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| 1 | Studies on the evolution process of rockbursts in deep tunnels显示文摘This paper focuses on the evolution processes of different types of rockbursts occurring in deep tunnels. A series of laboratory tests and in-situ monitoring in deep tunnels excavated by tunnel boring machine (TBM) and drill-and-blast (D&B) method have been conducted to understand the mechanisms and processes of the evolution of different types of rockbursts, including strain rockburst, strain-structure slip rockburst, immediate rockburst and time-delayed rockburst. Three different risk assessment methods are proposed to evaluate the intensity and potential failure depth of rockbursts. These methods can be applied before excavation and the results can be updated according to the real-time information during excavation. Two micro-seismicity based real-time warning systems have been established for predicting various intensities of rockbursts, such as slight, moderate, intensive and extremely intensive rockbursts. Meanwhile, the probability and intensity of the rockburst are also given. The strategy for excavation and support design has been suggested for various intensities of rockbursts before excavation. The strategy for dynamic control of the rockburst evolution process is also proposed according to the monitoring results. The methodology has been successfully applied to rockburst risk reduction for deep tunnels at Jinping II hydropower project. The results have illustrated the applicability of the proposed methodology and techniques concerning rockbursts. | Xiating Feng Bingrui Chen Shaojun Li Chuanqing Zhang Yaxun Xiao Guangliang Feng Hui Zhou Shili Qiu Zhouneng Zhao Yang Yu Dongfang Chen Huajun Ming | 2012 | Journal of Rock Mechanics and Geotechnical Engineering2012，4，4： | 11 |
| 2 | Passive seismic experiment and ScS wave splitting in the southwestern subbasin of South China Sea显示文摘The seismic experiment of 3D array of OBS in the southwestern sub-basin of the South China Sea(SCS) is briefly introduced in this paper.The data analysis of broadband OBS shows that totally 93 earthquakes with magnitude of Ms 6.0-6.9 and 10 earthquakes with magnitude above Ms 7.0 were recorded in high quality during this experiment,especially the catastrophic earthquake Ms 9.0 occurred in the east sea area of Japan on March 11,2011.The anisotropy parameters inversion of ScS wave of four events above Ms 7.0 indicates that the fast direction of shear wave is N58°E parallel to the ceased spreading ridge of the southwestern sub-basin of SCS(the slow direction is S35°E perpendicular to the spreading ridge),which means the spreading ridge is under compressing stress at present and the cessation of seafloor spreading is related to such stress field as well. | RUAN AiGuo LI JiaBiao LEE ChaoShing QIU XueLin PAN ShaoJun | 2012 | Chinese Science Bulletin2012，57，25： | 9 |
| 3 | A high-quality genome sequence of alkaligrass provides insights into halophyte stress tolerance显示文摘Alkaligrass(Puccinellia tenuiflora) is a monocotyledonous halophytic forage grass widely distributed in Northern China. It belongs to the Gramineae family and shares a close phylogenetic relationship with the cereal crops, wheat and barley. Here, we present a high-quality chromosome-level genome sequence of alkaligrass assembled from Illumina, Pac Bio and 10× Genomics reads combined with genome-wide chromosome conformation capture(Hi-C) data. The ~1.50 Gb assembled alkaligrass genome encodes 38,387 protein-coding genes, and 54.9% of the assembly are transposable elements, with long terminal repeats being the most abundant. Comparative genomic analysis coupled with stress-treated transcriptome profiling uncovers a set of unique saline-and alkaline-responsive genes in alkaligrass. The high-quality genome assembly and the identified stress related genes in alkaligrass provide an important resource for evolutionary genomic studies in Gramineae and facilitate further understanding of molecular mechanisms underlying stress tolerance in monocotyledonous halophytes. The alkaligrass genome data is freely available at http://gffzz284c18d2de364501hbovwpuo55n9k669u.ffgz.tsg.suse.edu.cn/data/alkaligrass.html. | Wenting Zhang Jie Liu Yongxue Zhang Jie Qiu Ying Li Baojiang Zheng Fenhong Hu Shaojun Dai Xuehui Huang | 2020 | Science China(Life Sciences)2020，63，9： | 8 |
| 4 | Estimation of the three-dimensional in situ stress field around a large deep underground cavern group near a valley显示文摘Understanding three-dimensional(3D)in situ stress field is of key importance for estimating the stability of large deep underground cavern groups near valleys.However,the complete 3D in situ stress fields around large deep underground cavern groups are difficult to determine based on in situ stress data from a limited number of measuring points due to the insufficient representativeness and unreliability of such measurements.In this study,an integrated approach for estimating the 3D in situ stress field around a large deep underground cavern group near a valley is developed based on incomplete in situ stress measurements and the stress-induced failures of tunnels excavated prior to the step excavation of the cavern group.This integrated approach is implemented via four interrelated and progressive basic steps,i.e.inference of the regional tectonic stress field direction,analyses of in situ stress characteristics and measurement reliability,regression-based in situ stress field analysis and reliability assessment,and modified in situ stress field analysis and reliability verification.The orientations and magnitudes of the 3D in situ stress field can be analyzed and obtained at a strategic level following these four basic steps.First,the tectonic stress field direction around the cavern group is deduced in accordance with the regional tectonic framework and verified using a regional crustal deformation velocity map.Second,the reliability of the in situ stress measurements is verified based on the locations and depths of stressinduced brittle failures in small tunnels(such as exploratory tunnels and pilot tunnels)within the excavation range of the cavern group.Third,considering the influences of the valley topography and major geological structures,the 3D in situ stress field is regressed using numerical simulation and multiple linear regression techniques based on the in situ stress measurements.Finally,the regressed in situ stress field is further modified and reverified based on the stress-induced brittle failures of small tunnels and the initial excavation of the cavern group.A case study of the Shuangjiangkou underground cavern group demonstrates that the proposed approach is reliable for estimating the 3D in situ stress fields of large deep underground cavern groups near valleys,thus contributing to the optimization of practical excavation and design of mitigating the instability of the surrounding rock masses during step excavations. | Dingping Xu Xiang Huang Quan Jiang Shaojun Li Hong Zheng Shili Qiu Huaisheng Xu Yonghong Li Zhiguo Li Xingdong Ma | 2021 | Journal of Rock Mechanics and Geotechnical Engineering2021，13，3： | 6 |
| 5 | Probabilistic analysis of tunnel displacements based on correlative recognition of rock mass parameters显示文摘Displacement is vital in the evaluations of tunnel excavation processes,as well as in determining the postexcavation stability of surrounding rock masses.The prediction of tunnel displacement is a complex problem because of the uncertainties of rock mass properties.Meanwhile,the variation and the correlation relationship of geotechnical material properties have been gradually recognized by researchers in recent years.In this paper,a novel probabilistic method is proposed to estimate the uncertainties of rock mass properties and tunnel displacement,which integrated multivariate distribution function and a relevance vector machine(RVM).The multivariate distribution function is used to establish the probability model of related random variables.RVM is coupled with the numerical simulation methods to construct the nonlinear relationship between tunnel displacements and rock mass parameters,which avoided a large number of numerical simulations.Also,the residual rock mass parameters are taken into account to reflect the brittleness of deeply buried rock mass.Then,based on the proposed method,the uncertainty of displacement in a deep tunnel of CJPL-II laboratory are analyzed and compared with the in-situ measurements.It is found that the predicted tunnel displacements by the RVM model closely match with the measured ones.The correlations of parameters have significant impacts on the uncertainty results.The uncertainty of tunnel displacement decreases while the reliability of the tunnel increases with the increases of the negative correlations among rock mass parameters.When compared to the deterministic method,the proposed approach is more rational and scientific,and also conformed to rock engineering practices. | Minzong Zheng Shaojun Li Hongbo Zhao Xiang Huang Shili Qiu | 2021 | Geoscience Frontiers2021，12，4： | 6 |
| 6 | A local homogenization approach for simulating the reinforcement effect of the fully grouted bolt in deep underground openings显示文摘Fully grouted bolts are a key component of the support system for underground openings.Although considerable effort has been made in the simulation of the reinforcement effect of the fully grouted bolts on the rock masses surrounding underground openings,most of the work has limited significance since the structural element approach is used.This study proposes a local homogenization approach(L-H approach)that integrates elastoplastic mechanics,composite mechanics,and analytical approaches with numerical simulation to effectively simulate the reinforcement effect of the fully grouted bolt on deep surrounding rock masses.In the L-H approach,the representative volume of bolted rock mass(RVBRM)with a fully grouted bolt is established based on the original mesh model utilized in the rockbolt element approach.The RVBRM is a regular quadrangular prism with a cross-sectional size equal to the bolt spacing and a length equal to the bolt length.The RVBRM is homogenized by the L-H approach from a unidirectional bolt-reinforced composite into a homogeneous transversely isotropic medium whose mechanical properties are described by a new transversely isotropic elastoplastic model.The L-H parameters for the RVBRM are obtained using analytical approaches,composite mechanics,and known parameters of the rock mass and bolt.Using the L-H approach,the reinforcement effect of the fully grouted bolt on the bolted rock specimen and the surrounding rock mass in Jinping II Diversion Tunnel#2 with a depth greater than 2000 m is simulated.The results show that the predictions of the L-H approach are more in agreement with the physical model results of bolted rock specimen and provide a more realistic response of the bolted surrounding rock mass.The L-H approach demonstrates that fully grouted bolts with common bolt spacings and diameters substantially enhance the elastic modulus,shear strength,and tensile strength of the rock mass in the direction of the bolt axis. | Dingping Xu Xiuyang Liu Quan Jiang Shaojun Li Yangyi Zhou Shili Qiu Fei Yan Hong Zheng Xiang Huang | 2022 | International Journal of Mining Science and Technology2022，32，2： | 3 |
| 7 | Methane production from rice straw carbon in five different methanogenic rice soils:rates,quantities and microbial communities显示文摘The input of organic substances(e.g.,rice straw)in rice field soils usually stimulates the production and emission of the greenhouse gas methane(CH4).However,the amount of CH4 derived from the applied rice straw,as well as the response of bacterial and archaeal communities during the methanogenic phase,are poorly understood for different rice field soils.In this study,samples of five different rice soils were amended with 13^C-labeled rice straw(RS)under methanogenic conditions.Immediately after RS addition,the RS-derived CH4 production rates were higher in soils(Uruguay,Fuyang)that possessed a stronger inherent CH4 production potential compared with other soils with lower inherent potentials(Changsha,the Philippines,Vercelli).However,soils with higher inherent potential did not necessarily produce higher amounts of CH4 from the RS applied,or vice versa.Quantitative PCR showed copy numbers of both bacteria and methanogens increased in straw-amended soils.High-throughput sequencing of 16 S rRNA genes showed distinct bacterial communities among the unamended soil samples,which also changed differently in response to RS addition.Nevertheless,RS addition generally resulted in all the rice field soils in a relative increase of primary fermenters belonging to Anaerolineaceae and Ruminococcaceae.Meanwhile,RS addition also generally resulted in a relative increase of Methanosarcinaceae and/or Methanocellaceae.Our results suggest that after RS addition the total amounts of RSderived CH4 are distinct in different rice field soils under methanogenic conditions.Meanwhile,there are potential core bacterial populations that are often involved in primary fermentation of RS under methanogenic conditions. | Quan Yuan Xiaozhen Huang Junpeng Rui Shaojun Qiu Ralf Conrad | 2020 | Acta Geochimica2020，39，2： | 2 |
| 8 | Trace metal contamination in soils from mountain regions across China:spatial distribution,sources,and potential drivers显示文摘Trace metal contamination in soils is a threat with an uncertain limit to maintain planet safety,and the issue of trace metal contamination in mountain soils is still of low concerned.In this study,we assessed the contamination of six trace metals(Cd,Cr,Cu,Ni,Pb,and Zn)in mountain soils across China and deciphered the potential drivers of their spatial distribution.The results showed that concentrations of Cd and Pb decreased significantly with soil depth,and their concentrations were markedly higher in northwest,south,and southwest China than elsewhere.Among the metals,Cd was the priority for control with moderate to heavy contamination,followed by Pb,whereas the other metals did not show evident contamination.The altitudinal pattern and isotopic tracing revealed that the significant enrichment and marked contamination of Cd and Pb in surface soils were primarily attributed to deposition through long-range transboundary atmospheric transport and condensation.Ore mining,nonferrous smelting,and coal and fuel combustion were identified as primary anthropogenic sources of the Cd and Pb.Soil organic matter content,pH,and soil forming processes directly determined the accumulation of trace metals in the soils,and orographic effects,including local climate,vegetation composition,and canopy filtering,regulated the spatial distribution of the metals.This study highlights the significance of soil Cd contamination in mountains,which are considered of low concern,and suggests that long-term monitoring of trace metal contamination is necessary to improve biogeochemical models that evaluate the responses of the mountain critical zone to future human-and climate-induced environmental changes. | Haijian Bing Shaojun Qiu Xin Tian Jun Li He Zhu Yanhong Wu Gan Zhang | 2021 | Soil Ecology Letters2021，3，3： | 2 |
| 9 | Study on proposed value of catanchor co-efficient for large prestressed pier显示文摘 | Huang Zhenke Fu Shaojun Qiu Huanfeng ChenShenghong | 2011 | Applied Me-chanics and Materials2011，9093，： | 1 |
| 10 | Fertilizer recommendation for maize in China based on yield response and agronomic efficiency显示文摘 | Xinpeng Xu Ping He Mirasol F. Pampolino Adrian M. Johnston Shaojun Qiu Shicheng Zhao Limin Chuan Wei Zhou | 2014 | Field Crops Research2014，，： | 1 |
| 11 | Anazido ester plasticizer,1,3-di(azidoacetoxyl)-2,2-di(azidomethyl)propane (PEAA):Synthesis,characterization and thermal properties显示文摘 | Qiu Shaojun Fan Huiqing Gao Chao | 2006 | Propellants Explosives Pyrotechnics2006，31，： | 1 |
| 12 | Nutrient requirements for maize in China based on QUEFTS analysis显示文摘 | Xinpeng Xu Ping He Mirasol F. Pampolino Limin Chuan Adrian M. Johnston Shaojun Qiu Shicheng Zhao Wei Zhou | 2013 | Field Crops Research2013，，： | 1 |
| 13 | Estimating nutrient uptake requirements for wheat in China显示文摘 | Limin Chuan Ping He Jiyun Jin Shutian Li Cynthia Grant Xinpeng Xu Shaojun Qiu Shicheng Zhao Wei Zhou | 2013 | Field Crops Research2013，，： | 1 |
| 14 | Long-term effects of potassium fertilization and straw return on soil potassium levels and crop yields in north-central China显示文摘 | Zhao Shicheng He Ping Qiu Shaojun | 2014 | Field Crops Research2014，169，： | 1 |
| 15 | Improv-ement in waveform of switching-point-preset SPWM Inverters显示文摘 | Xie Shaojun Qiu Weihong Yan Yangguang | 1995 | Trans of Nanjing University of Aeronautics & Astronautics1995，12，1： | 1 |
| 16 | Nutrient requirements for maize in China based on QUEFTS analysis显示文摘 | Xinpeng Xu Ping He Mirasol F. Pampolino Limin Chuan Adrian M. Johnston Shaojun Qiu Shicheng Zhao Wei Zhou | 2013 | Field Crops Research2013，，： | 1 |
| 17 | Estimating nutrient uptake requirements for wheat in China显示文摘 | Limin Chuan Ping He Jiyun Jin Shutian Li Cynthia Grant Xinpeng Xu Shaojun Qiu Shicheng Zhao Wei Zhou | 2013 | Field Crops Research2013，，： | 1 |
| 18 | An azido ester plasticizer, 1,3-di(azidoacetoxy)-2,2-di- (azidomethyl) propane(PEAA): Synthesis, characterization and thermal properties显示文摘 | Qiu Shaojun Fan Huiqing | 2006 | Propellant Explosives Pyrotechnics2006，31，3： | 1 |
| 19 | An azido ester plasticizer,1,3-di(azidoacetoxy)-2,2-di(azidomethyl) propane (PEAA):synthesis,characterization and thermal properties显示文摘 | Qiu Shaojun Fan Huiqing Gao Chao | | 0，，03： | 1 |
| 20 | Synthesis and dielectric properties of the Aurivillius oxide BaBi 4 Ti 4 O 15 by the Pechini method显示文摘 | Pinyang Fang Zengzhe Xi Wei Long Xiaojuan Li Shaojun Qiu | 2014 | Journal of Sol-Gel Science and Technology2014，，： | 1 |
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