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Bulletin of Engineering Geology and the Environment

Erschienen in:

01.07.2022 | Original Paper

Mechanical behaviour and failure characteristics of rocks with composite defects of different angle fissures around hole

verfasst von: Dehao Yao, Ning Jiang, Xujun Wang, Xiaodong Jia, Ke Lv

Erschienen in: Bulletin of Engineering Geology and the Environment | Ausgabe 7/2022

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Abstract

To study the mechanical properties of rocks with cracks of different angles around the hole, the particle flow discrete element software PFC2D and laboratory experiments were used to conduct uniaxial compression tests on rocks with cracks of different angles around the hole. The failure behaviour and mechanical properties of rock samples with cracks of different angles were analysed, the failure modes of rocks with defects of different angles were revealed, and the crack propagation and stress evolution of rocks with cracks of different angles were studied. The results show that compared with the intact rocks, the peak stress, elastic modulus, peak strain, initiation stress, damage stress, and other properties of fissure rocks with different angles around the hole are lower; the defect combination of different fissure angles around the hole has a substantial impact on the failure characteristics of rock samples—different fissure angles in rock samples produce different failure modes, resulting in different crack development and propagation processes. Through the comparative study of indoor experiments, the results of indoor real rock and numerical simulation experiments are verified, and the macroscopic failure characteristics of rocks are similar. This study can correctly understand the mechanical properties of fissure rocks with different angles around the hole and provide theoretical guidance for practical rock engineering.

Vorheriger Artikel Asymmetric deformation characteristics and mechanical behavior for tunnels in soft-hard inclined contact strata under high geo-stress: a case study

Nächster Artikel Estimation of rock joint diameter distribution using numerically generated joint center volume

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Titel: Mechanical behaviour and failure characteristics of rocks with composite defects of different angle fissures around hole
verfasst von: Dehao Yao
Ning Jiang
Xujun Wang
Xiaodong Jia
Ke Lv
Publikationsdatum: 01.07.2022
Verlag: Springer Berlin Heidelberg
Erschienen in: Bulletin of Engineering Geology and the Environment / Ausgabe 7/2022
Print ISSN: 1435-9529
Elektronische ISSN: 1435-9537
DOI: https://doi.org/10.1007/s10064-022-02783-z

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