| 用颗粒流模拟技术模拟固化时间对胶结膏体细观参数的影响 |
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| 作者单位： | Energy School,Xi'an University of Science and Technology,Xi'an 710054,China;Key Laboratory of Western Mines and Hazards Prevention,Ministry of Education of China,Xi'an 710054,China;Energy School,Xi'an University of Science and Technology,Xi'an 710054,China;School of Highway,Chang'an University,Xi'an 710064,China;Beijing General Research Institute of Mining&Metallurgy,Beijing 100160,China;Department of Civil Engineering,Inha University,Incheon 402-751,South Korea |
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| 基金项目： | and the Outstanding Youth Science Fund of Xi'an Uni-versity of Science and Technology;the Scientific Research Program funded by the Shaanxi Education Department;the Natural Science Basic Research Plan of Shaanxi Province the China Postdoctoral Science Foundation;This work was financially supported by the National Nat-ural Science Foundation of China;This research was also supported by the National Research Coun-cil of Science&and Technology(NST)grant by the Korea Korean government(MSIP)(No.CRC-16-38502-KICT);of China |
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| 摘 要： | Several special mechanical properties, such as dilatancy and compressibility, of cemented paste backfill (CPB) are controlled by its internal microstructure and evolution. The mesoscopic structure changes of CPB during the development process were investigated. On the basis of the scanning electron microscopy (SEM) and mechanical test results of CPB, the particle size information of CPB was extracted, and a two-dimensional particle flow code (PFC) model of CPB was established to analyze the evolution rule of mesoscopic parameters during CPB development. The embedded FISH language in PFC was used to develop a program for establishing a PFC model on the basis of the SEM results. The mesoscopic parameters of CPB samples at different curing times, such as coordination number (Cn), contact force chain, and rose diagram, were obtained by recording and loading and used to analyze the intrinsic relationship between mesoscopic parameter variations and macroscopic mechanical response during CPB development. It is of considerable significance to establish the physical model of CPB using the PFC to reveal the mesoscopic structure of CPB.
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| 关 键 词： | ,,,,, |
Effect of curing time on the mesoscopic parameters of cemented paste backfill simulated using the particle flow code technique |
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| Authors: | Lang Liu Jie Xin Chao Huan Yu-jiao Zhao Xiang Fan Li-jie Guo KI-IL Song |
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| Abstract: | Several special mechanical properties, such as dilatancy and compressibility, of cemented paste backfill (CPB) are controlled by its internal microstructure and evolution. The mesoscopic structure changes of CPB during the development process were investigated. On the basis of the scanning electron microscopy (SEM) and mechanical test results of CPB, the particle size information of CPB was extracted, and a two-dimensional particle flow code (PFC) model of CPB was established to analyze the evolution rule of mesoscopic parameters during CPB development. The embedded FISH language in PFC was used to develop a program for establishing a PFC model on the basis of the SEM res-ults. The mesoscopic parameters of CPB samples at different curing times, such as coordination number (Cn), contact force chain, and rose dia-gram, were obtained by recording and loading and used to analyze the intrinsic relationship between mesoscopic parameter variations and mac-roscopic mechanical response during CPB development. It is of considerable significance to establish the physical model of CPB using the PFC to reveal the mesoscopic structure of CPB. |
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| Keywords: | cemented paste backfill particle flow code method mesoscopic parameters fabric |
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