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| 1 | Mechanism and technology study of collaborative support with long and short bolts in large-deformation roadways显示文摘Common short bolts of equal length are widely used to support the roofs of roadways in coal mines.However, they are insufficient to keep the roof stable against large deformations, so docking long bolts with high levels of elongation that can adapt to large deformations of the surrounding rock have been adopted. This paper proposes a collaborative support method that uses long and short bolts. In this study,the mechanism of docking long bolts and collaborative support was studied. Numerical simulation, similarity simulation, and field testing were used to analyze the distribution law of the displacement, stress,and plastic failure in the surrounding rock under different support schemes. Compared with the equal-length short bolt support, the collaborative support changed the maximum principal stress of the shallow roof from tensile stress to compressive stress, and the minimum principal stress of the roof significantly increased. The stress concentration degree of the anchorage zone clearly increased. The deformation of the roof and the two sides was greatly reduced, and the subsidence shape of the shallow roof changed from serrated to a smooth curve. The roof integrity was enhanced, and the roof moved down as a whole. Plastic failure significantly decreased, and the plastic zone of the roof was within the anchorage range. The similarity simulation results showed that, under the maximum mining stress,the roof collapsed with the equal-length short bolt support but remained stable with the collaborative support. The collaborative support method was successfully applied in the field and clearly improved the stability of the surrounding rock for a large deformation roadway. | Yu Hui Niu Zhiyong Kong Linggen Hao Caicheng Cao Peng | 2015 | International Journal of Mining Science and Technology2015，25，4： | 5 |
| 2 | The effect of homocysteine-lowering therapy with folic acid on flow-mediated vasodilation in patients with coronary artery disease: A meta-analysis of randomized controlled trials显示文摘 | Yaxin Liu Tao Tian Huijun Zhang Linggen Gao Xianliang Zhou | 2014 | Atherosclerosis2014，，1： | 2 |
| 3 | Aqueous chemical synthesis of Ln2Sn2O7 pyrochlore- structured ceramics 显示文摘 | KONG Linggen KARATCHEVTSEVA I BLACKFORD M G | 2013 | Journal of the American Ceramic Society2013，96，9： | 1 |
| 4 | Silica particles:a novel drug-delivery system显示文摘 | Barbe C Bartlett J Linggen K | 2004 | Adv Mater2004，16，21： | 1 |
| 5 | Silica particles:a novel drug-delivery system显示文摘 | Christophe B John B Linggen K | 2004 | Advanced Materials2004，16，21： | 1 |
| 6 | Gd2Zr2O7 and Nd2Zr2O7 pyrochlore prepared by aqueous chemical synthesis显示文摘 | KONG LINGGEN KARATCHEVTSEVA INNA GREGG D | 2013 | J Eur Ceram Soc2013，33，： | 1 |
| 7 | Factors Influencing Prognosis in Patients With Marfan Syndrome After Aortic Surgery显示文摘 | Linggen Gao Xianliang Zhou Lin Zhang Dan Wen Qian Chang Yongbo Wu Lizhong Sun Rutai Hui | 2011 | Journal of Cardiothoracic and Vascular Anesthesia2011，，4： | 1 |
| 8 | Synthesis of hierarchical mesoporous Ln_(2)Ti_(2)O_(7)(Ln=Y,Tb-Yb)pyrochlores and uranyl sorption properties显示文摘Mesoporous structured metal oxides exhibit many active applications.However,the synthesis of crystalline metal oxides with a ternary composition while maintaining satisfactory pore features is challeng-ing.Typically,high temperatures are required which inhibit control of pore structure properties including surface area,pore volume,and pore size.Herein,the synthesis of ternary metal oxides Ln_(2)Ti_(2)O_(7)pos-sessing pyrochlore crystal structure is achieved using a novel technique which combines‘soft’and hard colloid templating strategies.The formed materials are of submicron size and composed of∼25-30 nm product‘building blocks’with good chemical and phase stability.The polycrystalline powders have a high specific surface area(up to 70 m^(2)·g^(-1))and pore volume(∼0.35 cm^(3)·g^(-1))which result in a good adsorp-tion capacity(U uptake closing to 60 mg·g^(-1)).Remarkably,the material exhibits a significant portion of mesopores(mainly 10-40 nm)which facilitate fast adsorption of the cations due to high accessibility.The synthetic methodology described herein produces highly homogenous powders and can be applied to other compositions and structures. | Linggen Kong Inna Karatchevtseva Tao Wei Nicholas Scales | 2022 | Journal of Materials Science & Technology2022，，18： | 0 |
| 9 | Synthesis and microstructure characterization of tetragonal Zr1–xTixO2 (x = 0–1) solid solutions显示文摘Oxide powders of Zr1_xTixO2(x=0-1)solid solutions with micron-sized particles were synthesized via a solution combustion method.The synthesis process and Zr/Ti molar ratio were optimized to produce powders with the tetragonal crystal structure.X-ray diffraction,Raman spectroscopy and transmission electron spectroscopy results confirm that a full crystallization microstructure with the single tetragonal phase is obtained after calcination at 600℃while maintaining the crystallite size<30 nm.Zr/Ti oxide mixtures with Zr>67 mol%exhibit a tetragonal crystal structure and the embedding Ti in ZrO2 improves the structure stability.The nitrogen sorption results indicate that the powders possess mesoporous morphology with medium specific surface areas(~10-50 m^2/g).Chemical stability tests show that these powders are relatively stable with negligible removal of titanium and zirconium after elution by 0.5 mol/L HC1.Density functional theory was used to calculate the most stable structure with low energy for the selected composition. | Linggen Kong Inna Karatchevtseva Hanliang Zhu Meng Jun Qin Zaynab Aly | 2019 | Journal of Materials Science & Technology2019，35，9： | 0 |
| 10 | OPTICAL ISOTOPE SHIFT MEASUREMENTS USING COLLINEAR ION BEAM LASER SPECTROSCOPY AND THE CONFIGURATION OF THE NdII(23537)_(9/2)^(0) LEVEL显示文摘The optical isotope shifts,of five even isotopes of neodymium have been measured by using collinear ion beam laser spectroscopy(CZBLS).Isotopically pure NdII ions with energy of 30ke V from an isotope separator were collinearly interacted with light from a tunable dye laser and selectively excited from a metastable level of 4f^(4) 5d^(6) K_(9/2) to the(23537)_(9/2)^(0) level by Doppler tuning technique.The resonant excitation frequency values for each Nd isotope with mass number of 142,144,146,148 and 150 were obtained.After the separation of the normal and specific mass shift and the field shift from the experimentally measured isotope shift,the configuration of the(23537)_(9/2)^(0),level was decomposed into 4f^(4)6p,4f^(3)5d^(2) and 4f^(3)5d6p,and their fractions,for the first time.were determined to be 0.12-0.13,0.88-0.85 and 0-0.02,respectively. | LU Fuquan WU Songmao WANG Yau sen SHI Wei SHI Peixiong SONG Linggen YANG Jianjun TANG Jiayong YANG Fujia | 1990 | Chinese Physics Letters1990，7，1： | 0 |
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