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| 1 | Studies on classification,criteria and control of rockbursts显示文摘This paper attempts to present the findings involving rockbursts classification,rockburst failure criteria,and related control measures.Experimental investigations were performed using the strainburst testing machine and impact-induced rockburst testing machine.According to the stress paths and experimental methods,rockbursts were classified into two major groups,i.e.the strainbursts and impact-induced bursts.The mechanisms and criteria of rockburst obtained from experimental investigations were discussed.Then,the developments of constant-resistance and large-deformation bolt(CRLDB),which can adapt itself to the external loading at a constant resistance by elongating continually,were introduced.The deformation energy of country rocks with large deformation can be absorbed by CRLDBs.Finally,the principles and the experimental results for control and prevention of rockburst using the CRLDBs were presented. | Manchao He Hongman Xia Xuena Jia Weili Gong Fei Zhao Kangyuan Liang | 2012 | Journal of Rock Mechanics and Geotechnical Engineering2012，4，2： | 21 |
| 2 | An experimental investigation on acoustic emission characteristics of sandstone rockburst with different moisture contents显示文摘Rockburst occurred frequently during deep mining in China. The mechanism of rockburst is very complicated and related to many factors. In order to investigate the influence of moisture contents of rockmass on rockburst, we conducted a series of laboratory rockburst experiments of sandstone under three different moisture contents by the Modified True-Triaxial Apparatus (MTTA),in which the acoustic emission (AE) system was employed to monitor the internal damage of rock mass. A high-speed video camera was utilized to record the detail of rockburst. Based on the experimental results, the AE characteristics, such as AE count,AE energy, and AE frequency, were analyzed. The rockburst process, type, and indensity under different moisture contents were discussed. The research results show that with the increase of moisture contents, rock strength was soften, the elastic and the cumulative damage of the rock were reduced, resulting in a gradual decrease in AE cumulative counts and cumulative energy over the course of rockburst. This study provides an experimental basis and reference for better understanding to the rockburst mechanism and control. | SUN XiaoMing XU HuiChen ZHENG LianGe HE ManChao GONG WeiLi | 2016 | Science China(Technological Sciences)2016，59，10： | 7 |
| 3 | Dynamic analysis of granite rockburst based on the PIV technique显示文摘This paper describes the deep rockburst simulation system to reproduce the granite instantaneous rockburst process.Based on the PIV(Particle Image Velocimetry)technique,quantitative analysis of a rockburst,the images of tracer particle,displacement and strain fields can be obtained,and the debris trajectory described.According to the observation of on-site tests,the dynamic rockburst is actually a gas–solid high speed flow process,which is caused by the interaction of rock fragments and surrounding air.With the help of analysis on high speed video and PIV images,the granite rockburst failure process is composed of six stages of platey fragment spalling and debris ejection.Meanwhile,the elastic energy for these six stages has been calculated to study the energy variation.The results indicate that the rockburst process can be summarized as:an initiating stage,intensive developing stage and gradual decay stage.This research will be helpful for our further understanding of the rockburst mechanism. | Wang Hongjian Liu Da'an Gong Weili Li Liyun | 2015 | International Journal of Mining Science and Technology2015，25，2： | 6 |
| 4 | Breast cancer-specific serum peptide profiles显示文摘Early detection of breast cancer is paramount to successful clinical therapy. Yet, early-stage breast cancer lacks specific symptoms or biomarkers. With the emerging of the mass spectrometric (MS) -based signatures as biomarkers, we investigated breast cancer-related serum profile pattern through class prediction and independent validation, and used Fourier transfer MS to identify breast cancer signature. We now show a distinctive serum peptide pattern that discriminates breast cancer from healthy controls with 93.2% sensitivity and 95.4% specificity. m/z 5901.70 and 4465.74 of ion fragment of FPA and alpha1-antichymotrypsin are found in the signatures that predominantly discriminate breast cancer from healthy individuals. These novel findings identify an MS-based serum peptide pattern of breast cancer that may have direct clinical utility in future. | WANG Na WEN XinYu WANG Jie LI AiLing LI WeiHua LI Tao Li Yan ZHANG XueMin WANG HongXia YANG SongCheng ZHOU Tao GONG WeiLi TIAN YaPing HE Kun | 2009 | Chinese Science Bulletin2009，54，3： | 4 |
| 5 | Broadband terahertz wave generation from an epsilon-near-zero material显示文摘Broadband light sources emitting in the terahertz spectral range are highly desired for applications such as noninvasive imaging and spectroscopy.Conventionally,THz pulses are generated by optical rectification in bulk nonlinear crystals with millimetre thickness,with the bandwidth limited by the phase-matching condition.Here we demonstrate broadband THz emission via surface optical rectification from a simple,commercially available 19nmthick indium tin oxide(ITO)thin film.We show an enhancement of the generated THz signal when the pump laser is tuned around the epsilon-near-zero(ENZ)region of ITO due to the pump laser field enhancement associated with the ENZ effect.The bandwidth of the THz signal generated from the ITO film can be over 3 THz,unrestricted by the phasematching condition.This work offers a new possibility for broadband THz generation in a subwavelength thin film made of an ENZ material,with emerging physics not found in existing nonlinear crystals. | Wenhe Jia Meng Liu Yongchang Lu Xi Feng Qingwei Wang Xueqian Zhang Yibo Ni Futai Hu Mali Gong Xinlong Xu Yuanyuan Huang Weili Zhang Yuanmu Yang Jiaguang Han | 2021 | Light(Science & Applications)2021，10，1： | 4 |
| 6 | Numerical and safety considerations about the Daguangbao landslide induced by the 2008 Wenchuan earthquake显示文摘The 2008 Wenchuan earthquake resulted in a large number of fatalities and caused significant economic losses.Thousands of landslides,many of which are very large,were triggered by the earthquake.A majority of catastrophic landslides were distributed along the central Longmenshan fault system,at the eastern margin of the Tibetan Plateau.Some of the landslides resulted in sudden damming of rivers causing flooding,which in turn induced secondary sliding disasters.Among the most significant landslides,the Daguangbao landslide was the largest in volume with the maximum thickness.For this,a numerical model of the Daguangbao landslide,using the material point method(MPM),was developed to simulate the interaction of the seismic loads imposed on the slope.The numerical results then are compared with the post-earthquake profile.As a consequence of the landslide,a nearly vertical head scarp with a maximum height of about 700 m was generated.This is considered as a high risk situation that requires constant monitoring and evaluation.Finally,we propose a methodology based on Bayesian networks(BNs)to manage the risk associated with the stability of the rockwall at the Daguangbao landslide site. | Manchao He L.Ribeiro e Sousa AndréMüller Eurípedes Vargas Jr. R.L.Sousa C.Sousa Oliveira Weili Gong | 2019 | Journal of Rock Mechanics and Geotechnical Engineering2019，11，5： | 4 |
| 7 | Deformation and failure processes of kaolinite under tension:Insights from molecular dynamics simulations显示文摘As a primary constituent of soft rocks, kaolinite plays an important role in large deformations of underground structures, which usually leads to serious safety risks. This paper investigates the deformation and failure processes of kaolinite under tension using molecular dynamics simulations. Based on the atomistic scale of these deformation and failure processes and their stressstrain curves, Young's moduli and strengths in three crystal directions and the surface energy of the(001) plane were obtained,which were consistent with theoretical predictions. The number of broken bonds and their corresponding broken sequences were determined. The results of our study indicated that as more bonds break during tension, the initiation of crack led to a sharp decrease in stress. We also explored the influence of temperature on the mechanical properties of kaolinite, which indicated that as temperature increased, the tensile strength and Young's modulus decreased. | Hua Yang ManChao He ChunSheng Lu WeiLi Gong | 2019 | Science China(Physics,Mechanics & Astronomy)2019，62，6： | 3 |
| 8 | Thermography analyses of rock fracture due to excavation and overloading for tunnel in 30° inclined strata显示文摘Large-scale physical model test of 30°inclined strata was conducted to investigate the damage mechanisms during the excavation and overloading using infrared detection.The experiment results were presented with thermal images which were divided into three stages including a full face excavation stage,a staged excavation stage,and an overloading stage.The obtained results were compared with the previously reported results from horizontal,45?,60?,and vertical strata models.Infrared temperature(IRT)for 30°inclined strata model descended with multiple fluctuations during the full-face excavation.For the staged excavation,the excavation damage zone(EDZ)showed enhanced faulting-like strips as compared in the 45?,60?,and vertical models,indicating the intensified stress redistribution occurred in the adjacent rock mass.In contrast,EDZ for the horizontal strata existed in a plastic-formed manner.During the overloading,abnormal features in the thermal images were observed preceding the coalescence of the propagating cracks.The ultimate failure of the model was due primarily to the floor heave and the roof fall. | SUN XiaoMing XU HuiChen HE ManChao GONG WeiLi CHEN Feng | 2017 | Science China(Technological Sciences)2017，60，6： | 2 |
| 9 | Fracture mechanism of inversed trapezoidal shaped tunnel excavated in 45° inclined rock strata显示文摘In order to understand failure mechanisms of the tunnel excavated in the stratified rock masses in deep mine, the physical modeling experiment by using the large-scale model was carried out. The field case simulated in the experiment is a main connection tunnel located at depth of 1000 m in Qishan coal mine,Xuzhou mining district. Tunnel deformation was monitored by using strain gauges and a video camera simultaneously. Crack initiation and propagation process during the test were analyzed based on image analysis of the captured video photographs. At the same time, deformation process of the key monitoring points around the tunnel section is given by the monitored strain plots. Under the increasing external loads, crack initiation occurs firstly on the left wall of the tunnel, then on the immediate roof.Complete failure of the tunnel occurs as a result of the slippage of the rock layers along the interfaces. | He Manchao Peng Yanyan Zhao Shuaiyang Shi Haiyang Wang Ning Gong Weili | 2015 | International Journal of Mining Science and Technology2015，25，4： | 2 |
| 10 | Development of a novel energy-absorbing bolt with extraordinarily large elongation and constant resistance显示文摘 | Manchao He Weili Gong Jiong Wang Peng Qi Zhigang Tao Shui Du Yanyan Peng | 2014 | International Journal of Rock Mechanics and Mining Sciences2014，，： | 2 |
| 11 | Development of a novel energy-absorbing bolt with extraordinarily large elongation and constant resistance显示文摘 | He Manchao Gong Weili Wang Jiong | 2014 | International Journal of Rock Mechanics&Mining Sciences2014，67，： | 1 |
| 12 | Physical modeling of an underground roadway excavation in vertically stratified rock using infrared thermography显示文摘 | Manchao He Xuena Jia Weili Gong Lohrasb Faramarzi | 2010 | International Journal of Rock Mechanics and Mining Sciences2010，，7： | 1 |
| 13 | An overview of the thermography-based experimental studies on roadway excavation in stratified rock masses at CUMTB显示文摘This paper presents an overview of experimental investigations conducted at China University of Mining and Technology Beijing(CUMTB) on roadway excavation using large-scale geomechanical model tests.The simulated sedimentary rocks are composed by alternating layers of sandstone, mudstone and coal seam inclined at varied angles with respect to the horizontal including 0°, 45°, 60°, and 90°. During the excavation, infrared thermography was employed to detect the thermal response of the surrounding rocks under excavation. The obtained raw thermograms were processed using denoising algorithm, data reduction procedure and Fourier analysis. The infrared temperature(IRT) characterizes the overall rock response; the processed thermal images represent the structural behavior, and the Fourier spectrum describes damage development in the frequency domain. Deeper understanding was achieved by the comparative analyses of excavation in differently inclined rock masses using the image features of IRTs, thermal images and Fourier spectra. | Gong Weili Peng Yanyan He Manchao Xie Tian Zhao Shijiao | 2015 | International Journal of Mining Science and Technology2015，25，3： | 1 |
| 14 | A novel process for preparation of ultra - clean mieronized coal by high pressure water jet comminution technique 显示文摘 | Longlian Cui Liqian An Weili Gong | 2007 | Fuel2007，86，56： | 1 |
| 15 | A novel process for preparation of ultra-clean micronized coal by high pressure water jet comminution technique 显示文摘 | Cui Longlian An Liqian Gong Weili | 2007 | Fuel2007，86，56： | 1 |
| 16 | A novel process for preparation of ultraclean micronized coal by high pressure water jet comminution technique 显示文摘 | Cui Longlian An Liqian Gong Weili | 2007 | Fuel2007，86，56： | 1 |
| 17 | microRNA-32在多发性骨髓瘤中的表达及临床意义(英文)显示文摘Objective: This study was aimed to explore the expression of microRNA-32(miR-32) in multiple myeloma(MM), and study its association with β2-microglobulin and staging of MM by Durie-Salmon classification. Methods: The expression level of miR-32 in bone marrow mono-nuclear cells of MM were examined by real-time polymerase chain reaction(real-time PCR), and the correlations between the expression level of miR-32 and related clinic pathologic features β2-microglobulin, staging of MM by Durie-Salmon classification were further analyzed. Results: The expression of miR-32 in MM patients was obviously higher than that in normal control(P < 0.05). The expression of miR-32 in relapsed/ refractory MM patients was obviously higher than that in newly diagnosed MM patients. The expression of miR-32 in MM patients decreased after chemical therapy than that before treatment, especially in effective group(P < 0.05). There was no statistically significant change in ineffective/progress group after chemical therapy(P > 0.05).The expression of miR-32 was associated to staging of MM and β2-microglobulin level. Conclusion: Expression level of miR-32 in MM patients is significantly higher than that in normal bone marrow, these data indicated that miR-32 may play an important role in the development of MM. High-regulated expression of miR-32 was associated with β2-microglobulin and staging of MM by Durie-Salmon classification. | Tenglong Zhang Weili Jia Li Sun Xiaoyan Wang Xiuhua Xing Shuai Gong Chunrui Yu | 2014 | The Chinese-German Journal of Clinical Oncology2014，13，10： | 0 |
| 18 | Comparative Analysis on Pesticide Management System between America and China显示文摘The production and usage amount of pesticides in US rank the leading position in the world. On the basis of protecting the environment and human health, US government has enacted a series of laws and regulations to normalize and manage the production and use of pesticides so as to ensure the development of modern agriculture. In this paper, US pesticide management system is briefly reviewed and compared with the pesticide management system of China, which may provide good reference for china in establishing its own management system and make steps towards the international standard. | Cunzheng ZHANG Yong GONG Weili SHAN Xianjin LIU | 2013 | Asian Agricultural Research2013，5，5： | 0 |
| 19 | Dynamic strain field for granite specimen under SHPB impact tests based on stress wave propagation显示文摘The full-field strain of rock material under dynamic compression load was studied using the high-speed three dimensional digital image correlation(3D-DIC)method.The dynamic test was conducted on Laizhou granite using a split Hopkinson pressure bar(SHPB)method.Wave propagation,dispersion and radial inertial effect on the specimen were found by DIC results.A recovery of strain in the post-peak stage was detected on the specimen by DIC,which was unrevealed in the traditional one-dimensional theory method.It can be found that the strain measured by strain gauge was a calculated average one,whereas the strain measured by 3D-DIC could reflect more variation details.Specifically,the testing principle with impact loads and rock dynamic behavior was re-examined using stress wave propagation theory.The theoretical results showed that the specimen reached equilibrium after a series of wave reflections and transmissions and its stress was infinitely close to the initial value of 109.2 MPa.Moreover,the specimen had the calculated maximum strain of 0.52% and strain rate of 15.11 s^(-1),improving the reasonable agreement with the experimental results and requirements of rock mechanical properties measured by SHPB technology. | Jiong Wang Lei Ma Fei Zhao Bangguo Lv Weili Gong Manchao He Peng Liu | 2022 | Underground Space2022，7，5： | 0 |
| 20 | Cathayanalactone G and other constituents from leaves and twigs of Callicarpa cathayana显示文摘Objective:To study the chemical constituents from the leaves and twigs of Callicarpa cathayana.Methods:The chemical constituents were isolated and purified by column chromatography on silica gel,MCI gel CHP 20 P/P120,Sephadex LH-20,and HPLC.The structures of the compounds were determined by HR-ESI-MS,1 D and 2 D NMR data.Results:A total of 24 compounds were isolated from the 85%methanol extract of leaves and twigs of C.cathayana.They were identified as cathayanalactone G(1),a new diterpene,and 23 known compounds as patagonic acid(2),(-)-16-hydroxycledroda-3,13-dien-16,15-olide-18-oic acid(3),15-methoxypatagonic acid(4),oleanolic acid(5),ursolic acid(6),siaresinolic acid(7),pomolic acid(8),a-amyrin(9),tormentic acid(10),lupeol(11),5,7-dihydroxy-3,4’-dimethoxyflavone(12),5,4’-dihydroxy-3,7,3’-dimethoxyflavone(13),5-hydroxy-3,6,7,4’-tetramethoxyflavone(14),salvigenin(15),kaemferol(16),astragalin(17),pinoresinol 4-O-β-D-glucopyranoside(18),paulownin(19),β-sitosterol(20),β-sitosterolβ-Dglucopyranoside(21),5-hydroxy-coumarin(22),isocopoletin(23),and 4-hydroxycinnamic acid(24).Conclusion:Compound 1 is a new labdane diterpene.Compounds 10,13,16 and 17 are isolated from the genus Callicarpa for the first time.Compounds 7,8,9,12,14,23 and 24 are reported from C.cathayana for the first time. | Shuang Gong Bin Cheng Tiantian Sun Xiaoli Li Xinxin Liang Yuan Wang Xiaochang Dai Weilie Xiao | 2022 | Chinese Herbal Medicines2022，14，2： | 0 |
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