不同粗糙度和渗透溶液下石灰岩粗糙裂隙渗流特性试验研究

doi:10.13722/j.cnki.jrme.2022.0749

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Abstract In order to explore the influences of joint roughness coefficient JRC，seepage solution and confining pressure loading on the seepage characteristics of limestone rough fractures，the distilled water and sodium sulfate solution were selected as seepage solutions to carry out limestone fissure seepage tests under different conditions. The evolution mechanism of seepage characteristics of limestone rough fracture under different roughness and seepage solutions was revealed by combining the morphological characteristics of the fracture surface before and after the tests. The results show that the fracture seepage flow rate，equivalent hydraulic gap width and permeability show a trend of rapid decline，slow decline and basically stable change with the increase of seepage time. Under the same seepage solution and stress condition，the larger the JRC of fracture surface is，the smaller the permeability is. With the increase of confining pressure，the fracture seepage flow and permeability decrease continuously. Compared with distilled water，the fracture surface of the sample corroded by sodium sulfate solution becomes coarser，JRC of each fracture surface increases by 3.31%–36.61%，and surface roughness parameter increases by 0.10%–1.05%. The research results can provide theoretical support for the estimation of fracture permeability and leakage of fractured rock mass.

Key words： rock mechanics limestone fracture seepage joint roughness coefficient seepage fluids morphological characteristics seepage characteristics

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	Articles by authors
	GAN Lei
	LIU Yu
	SHEN Zhenzhong
	XU Liqun
	MA Hongying

Cite this article:

GAN Lei,LIU Yu,SHEN Zhenzhong, et al. Experimental study on seepage characteristics of limestone rough fracture under different roughness and seepage solutions[J]. , 2023, 42(S2): 3996-4005.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2022.0749 OR https://rockmech.whrsm.ac.cn/EN/Y2023/V42/IS2/3996

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