礁灰岩孔隙结构表征及关键孔隙节点识别研究

doi:10.13722/j.cnki.jrme.2022.0571

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Abstract As a natural porous medium，coral reef limestone owns a complex pore structure，which lays great influences on its macroscopic mechanical and seepage properties. In order to accurately characterize the pore structure of coral reef limestone and explore the structural features of its pore network，this paper constructed digital 3D models and equivalent pore network models by combining CT scanning and 3D reconstruction techniques for coral reef limestone samples collected from Hainan. The spatial features of pore structure distribution of the two coral reef limestones were analyzed，and statistical analyzes were performed on pore structural parameters including porosity，pore throat size and coordination number. A topological network model of the internal pore structure was constructed to carry out complex network analyses，whereby the overall and individual property indicators of the core reef limestone pore network were obtained. The key nodes affecting the network characteristics were identified. The study shows that the coral reef limestone has high porosity and non-homogeneity，and the distributions of both pore throat size and coordination number conform to the log-normal distribution rule. The internal pore network is well connected with a high degree of compactness，and there exist some key pore nodes with high importance，which have a greater influence on the overall network characteristics.

Key words： rock mechanics coral reef limestone CT scanning pore structure complex network analysis key pore nodes

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	Articles by authors
	XU Jun1
	2
	HUANG Xin1
	2
	WANG Junpeng1
	2
	ZHANG Zixin1
	2
	LI Yun3

Cite this article:

XU Jun1,2,HUANG Xin1, et al. Characterization of coral reef limestone?s pore structure and identification of key pore nodes[J]. , 2023, 42(S1): 3355-3366.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2022.0571 OR https://rockmech.whrsm.ac.cn/EN/Y2023/V42/IS1/3355

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