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author:

Wu, Yabin (Wu, Yabin.) [1] | Hu, Jianhua (Hu, Jianhua.) [2] (Scholars:胡建华) | Yang, Dongjie (Yang, Dongjie.) [3] | Wen, Guanping (Wen, Guanping.) [4]

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Scopus SCIE

Abstract:

Layered phyllite excavation works show very strong creep behavior when encountering water, and the creep characteristics are greatly affected by bedding and the stress environment. Therefore, a creep test of saturated phyllite is carried out to study the creep characteristics of saturated phyllite under different bedding and confining pressure conditions, establish a creep constitutive model that can accurately express the coupling relationship between various factors, and reveal the coupling effect of the bedding and confining pressure on the creep of saturated phyllite. The results show that (1) in the case of uniaxial compression creep, the relationship between parameter E 1 and bedding dip angle beta shows a "U"-type relationship, and E 2, E 3, eta 1, and eta 2 all have a "W"-type relationship with the bedding dip angle. (2) During triaxial compression creep, E 1, E 2, E 3, eta 1, and eta 2 exhibit a bedding dip angle beta in a "U" shape; as the bedding angle gradually increases from 0 degrees to 90 degrees, the creep parameters all show a law of first decreasing (reaching the minimum when the bedding angle is 45 degrees) and then increasing. (3) When the confining pressure is 15 MPa and the bedding angle is 0 degrees and 90 degrees, the triaxial creep fitting parameters are geometrically multiplied compared with the uniaxial creep parameters with the same inclination, which indicates that the confining pressure has an inhibitory effect on the creep of the bedding angle of 0 degrees and 90 degrees, while the bedding angle of 30 degrees similar to 60 degrees has a small increase in the creep fitting parameters, and its deformation and damage are mainly controlled by the bedding. (4) The uniaxial and triaxial creep simulation results of the FLAC3D constitutive model are in good agreement with the test results, which verifies that the secondary development of the creep constitutive model is successful and reliable.

Keyword:

Community:

  • [ 1 ] [Wu, Yabin]Hunan Univ Sci & Technol, Sch Resources Environm & Safety Engn, Xiangtan 410012, Peoples R China
  • [ 2 ] [Hu, Jianhua]Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Peoples R China
  • [ 3 ] [Wen, Guanping]Cent South Univ, Sch Resources & Safety Engn, Changsha 410083, Peoples R China
  • [ 4 ] [Yang, Dongjie]Henan Polytech Univ, Sch Safety Sci & Engn, Jiaozuo 454003, Peoples R China

Reprint 's Address:

  • [Yang, Dongjie]Henan Polytech Univ, Sch Safety Sci & Engn, Jiaozuo 454003, Peoples R China

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Source :

ACS OMEGA

ISSN: 2470-1343

Year: 2025

Issue: 24

Volume: 10

Page: 25362-25375

3 . 7 0 0

JCR@2023

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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