribution, which coincides with rock mechanical experiment and theoretical modeling. | Wei Yang Hongkui Ge Baoshan Wang Jiupeng Hu Songyong Yuan Sen Qiao | 2014 | Earthquake Science2014，27，6： | 6 |
| 3 | Initial movement of the Karakorum Fault in western Tibet:constraints from SHRIMP U-Pb dating of zircons显示文摘The Karakorum Fault zone(KFZ)plays an important role in understanding the formation,evolvement and deformation of the Tibetan Plateau.The high-T dextral shearing metamorphic rocks,e.g.,mylonites or mylonitized gneisses-granites,locally crop out along the southeastern part of the KFZ in the Ayila Ri’gyüRange area.The SHRIMP U-Pb dating of the syn-kinematic crystallized zircons indicates that the initial age of the KFZ is^27 Ma,~10 Ma older than previous results.The extensive high-T dextral shearing along the KFZ started at least at 27-20 Ma,accompanied by the syn-kinematic emplacement of leuco-granites.Deformation and concomitant fluid circulation during shearing most likely occurred as early as at 25-13 Ma.The KFZ probably grew from southeast to northwest along the fault as a result of continuous convergence between the India plate and Eurasia plate. | LI HaiBing Franck VALLI LIU DunYi XU ZhiQin YANG JingSui Nicolas ARNAUD Paul TAPPONNIER Robin LACASSIN CHEN SongYong QI xuexiang | 2007 | Chinese Science Bulletin2007，52，8： | 6 |
| 4 | Numerical study of coarse coal particle breakage in pneumatic conveying显示文摘 | Jiawei Zhou Yu Liu Changlong Du Songyong Liu Jianping Li | 2018 | Particuology2018，16，3： | 6 |
| 5 | Model test of helical angle effect on coal loading performance of shear drum显示文摘The work presented in this paper focuses on improving coal loading performance of shear drum.Employing the similarity theory,we carried out a dimensional analysis of the correlation parameters which influence coal loading performance of shear drum.On the basis of similarity criterion,proportional relationship between the model and the prototype was taken on the condition of taking 1/3 as the similarity coefficient.Besides taking 1600 mm drum as the prototype,four helical angle models of shearer drums(15°,18°,21°,24°) were developed.Simultaneously,based on an established cutting test-bed,coal loading performance tests for the four drums were carried out at the same drum rotational and haulage speeds.After analyzing the data of coal-loading performance and torque,we concluded that:both the coal loading performance and torque vary along the track of the parabola with the opening side facing downwards;the best coal loading performance arises when the helical angle is at 19.3°,while the biggest torque arises at 22.1°;and the coal loading performance had nonlinear relationship with the torque. | Kuidong Gao Changlong Du Songyong Liu Lin Fu | 2012 | International Journal of Mining Science and Technology2012，22，2： | 4 |
| 6 | Rock Breaking Performance of a Pick Assisted by High-pressure Water Jet under Different Configuration Modes显示文摘In the process of rock breaking, the conical pick bears great cutting force and wear, as a result, high-pressure water jet technology is used to assist with cutting. However, the effect of the water jet position has not been studied for rock breaking using a pick. Therefore, the models of rock breaking with different configuration modes of the water jet are established based on SPH combined with FEM. The effect of the water jet pressure, distance between the jet and the pick bit, and cutting depth on the rock breaking performance as well as a comparison of the tension and compression stress are studied via simulation; the simulation results are verified by experiments. The numerical and experimental results indicate that the decrease in the rates of the pick force obviously increases from 25 MPa to 40 MPa, but slowly after 40 MPa, and the optimal distance between the jet and the pick bit is 2 mm under the JFP and JSP modes. The JCP mode is proved the best, followed by the modes of JRP and JFP, and the worst mode is JSP. The decrease in the rates of the pick force of the JCP, JRP, JFP, and JSP modes are up to 30.96%, 28.96%, 33.46%, 28.17%, and 25.42%, respectively, in experiment. Moreover, the JSP mode can be regarded as a special JFP model when the distance between the pick-tip and the jet impact point is 0 mm. This paper has a dominant capability in introducing new numerical and experimental method for the study of rock breaking assisted by water jet and electing the best water jet position from four different configuration modes. | LIU Songyong LIU Xiaohui CHEN Junfeng LIN Mingxing | 2015 | Chinese Journal of Mechanical Engineering2015，28，3： | 3 |
| 7 | Applicability of the Welch method for examining self-noise level parameters for broadband seismometers显示文摘Seismometer self-noise levels were determined using Sleeman's three-sensor method in combination with the Welch method for different parameter combinations. The self-noise levels decreased with the increasing segment window length, which is equivalent to the subwindow length, and with the increasing segment overlap rate for different frequency points at a fixed band. After the statistical examination of 9800 different parameter combinations, a zone of reasonable self-noise calculation parameter combinations was identified. Reasons for the unsuitability of certain parameter combinations were explored with respect to their distortion of the seismometer's self-noise levels. | Li Xiaojun Yang Dake Xie Jianbo Ma Jiemei Yuan Songyong Xu Weiwei Zhao Jianhe Li Dongsheng | 2015 | Geodesy and Geodynamics2015，6，3： | 3 |
| 8 | Helium Isotopic Composition of the Songduo Eclogites in the Lhasa Terrane,Tibet: Information from the Deep Mantle显示文摘Helium isotopic compositions are considered to be ideal tracers to identify whether mantle materials have been added to crustal rocks or fluids.In this paper,we present the helium isotopic compositions of the Songduo eclogites in the Lhasa terrane,Tibet.We found that garnet and omphacite in the eclogites have different helium retention characteristics.The 4He content of most omphacite grains are about 10–20 times of that of garnet,suggesting that omphacite has a higher ability to capture 4He than garnet.Similarly,there is about 10–20 times difference in 3He content between omphacite and garnet in the same eclogite samples.The 3He/4He ratios of garnet and omphacite in these rocks range from 0.27 to 0.60 Ra(relative to the modern air 3He/4He ratio,1.4×10^-6).These ratios are within the range of both mantle-and crust-derived helium,suggesting mixed sources.The Songduo eclogites have much higher3He/4He ratios than those observed in the Dabie eclogites of eastern China.Such high ratios are typically thought to be associated with deep mantle sources.We cautiously conclude that deep mantle materials might have been involved during the formation of the Songduo eclogites. | Zhaoli Li Jingsui Yang Tianfu Li Songyong Chen | 2019 | Journal of Earth Science2019，30，3： | 2 |
| 9 | Robust Hco control of discrete switched systems with time delay 显示文摘 | SONGYong FAN Jian FEI Minrui | 2008 | Appl MathComput2008，205，1： | 1 |
| 10 | Unusual mantle mineral group from chromitite orebody Cr- 11 in Luobusa opbiolitc of Yarlung-Zangbo suture zone, Tibet显示文摘 | Xu Xiangzhen Yang Jingsui Chen Songyong | 2009 | Journal of Earth Science2009，20，： | 1 |
| 11 | Western medicine treatment of functional dyspepsia randomized controlled trials 显示文摘 | systematic reviews Liu Jiali Zhang Yijie Songyong Xi | 2012 | Chinese Journal of Evidence-Based Medicine2012，11，12： | 1 |
| 12 | Rock Breaking of Conical Cutter with Assistance of Front and Rear Water Jet显示文摘 | Songyong Liu Zenghui Liu Xinxia Cui Hongxiang Jiang | 2014 | Tunnelling and Underground Space Technology incorporating Trenchless Technology Research2014，，： | 1 |
| 13 | The Characteristics of Yongzhu–Guomang Lake Ophiolitic Melange in Bangong-Nujiang Suture, Xizang(Tibet),China显示文摘Yongzhu–Guomang Lake ophiolitic melange exposed about 100 km with large scale and complete ophiolitic uint in Xainza County,Xizang(Tibet).It is connected with Nam Lake,Kaimeng ophiolitic mélange to the east。 | CHEN Songyong YANG Jingsui WU Yong WU Weiwei ZHANG Cai | 2016 | Acta Geologica Sinica(English Edition)2016，90，S1： | 0 |
| 14 | 利用断裂带首波获得2010年Mw6.9玉树地震断裂带的速度差异显示文摘断裂带首波(FZHW)沿着存在岩性差异的断裂面传播,为断裂带特征研究提供了高精度的信息。本文利用2010年4月13日(世界时)Mw6.9玉树地震的余震资料对甘孜-玉树断裂带(GYF)进行了定量分析。与直达P波波形相比,断裂带首波具有振幅低、周期长和初至极性相反等特征。结隆盆地是一个拉张性盆地且被隆宝湖填充,在盆地边缘两侧断裂带附近的4个台站观测到了断裂带首波。直达P波和断裂带首波之间的走时差随着沿断裂面的距离呈线性增加,相应的速度差异为5%~8%,但我们没有观测到走时差随震源深度的变化,结果显示拉张盆地形成了一个地表浅层几千米的低速区。主震震中往东南方向的速度差异很小(1%~3%),与野外现场调查和地震成像的结果较一致。 | wei yang zhigang peng baoshan wang zefeng li songyong yuan 杨微(译) 朱玉萍(校) | 2016 | 世界地震译丛2016，47，3： | 0 |
| 15 | Tectonic Evolution of the Dongbo Ophiolite in Western Yarlung Zangbo Suture Zone, Xizang(Tibet)显示文摘The Dongbo ophiolite in the western part of the Yarlung-Zangbo suture zone in southern Tibet rests tectonically on the middle-late Triassic and Cretaceous flysch units,and consist mainly of peridotites,mafic dikes, | LIU Fei YANG Jingsui Yildirim DILEK LIAN Dongyang XU Zhiqin ZHANG Li XIE Yanxue CHEN Songyong HUANG Jian | 2016 | Acta Geologica Sinica(English Edition)2016，90，S1： | 0 |
| 16 | 运用26s定点持续脉动源的同步洲际地震台网显示文摘地震学的定量研究需要精确的仪器时钟。最近的研究进展表明,可利用背景噪声来检测存在软件/硬件问题的海底地震仪(OBS)或陆上地震仪的台站时钟漂移情况。在稀疏的全球地震台网尺度下,从背景噪声中提取的短周期(<20s)瑞利波信号相对较弱,应用时受到限制。位于几内亚湾的持续稳定的26s固定脉动源,辐射出较强的噪声信号,可以被全球台站记录到,因而可以利用它同步加大距离台站间的时钟漂移情况。本文基于噪声互相关方法,我们尝试运用该26s的脉动信号检测非洲、北美和欧洲等地区地震台站的时钟精度。结果发现TAM,OBN台站的时钟在2002~2009年间相对稳定;CCM台站的时钟在2006~2009年间出现了约1s偏差,并且时钟的漂移量不稳定;KOWA台站的时钟漂移从2012年10月的约150s最大上升至2013年1月的约500s。本文将得到的结果与Stehly等(2007)利用背景噪声方法得到的结果、以及远震P波初至到时残差进行了对比分析。利用本文提出的方法,通过与经精确校正过的陆地台站同步,可校正北大西洋海底地震仪的时钟。 | Yingjie Xia Sidao Ni Xiangfang Zeng Jun Xie Baoshan Wang Songyong Yuan 檀玉娟(译) 王宝善(校) | 2017 | 世界地震译丛2017，48，3： | 0 |
| 17 | Site survey and assessment for the planned seismogeodynamic monitoring network in the Republic of Armenia显示文摘We present results of a detailed analysis of data obtained from seismic geodynamic field studies conducted at proposed sites for the development of advanced seismic monitoring stations in the Republic of Armenia.These studies aim to determine the background seismic and geodynamic noise level around such sites.Finally,based on the received data and international standards,nine survey points were classified into respective classes according to their noise level.We also calculated minimum significant earthquake magnitude detectable by the proposed seismic network in different regions of Armenia and mapped it based on recorded regional earthquakes.The resulting map indicates that the proposed seismic monitoring network will provide homogenous initial data for the various seismically active regions of the territory of the Republic of Armenia. | Jon Karapetyan Li Li Eduard Geodakyan Songyong Yuan Roza Karapetyan | 2022 | Earthquake Science2022，35，6： | 0 |
| 18 | New Explorations of Laboratory and On-site Testing of Broadband Seismographs in China显示文摘According to different testing purposes, methods and available environmental conditions, the seismograph testing can be divided into laboratory and on-site testing, respectively. The testing of the seismograph's key parameters and other concerning technical specifications are well described in guide documents(China Earthquake Administration, 2017). This includes seismometer sensitivity, linearity and clip levels based on the shake table test, as well as the seismometer natural period, damping constant based on electrical calibration(Wang Guangfu,1986; Ple?inger A.,1993) and instrumental self-noise collocation estimation(Holcomb L.G., 1989; Sleeman R. et al., 2006). However, with the development of seismic observation technology, many new requirements for the performance evaluation of seismographs have been put forward, and new testing items and methods have emerged. | XIE Jianbo YANG Dake LI Xiaojun YUAN Songyong TONG Wanglian MA Jiemei XU Weiwei DING Lisha YE Shishan | 2019 | Earthquake Research in China2019，33，1： | 0 |
| 19 | Development of the Sumdo Suture in the Lhasa Block, Tibet, China显示文摘The Qinghai–Tibet plateau is a composite continental fragment formed by collision of multiple terranes and island arcs.The Lhasa terrane,which is located in the central part of the plateau,is bounded by the Yarlung–Zangbo suture to the south and Bangong-Nujiang suture to the north.An E–W–trending belt of(ultra)-high pressure eclogite was discovered in the Sumdo region of the Lhasa terrane.Careful field studies combined with petrological,geochemical and isotopic analyses show that the Sumdo eclogites mark a Carboniferous–Permian suture zone,at least 100 km long,containing ophiolite fragments,eclogites and Indosinian post–orogenic granitoids.This suture divides the Lhasa block into a northern and southern segment.Sumdo eclogite occurs about 200 km east of Lhasa city,and extends over 100km in an E–W direction.Sumdo eclogites were accompanied by garnet amphibolite and plagioclaseamphiboliteformedbyretrograde metamorphism of the eclogites.The eclogites were derived from oceanic basalts.LA–ICPMS U–Pb dating of zircon from the Sumdo eclogites indicates a Permian metamorphic age(260–270 Ma)and a Carboniferous protolith age of 303±4.8 MaThe ophiolite fragments in the Sumdo suture zone are composed of the ultramafic rocks,MORB–type basalt,OIB–type basalt and island arc basaltic andesite,some of which are intruded by post-collisional granites.The ultramafic body,a typical tectonic block in the suture zone,is completely serpentinized.Its geochemical features suggest that it is composed of harzburgite,typical of depleted mantle peridotite.The MORB and OIB–type basalts crop out in the Chasagang Formation,and the basaltic andesite crops out in the Leilongku Formation,both of which make up the Sumdo Group.Zircons from the OIB–type basalt with typical magmatic characteristics yield an average U–Pb age of306(95%)Ma,suggesting formation in a Paleo–Tethyan basin in the Carboniferous.U–Pb dating of zircon from the basaltic andesites yielded a concordant age of 265±3.1Ma,similar to the metamorphic age(266–270 Ma)of the eclogites,suggesting formation during subduction of the oceanic crust.Indosinian granodiorite with an age of194±4.3 Ma crops out north of the Sumdo suture.These granodiorites are similar to the late Indochina granites in the Lhasa block,and most likely formed during continent-arc collision or during closure of the Paleo-Tethyan Ocean.A four–stage model for the evolution of the Sumdo Paleo–Tethyan suture is proposed:1)From the Ordovician to the Devonian Gondwanaland was part of an epicontinental sea;2)In the Carboniferous,continental rifting produced a local basin,which then evolved into a Paleo-Tethyan ocean basin,dividing the Lhasa block into two segments;3)From the Permian to the early Triassic,Paleo-Tethyan oceanic crust was subducted northward and;4)In the middle Triassic and early Jurassic,the two fragments collided to form the modern Lhasa block. | CHEN Songyong YANG Jingsui ZHANG Cong XU Xiangzhen LI Zhaoli | 2017 | Acta Geologica Sinica(English Edition)2017，91，S1： | 0 |
| 20 | Teleseismic body waves extracted from ambient noise cross correlation between F-net and Chin Array phase Ⅱ显示文摘The vertical-vertical noise cross-correlation functions(NCFs)between two seismic arrays,the Japan F-net and Chin Array phase Ⅱ,are calculated using continuous recordings during 2013-2016.After array interferometry to obtain bin stacked NCFs,clear body waves are retrieved at different period bands.Teleseismic direct P waves for distance 15-40 degrees are observed between short period 3-10 s while core reflected PcP/ScS waves are more obvious for longer period 30-60 s.The signal-to-noise-ratio(SNR)of the short period P waves reaches its highest point with bin widths around 20 km while SNRs of PcP and ScS increase slowly with bin width.All those body waves demonstrate clear directivity with strong signals traveling from the east.The time-lapse SNR variations for the PcP and ScS show correlation with the occurrence of major earthquakes,while the P-wave SNR demonstrates seasonal variations with additional contribution from major earthquakes.The present results suggest teleseismic body waves can be retrieved through bin stacking,though further processing is still necessary to obtain finer waveforms such as P wave triplications. | Lin Deng Weitao Wang Fang Wang Songyong Yuan | 2022 | Earthquake Research Advances2022，2，1： | 0 |
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