动态渗压环境下卸荷岩石循环加卸载变形破坏及能量演化过程分析

doi:10.13722/j.cnki.jrme.2023.1218

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Abstract Taking the excavation and unloading of rock mass under seepage pressure environment as the research object，triaxial cyclic loading failure tests were conducted on unloading rock samples under cyclic pore water pressure to explore the influence of pore pressure level and unloading level on the deformation and energy evolution characteristics of rock samples under dynamic cyclic loading. The results show that：(1) The shape of the stress-strain curve of unloaded rock samples under cyclic loading and unloading is greatly influenced by the pore pressure and the unloading magnitude；(2) During the cyclic loading and unloading process，the difference between the peak circumferential strain and the volumetric strain of unloaded rock samples due to the unloading magnitude shows a trend of first increasing and then decreasing with increasing the initial pore pressure level；(3) The characteristic energy of unloaded rock samples shows a non-linear growth trend with increasing the number of cycles，and the total input energy of unloaded rock samples under the cyclic pore pressure environment is generally than that under the constant pore pressure.

Key words： rock mechanics cyclic pore pressure excavation unloading mechanical properties energy allocation

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	Articles by authors
	CHEN Xingzhou
	BAI Yani
	CHEN Lili
	GONG Sheng
	WANG Wenrui
	LI Zhenhan
	SU Zhenkun

Cite this article:

CHEN Xingzhou,BAI Yani,CHEN Lili, et al. Analysis of cyclic loading and unloading deformation and energy evolution process of unloaded rocks under dynamic osmotic pressure environment[J]. , 2024, 43(10): 2356-2367.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2023.1218 OR https://rockmech.whrsm.ac.cn/EN/Y2024/V43/I10/2356

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