FDEM simulation of rock damage evolution induced by contour blasting in the bench of tunnel at deep depth

Han, Haoyu; Fukuda, Daisuke; Liu, Hongyuan; Salmi, Ebrahim Fathi; Sellers, Ewan; Tingjin, Liu; Chan, Andrew

doi:10.1016/j.tust.2020.103495

Cited by 49 publications

(11 citation statements)

References 41 publications

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“…Qiu et al [14] established the numerical model of a deep-buried U-shaped tunnel in a particle flow code (PFC2D) and investigated the influence of buried depth on the tunnel dynamic stability. Hana et al [15,16] combined finite and discrete element methods (FDEM) to study the damage evolution of a deep tunnel by combining finite element and discrete element methods.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Fracture Characteristics of Deep Granite Induced by Blast Stress Wave

Zhu

Gao

Wan

et al. 2021

Shock and Vibration

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To study the characteristics of rock fracture in deep underground under blast loads, some numerical models were established in AUTODYN code. Weibull distribution was used to characterize the inhomogeneity of rock, and a linear equation of state was applied to describe the relation of pressure and volume of granite elements. A new stress initialization method based on explicit dynamic calculation was developed to get an accurate stress distribution near the borehole. Two types of in situ stress conditions were considered. The effect of heterogeneous characteristics of material on blast-induced granite fracture was investigated. The difference between 2D models and 3D models was discussed. Based on the numerical results, it can be concluded that the increase of the magnitude of initial pressure can change the mechanism of shear failure near the borehole and suppress radial cracks propagation. When initial lateral pressure is invariable, with initial vertical pressure rising, radial cracks along the acting direction of vertical pressure will be promoted, and radial cracks in other directions will be prevented. Heterogeneous characteristics of material have an obvious influence on the shear failure zones around the borehole.

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Section: Introductionmentioning

confidence: 99%

Numerical Study of Fracture Characteristics of Deep Granite Induced by Blast Stress Wave

Zhu

Gao

Wan

et al. 2021

Shock and Vibration

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“…Researchers continue to study blasting safety during construction 1 – 4 . With rapid developments in the scale and buried depth of underground excavation 5 , the construction of a large number of underground caverns has been commenced successively, and the associated difficulties in blasting excavation construction and vibration prediction control of upright high sidewalls have been increasing 6 – 9 . During blasting excavation, energy propagates along the sidewall in the form of vibration waves, inducing damage to the surrounding rock and lining and leading to sidewall instability, closed function failure, and other problems.…”

Section: Introductionmentioning

confidence: 99%

PPV distribution of sidewalls induced by underground cavern blasting excavation

Luo

Wei

Huang

et al. 2021

Sci Rep

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The peak particle velocity (PPV) is an important indicator for predicting blasting excavation disturbances. However, the PPV distribution in the deep underground space is significantly different from that on the outdoor ground. Therefore, it is difficult to predict the underground PPV by Sadovsky’s vibration formula. The PPV sidewall distribution characteristics were studied during site blasting in an underground cavern in the Taohuazui mine in China, and a similar numerical model was used to verify the site test data. We derived a PPV prediction formula for the underground cavern sidewall surrounding rock using a mechanical analysis model of a simply supported plate and beam in combination with dimensional analysis. The model considered derived boundary constraints, comparison with site measured data, the value predicted by Sadovsky’s vibration formula, and numerical simulation results. The results showed that the PPV distribution on the middle 1/3 section of the underground cavern sidewall showed a “platform” or “bulge” different from the curve from Sadovsky’s vibration formula. The PPV amplification coefficient in this section was distributed in a drum shape. The PPV prediction formula for the middle section of the sidewall derived in this paper was highly consistent with the data measured on-site and the numerical simulation results. The mechanical analysis model with a simply supported plate and beam included an underground cavern sidewall length–height ratio of 5 and effectively supplemented the PPV prediction formula for the middle section of the traditional underground cavern sidewall.

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“…Researchers continue to study blasting safety during construction (Jiang et al, 2020;Foderà et al, 2020;. With rapid developments in the scale and buried depth of underground excavation (Duan et al, 2017;Feng et al, 2019), the construction of a large number of underground caverns has been commenced successively, and the associated difficulties in blasting excavation construction and vibration prediction control of upright high sidewalls have been increasing (Zareifard, 2020;Sakai et al, 2020;Iwano et al, 2020;Han et al, 2020). During blasting excavation, energy propagates along the sidewall in the form of vibration waves, inducing damage to the surrounding rock and lining and leading to sidewall instability, closed function failure, and other problems.…”

Section: Introductionmentioning

confidence: 99%

PPV Distribution of Sidewalls Induced by Underground Cavern Blasting Excavation

Luo

Wei

Huang

et al. 2021

Preprint

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The peak particle velocity (PPV) is an important indicator for predicting blasting excavation disturbances. However, the PPV distribution in the deep underground space is significantly different from that on the outdoor ground. Therefore, it is difficult to predict the underground PPV by Sadovsky’s vibration formula. The PPV sidewall distribution characteristics were studied during site blasting in an underground cavern in the Taohuazui Mine in China, and a similar numerical model was used to verify the site test data. We derived a PPV prediction formula for the underground cavern sidewall surrounding rock using a mechanical analysis model of a simply supported plate and beam in combination with dimensional analysis. The model considered derived boundary constraints, comparison with site measured data, the value predicted by Sadovsky’s vibration formula, and numerical simulation results. The results showed that the PPV distribution on the middle 1/3 section of the underground cavern sidewall showed a “platform” or “bulge” different from the curve from Sadovsky’s vibration formula. The PPV amplification coefficient in this section was distributed in a drum shape. The PPV prediction formula for the middle section of the sidewall derived in this paper was highly consistent with the data measured on-site and the numerical simulation results. The mechanical analysis model with a simply supported plate and beam included an underground cavern sidewall length-height ratio of 5 and effectively supplemented the PPV prediction formula for the middle section of the traditional underground cavern sidewall.

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FDEM simulation of rock damage evolution induced by contour blasting in the bench of tunnel at deep depth

Cited by 49 publications

References 41 publications

Numerical Study of Fracture Characteristics of Deep Granite Induced by Blast Stress Wave

Numerical Study of Fracture Characteristics of Deep Granite Induced by Blast Stress Wave

PPV distribution of sidewalls induced by underground cavern blasting excavation

PPV Distribution of Sidewalls Induced by Underground Cavern Blasting Excavation

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