Excavation‑induced structural deterioration of rock masses at different depths

• Autorzy: Zhang R. , Xie H. P. , Ren Li , Deng H. I. , Gao M. Z. , Feng G. , Zhang Z. T. , LI X. P. , Tan Q.

Identyfikatory

DOI

10.1007/s43452-022-00401-z

• Języki publikacji: EN

Abstrakty

EN

The excavation-induced deterioration of rock mass quality and integrity may significantly affect the stability of deep underground spaces. However, the influence of the burial depth on excavation-induced rock mass structural deterioration remains unclear. To address this issue, in the Jinping II auxiliary tunnels, borehole acoustic wave and digital panoramic borehole imaging tests were conducted at five depths, and the surrounding rock mass structure deterioration was comprehensively quantified at these depths. The results show that the wave curve significantly varies with increasing depth, and the deeper the tunnel section is, the more severe the rock damage is, the larger the excavation damage zone is, and the more complex the generated fracture network is. An excavation-damaged zone and excavation-disturbed zone (EdZ) were found in the rock masses at shallow depths, while a highly damaged zone (HDZ) and EdZ were observed at greater depths. Further investigation demonstrates that the formation pattern of excavation-damaged zones (EDZs) at deep depths follows a stress-concentration controlled mode, and at very shallow depths, horizontal unloading plays a dominant role in the EDZ formation process (yielding a pure unloading-controlled mode), while at intermediate depths, a mixed EDZ formation mode is observed.

Słowa kluczowe

EN

rock masses; deterioration of rock mass; excavations; fracture network

PL

masy skalne; degradacja górotworu; prace wykopaliskowe; sieć pęknięć

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2022
• Tom: Vol. 22, no. 2
• Strony: art. no. e81, 1--15
• Opis fizyczny: Bibliogr. 42 poz., il., tab., wykr.

Twórcy

autor

Zhang R.

• College of Hydraulic and Hydropower Engineering, Sichuan University, Chengdu, China

autor

Xie H. P.

• College of Hydraulic and Hydropower Engineering, Sichuan University, Chengdu, China

autor

Ren Li

• School of Architecture and Environment, Sichuan University, Chengdu, China

• https://orcid.org/0000-0002-4003-8826

autor

Deng H. I.

• College of Hydraulic and Hydropower Engineering, Sichuan University, Chengdu, China

autor

Gao M. Z.

• College of Hydraulic and Hydropower Engineering, Sichuan University, Chengdu, China

autor

Feng G.

• College of Hydraulic and Hydropower Engineering, Sichuan University, Chengdu, China

autor

Zhang Z. T.

• College of Hydraulic and Hydropower Engineering, Sichuan University, Chengdu, China

autor

LI X. P.

• College of Hydraulic and Hydropower Engineering, Sichuan University, Chengdu, China

autor

Tan Q.

• School of Architecture and Environment, Sichuan University, Chengdu, China

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023)