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| 1 | 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 |
| 2 | Numerical Simulation of the Two-Phase Fluid Field in a Gas Around Liquid Spray Nozzle 显示文摘 | LIU DINGPING CHEN BOQIANG ZHANG BINGJIE | 2013 | Chemical Engineering Technology2013，36，3： | 1 |
| 3 | Numerical simulation of the two-phase fluid field in a gas-around-liquid spray nozzle显示文摘 | Liu Dingping Chen Boqiang Zhang Bingjie | 2013 | Chemical Engineering&Technology2013，36，3： | 1 |
| 4 | Ahigh-mobilitylow-bandgapcopolymerforefficientsolarcells 显示文摘 | DINGPing CHU Cheng-che LIU Bo etal | 2010 | Macromolecular Chemistry andPhysics2010，211，24： | 1 |
| 5 | Progress in the application of molecular imaging inpsychiatric disorders显示文摘Psychiatric disorders have always attracted a lot of attention from researchers due to the difficulties in their diagnoses and treatments.Molecular imaging,as an emerging technology,has played an important role in the researchers of various diseases.In recent years,molecular imaging techniques including magnetic resonance spectroscopy,nuclear medicine imaging,and fluorescence imaging have been widely used in the study of psychiatric disorders.This review will briefly summarize the progression of molecular imaging in psychiatric disorders. | Jia Tan Guangying Zhang Jiaqi Hao Huawei Cai Dingping Wu Zhuoxiao Su Beibei Liu Min Wu | 2023 | Psychoradiology2023，3，1： | 0 |
| 6 | Field theoretical approach to spin models显示文摘We developed a systematic non-perturbative method base on Dyson–Schwinger theory and theΦ-derivable theory for Ising model at broken phase.Based on these methods,we obtain critical temperature and spin spin correlation beyond mean field theory.The spectrum of Green function obtained from our methods become gapless at critical point,so the susceptibility become divergent at Tc.The critical temperature of Ising model obtained from this method is fairly good in comparison with other non-cluster methods.It is straightforward to extend this method to more complicate spin models for example with continue symmetry. | Feng Liu Zhenhao Fan Zhipeng Sun Xuzong Chen Dingping Li | 2021 | Frontiers of physics2021，16，6： | 0 |
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