Microscopic Mechanics of Debris Accumulation Body with Expansive Fine Grain and PFC Numerical Simulation

Li Ning Zheng; Qiang Xie; Wen Zhao; Meng Fei Qu; Chun Hua Li

doi:10.4028/www.scientific.net/AMR.243-249.4188

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 243-249Microscopic Mechanics of Debris Accumulation Body...

Microscopic Mechanics of Debris Accumulation Body with Expansive Fine Grain and PFC Numerical Simulation

Abstract:

To study the influence mechanism of the excavation stability of the debris accumulation body by the expansive fine grain, it has used by Particle Flow Code, based on indoor test, the fine-grain expansive effect has divided into fine-grain intensity attenuation and volume expansion, and it has linear decreased down from the surface on the accumulation body. Based on the contrastive analysis between simulated result and traditional finite element, the Particle Flow Code is more accurate and true. The analysis result has suggested that when consider the expansive action, the damage model is changed into surface sliding from part slump, and the X-direction stress added 20kPa in the interior of the accumulation body, and the whole sliding force added 30% more or less. At present, the field excavation situation is consistent with the calculation result.

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Periodical:

Advanced Materials Research (Volumes 243-249)

Pages:

4188-4194

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.243-249.4188

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Online since:

May 2011

Authors:

Li Ning Zheng, Qiang Xie, Wen Zhao, Meng Fei Qu, Chun Hua Li

Keywords:

Debris Accumulation Body, Microscopic Mechanics, Numerical Simulation, Particle Flow Code

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