Multi-pore approximation model for simulation of macroscopic mechanical properties and failure behavior of coal under uniaxial compression

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-03-12 DOI:10.1016/j.powtec.2025.120888

Mingjun Jiang , Yingke Liu , Zhaoxi Long , Xiangyang Bu , Fengchao Wang , Yue Niu

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引用次数: 0

Abstract

Under the influence of coal formation, evolution, and mining disturbances, the pores and cracks are the main characteristics of coal. Understanding how these characteristics affect the macroscopic properties and failure evolution of coal is crucial for ensuring safe coal mining. This study presents a multi-pore approximation model to investigate the impact of pore parameters, such as porosity and pore distribution, on the macroscopic properties, stress distribution, and failure characteristics of porous coal. Results show that higher porosity weakens the coal strength and accelerates its failure, while pore distribution significantly influences stress distribution and failure patterns. Internal element failure mirrors pore distribution, with vertical variations in pore distribution being the primary factor influencing the total number of failure elements. Furthermore, porosity and pore distribution co-influence coal failure, with a quadratic relationship observed between porosity and the total number of failure elements.

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.