Analysis of uniaxial compression of rock mass with parallel cracks based on experimental study and PFC2D numerical simulation

• Autorzy: Yang Jie , Chen Haijun , Liangxiao Xiong , Xu Zhongyuan , Zhou Tao , Yang Changheng

Identyfikatory

DOI

10.24425/ace.2022.140159

• Języki publikacji: EN

Abstrakty

EN

In this study, the uniaxial compression test and the numerical simulation of the two-dimensional particle flow code (PFC2D) were used to study the mechanical properties and failure laws of rock masses with parallel cracks. The experiment considers the influences of crack length (l), crack angle (β1L β2), and numerical changes in the rock bridge length (ℎ) and bridge angle (α) on failures of rock-like specimens. The results indicate that the uniaxial compressive strength (UCS) of the rock-like specimens with parallel cracks decreases with increasing l under different α values. The smaller angle between the preset crack and the loadinging direction (β) resulting in higher UCS. In addition, a larger ℎ results in higher UCS in the specimen. When β1 or β2 is fixed, the UCS and elastic modulus of the specimen show an ‘M’ shape with an increase in α. Moreover, the crack growth or failure mode of samples with different l values is similar. When β1 or β2 is small, the failure of the specimen is affected by the development and expansion of wing cracks. If one of β1 and β2 is large, the failure of the specimen is dominated by the expansion and development of the secondary cracks which is generated at the tip of the prefabricated crack. Furthermore, when the angle between the prefabricated crack and the loading direction is β1 = 0º, the rock bridge is less likely to reach penetration failure as ℎ increases. Secondary crack connections between the prefabricated cracks occur only when α is small.

Słowa kluczowe

EN

uniaxial compression; parallel crack; numerical simulation; mechanical properties; failure characteristics

PL

ściskanie jednoosiowe; zarysowanie równoległe; symulacja numeryczna; właściwości mechaniczne; charakterystyka awarii

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2022
• Tom: Vol. 68, nr 1
• Strony: 111--128
• Opis fizyczny: Bibliogr. 22 poz., il., tab.

Twórcy

autor

Yang Jie

• College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu, PR China (absolwent)

• https://orcid.org/0000-0001-8430-480X

autor

Chen Haijun

• Geotechnical Engineering Department, Nanjing Hydraulic Research Institute, Nanjing, PR China

• https://orcid.org/0000-0003-0094-9649

autor

Liangxiao Xiong

• School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang , PR China
• Hunan Provincial Key Laboratory of Hydropower Development Key Technology, HydroChina Zhongnan Engineering Corporation, Changsha, PR China

• https://orcid.org/0000-0002-6366-5187

autor

Xu Zhongyuan

• Department of Earth Sciences, University of Delaware, Delaware, United States

• https://orcid.org/0000-0003-4303-1870

autor

Zhou Tao

• College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu, PR China (absolwent)

autor

Yang Changheng

• School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang, PR China (absolwent)

• https://orcid.org/0000-0001-8811-4632

Bibliografia

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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).