Dynamic tensile behaviour under impact loading for rocks damaged by static precompression

Zheng, Qiangqiang; Xu, Ying; Yin, Zhiqiang; Wang, Feng; Zhang, Haijiang

doi:10.1007/s43452-023-00748-x

Artykuł - szczegóły

Tytuł artykułu

Dynamic tensile behaviour under impact loading for rocks damaged by static precompression

Autorzy

Zheng Qiangqiang , Xu Ying , Yin Zhiqiang , Wang Feng , Zhang Haijiang

Wybrane pełne teksty z tego czasopisma

http://www.springer.com/journal/43452

Identyfikatory

DOI

10.1007/s43452-023-00748-x

Warianty tytułu

Języki publikacji

Abstrakty

In geotechnical engineering projects, rock masses are subjected to various degrees of disturbance from geotectonic movements, rock drilling and mining before they are subjected to dynamic loads such as rock bursts, earthquakes, and blasting. We aim to investigate the dynamic mechanical properties, strain field, energy evolution, and progressive cracking of damaged sandstone under impact loading. In this study, sandstone specimens undergo various damage degrees caused by precompression and are characterized by computed tomography (CT) imaging. Then, the damaged specimens are subjected to impact tensile loads by employing a split Hopkinson pressure bar (SHPB) coupled with a high-speed camera and digital image correlation (DIC). The experimental results show that the energy dissipation density ratio, scale of the initial central crack, strain, and level of rock fragmentation in the vicinity of the bar-sample interfaces all increase with increasing driving pressure or sandstone damage degree. In contrast, the regular pattern of dynamic tensile strength is the opposite. We also find that the total strength rises before the prestress ratio of 0.2 and subsequently decreases as the sandstone’s damage degree increases. The rock’s dynamic tensile strength reduction ratio grows with the Weibull distribution as the damage degree expands. In addition, the function of the growth rate of the dissipated energy density ratio concerning the sandstone’s damage factor follows the Weibull distribution. These findings are of great significance to studying the mechanical responses of damaged rock and risk mitigation under dynamic catastrophes such as rock bursts, earthquakes, and blasting in rock engineering projects.

Słowa kluczowe

dynamic tensile load SHPB mining roadway energy evolution cracking process

proces pękania inżynieria geotechniczna trzęsienie ziemi

Wydawca

Springer
Wrocław University of Science and Technology

Czasopismo

Archives of Civil and Mechanical Engineering

Rocznik

2023

Tom

Vol. 23, no. 3

Strony

art. no. e199, 2023

Opis fizyczny

Bibliogr. 34 poz., rys., tab., wykr.

Twórcy

autor

Zheng Qiangqiang

zhengqq@ustc.edu.cn

Laboratory of Seismology and Physics of Earth’s Interior, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, Anhui, China
Mengcheng National Geophysical Observatory, University of Science and Technology of China, Mengcheng 233500, Anhui, China
State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan 232001, Anhui, China

https://orcid.org/0000-0001-8821-7834

autor

Xu Ying

State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan 232001, Anhui, China

https://orcid.org/0000-0001-8438-3130

autor

Yin Zhiqiang

State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan 232001, Anhui, China

https://orcid.org/0000-0002-0892-4166

autor

Wang Feng

Beijing CAS-Mechanics Blasting Co., Ltd, Beijing 101318, China

https://orcid.org/0000-0002-4367-9071

autor

Zhang Haijiang

Laboratory of Seismology and Physics of Earth’s Interior, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, Anhui, China
Mengcheng National Geophysical Observatory, University of Science and Technology of China, Mengcheng 233500, Anhui, China

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024)

Typ dokumentu

Bibliografia

Identyfikator YADDA

bwmeta1.element.baztech-0e0335b6-e2de-4933-a087-d2abd3858e83