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《Chinese Journal of Underground Space and Engineering》 2017-03
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Geometry Model in Particle Flow Simulation of Granite Based on Actual Distribution

Xu Jinming;Zhao Dan;Huang Dayong;Department of Civil Engineering,Shanghai University;  
Rock is generally composed of various meso-compositions.The differences in type and the interactions between these meso-cmpositions may affect the macro-mechanics properties of rock material.In the current study,taking granite as an example,the actual locations and types of the compositions were determined using grayscale threshold segmentation technique.The cements were then characterized by parallel contacts between particles.The cluster and clump were used to present the biotitite,and feldspar and quartz,respectively.A geometrical model based on the actual types and distributions of the compositions was thereafter established in particle flow simulation in mseo scale.It shows that the types and locations of various compositions in granite obtained from the digital processing may be efficiently used as the input data in establishing the geometrical model in a particle flow simulation;different compositions may be constructed respectively by using the clusters or clumps;the physical and mechanics parameters in the meso scale may much affect the mechanical features of granite.Because the features and variations of the mesocompositions control the deformation/failure process,the method proposed herein may provide a new routine to investigate the mechanical properties of the rock materials.
【Key Words】: granite actual distribution particle flow simulation geometry model
【Fund】: 国家自然科学基金(41472254)
【CateGory Index】: TU45
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