Numerical investigation of blasting-induced crack initiation and propagation in rocks

Zhu, Zhixue; Mohanty, B.; Xie, Heping

doi:10.1016/j.ijrmms.2006.09.002

Cited by 254 publications

(127 citation statements)

References 12 publications

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“…AUTODYN code has been successfully applied in the study of rock fracturing by Ma et al [12] and Zhu et al [25]. In this study, the Lagrange processor is applied, and only for the case of air-coupling, Euler processor is applied, which is ideally suited to simulating the problems of fluid and gas flow.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of blasting-induced damage in cylindrical rocks

Zhu

Xie

Mohanty

2008

International Journal of Rock Mechanics and Mining Sciences

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169

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Section: Introductionmentioning

confidence: 99%

Numerical investigation of blasting-induced damage in cylindrical rocks

Zhu

Xie

Mohanty

2008

International Journal of Rock Mechanics and Mining Sciences

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169

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“…(6) In the further study, the dynamic unloading process should be considered because the dynamic loading [29][30][31] is different from the static loading.…”

Section: Deformation During the Unloading Processmentioning

confidence: 99%

An Experimental Study on Deformation Fractures of Fissured Rock around Tunnels in True Triaxial Unloads

Wang

Zhu

Xie

2015

Advances in Materials Science and Engineering

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Joints and cracks are frequently encountered in underground rock mass. During the process of tunnel excavations or other underground construction, the rock will be exposed suddenly, and such sudden unloading process will cause crack expansion and destabilize the rock structure. In order to investigate the crack behaviour during this process, a true triaxial loading apparatus with a computer-controlled electrohydraulic servosystem was established, and a series of true triaxial loading and unloading experiments was conducted by using concrete specimens containing inclined cracks with inclinations of 15 ∘ , 30 ∘ , 45 ∘ , 60 ∘ , and 75 ∘ . The stressstrain behavior and the failure property of rock models during unloading process were obtained, and, additionally, the coefficient of brittle stress drop was investigated. The uniaxial compression tests were simulated by using finite element method.

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“…In the literature, considerable effort at investigating blast induced rock mass crack initiation and propagation has been made. For example, Zhu et al [25] numerically studied the role of stress wave loading on crack initiation and propagation during the initial stage of detonation in a borehole by using the AUTODYN 2D code. Based on a coupled numerical method using both LS-DYNA and UDEC, Wang and Konietzky [26] modelled the dynamic fracturing process of jointed rock masses due to blast wave loading.…”

Section: Introductionmentioning

confidence: 99%

Blast Induced Crack Propagation and Damage Accumulation in Rock Mass Containing Initial Damage

Wang

Zhao

et al. 2018

Shock and Vibration

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Blast induced rock mass damage and crack propagation play important roles in structure safety and stability in mining, quarrying, and civil constructions. This paper focuses on the effect of small blasthole diameter blast on crack propagation and damage accumulation in water-bearing rock mass containing initial damage composed of inherent geological discontinuities and previous multiblast induced damage. To elucidate this effect, theoretical analysis of calculation method for several important blast influencing factors is firstly presented. Secondly, definition of a practical damage variable using ratio of longitudinal wave velocity in rock mass before blast occurrence to that after blast occurrence and derivation of a damage accumulation calculation equation accounting for initial damage and blasting effect are described. Lastly, a detailed description of the conducted in situ blast tests and plan layout of the sonic wave monitoring holes is reported. The results indicate that blast activates and then extends the initial cracks in rock mass, leading to accumulation of rock mass damage. The rock mass damage accumulation can be conveniently quantified using the proposed damage variable. When the damage variable reaches its threshold of 0.19, occurrence of damage in the surrounding rock mass is indicated. It is also found that the blast induced rock mass damage extent and the blast induced vibration velocities decrease nonlinearly with increasing the distance between blast source and monitoring position.

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Numerical investigation of blasting-induced crack initiation and propagation in rocks

Cited by 254 publications

References 12 publications

Numerical investigation of blasting-induced damage in cylindrical rocks

Numerical investigation of blasting-induced damage in cylindrical rocks

An Experimental Study on Deformation Fractures of Fissured Rock around Tunnels in True Triaxial Unloads

Blast Induced Crack Propagation and Damage Accumulation in Rock Mass Containing Initial Damage

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