Study on the microstructural evolution of gangue cemented backfill under uniaxial compression

IF 2.8 3区工程技术 Q1 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS Computational Particle Mechanics Pub Date : 2024-10-05 DOI:10.1007/s40571-024-00821-z

Dongmei Huang, Xin Pan, Xikun Chang, Shuyu Qiao, Daqian Xing, Xinzhao Wang

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引用次数: 0

Abstract

In cemented paste backfill (CPB), the connection mode and spatial position arrangement of particles determine the deformation, structural strength and stability of the backfill. Based on the scanning electron microscope images of CPB, the representative elementary area (REA) of the pore structure of CPB is obtained. The actual microstructure of CPB in PFC^2D according to REA was modeled, and the microscopic parameters of the model based on the results of indoor uniaxial compression tests were calibrated. Finally, by studying the microstructure, mechanical properties, force chain, normal contact force, tangential contact force and coordination number of CPB with different curing time (3 days, 7 days, 28 days), the internal relationship between mesoscopic parameters and macroscopic mechanical properties during CPB development was analyzed. Exploring the changes of mesostructure during the development of CPB is of great significance to the study of heterogeneous structure and multi-scale mechanical theory system.

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来源期刊

Computational Particle Mechanics Mathematics-Computational Mathematics

CiteScore

5.70

自引率

9.10%

发文量

期刊介绍： GENERAL OBJECTIVES: Computational Particle Mechanics (CPM) is a quarterly journal with the goal of publishing full-length original articles addressing the modeling and simulation of systems involving particles and particle methods. The goal is to enhance communication among researchers in the applied sciences who use "particles'''' in one form or another in their research. SPECIFIC OBJECTIVES: Particle-based materials and numerical methods have become wide-spread in the natural and applied sciences, engineering, biology. The term "particle methods/mechanics'''' has now come to imply several different things to researchers in the 21st century, including: (a) Particles as a physical unit in granular media, particulate ﬂows, plasmas, swarms, etc., (b) Particles representing material phases in continua at the meso-, micro-and nano-scale and (c) Particles as a discretization unit in continua and discontinua in numerical methods such as Discrete Element Methods (DEM), Particle Finite Element Methods (PFEM), Molecular Dynamics (MD), and Smoothed Particle Hydrodynamics (SPH), to name a few.