Damage-vibration couple control of rock mass blasting for high rock slopes

Hu, Yingguo; Liu, Mei-shan; Wu, Xinxia; Zhao, Guangzhou; Li, Peng

doi:10.1016/j.ijrmms.2018.01.028

Cited by 34 publications

(12 citation statements)

References 24 publications

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“…The relationship between the parameter and rock damage is then examined so that damage size can be measured for each parameter value. Peak ground velocity and borehole pressure are assumed as two parameters widely used for this purpose [50]. Analytical approaches based on PPV and borehole pressure are discussed in Sections 4.1.1 and 4.1.2, respectively.…”

Section: Analytical Approachmentioning

confidence: 99%

Estimation of Damage Induced by Single-Hole Rock Blasting: A Review on Analytical, Numerical, and Experimental Solutions

et al. 2020

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This paper presents a review of the existing models for the estimation of explosion-induced crushed and cracked zones. The control of these zones is of utmost importance in the rock explosion design, since it aims at optimizing the fragmentation and, as a result, minimizing the fine grain production and recovery cycle. Moreover, this optimization can reduce the damage beyond the set border and align the excavation plan with the geometric design. The models are categorized into three groups based on the approach, i.e., analytical, numerical, and experimental approaches, and for each group, the relevant studies are classified and presented in a comprehensive manner. More specifically, in the analytical methods, the assumptions and results are described and discussed in order to provide a useful reference to judge the applicability of each model. Considering the numerical models, all commonly-used algorithms along with the simulation details and the influential parameters are reported and discussed. Finally, considering the experimental models, the emphasis is given here on presenting the most practical and widely employed laboratory models. The empirical equations derived from the models and their applications are examined in detail. In the Discussion section, the most common methods are selected and used to estimate the damage size of 13 case study problems. The results are then utilized to compare the accuracy and applicability of each selected method. Furthermore, the probabilistic analysis of the explosion-induced failure is reviewed using several structural reliability models. The selection, classification, and discussion of the models presented in this paper can be used as a reference in real engineering projects.

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Section: Analytical Approachmentioning

confidence: 99%

Estimation of Damage Induced by Single-Hole Rock Blasting: A Review on Analytical, Numerical, and Experimental Solutions

et al. 2020

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“…waves, formation and propagation of blasting cracks and fracturing effects of rock masses induced by blasting. At present, scholars have conducted much research into the blasting of rock masses (Chen and Zhao, 1998;An et al, 2017;Bendezu et al, 2017;Hu et al, 2018). Donze et al (1997) carried out a numerical simulation of blasting in two-dimensional rock plates and described the fracture process in detail.…”

Section: Characteristics Of Jointed Rock Masses 1835mentioning

confidence: 99%

Numerical simulation of fracture characteristics of jointed rock masses under blasting load

Liu

Yang

Han

et al. 2019

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Purpose To study fracture characteristics of jointed rock masses under blasting load, the RFPA2D analysis software for dynamic fracture of rocks based on the finite element method and statistical damage theory was used. Design/methodology/approach On this basis, this research simulated the fracture process of rock masses in blasting with different joint geometrical characteristics and mainly analysed the influences of distance from joints to blasting holes, the length of joints, the number of joints and joint angle on fracture of rock masses. Findings The calculation results show that with the constant increase of the distance from joints to blasting holes, the influences of joints on blasting effects of rock masses gradually reduced. Rock masses with long joints experienced more serious damages than those with short joints. Damages obviously increased with the changing from rock masses without joints to rock masses with joints, and when there were three joints, the further increase of the number of joints had unobvious changes on blasting effects of rock masses. Joints showed significant guidance effect on the propagation of cracks in blasting: promoting propagation of main vertical cracks deflecting to the ends of joints. Originality/value The research results are expected to provide some theoretical bases in practical application of engineering blasting.

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“…Plenty of mechanical tests considering variable stress amplitude conditions have been performed on rock 26–28 . The pre‐existing rock engineering examples demonstrate that not only the stress amplitude but also the loading frequency is varied and not constant 29,30 . Therefore, multiple fatigue loading frequency bands coexist in the rock engineering, such as open pit mining rock engineering, deep rock engineering, hydropower rock engineering, and petroleum rock engineering.…”

Section: Introductionmentioning

confidence: 99%

Fatigue failure identification using deformation and energy rate for hole‐fissure contained granite under freeze–thaw and variable‐frequency–variable‐amplitude cyclic loads

Wang

Zhu

et al. 2021

Fatigue Fract Eng Mat Struct

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This work conducted laboratory tests considering the coupled freeze–thaw (FT) and variable‐frequency–variable‐amplitude cyclic loads on granite containing two fissures and a circular hole. The analysis is dedicated to reveal the deformation and energy rate characteristics. Testing results show that increasing FT cycle and loading level both accelerate rock damage. The rock subjecting to high FT cycle behaves much larger damage rate in terms of volumetric strain and dissipated energy. The warning strength is defined according to the volumetric strain rate and dissipated energy rate which can early issue a warning than the crack damage stress point. In addition, the rock instability precursor is proposed by monitoring the incremental rate of the radial strain and volumetric strain; drastic damage occurs when the volumetric rate exceeds the radial rate. Three typical crack coalescence modes of double shear coalescence, single shear coalescence, and single tensile coalescence were revealed.

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Damage-vibration couple control of rock mass blasting for high rock slopes

Cited by 34 publications

References 24 publications

Estimation of Damage Induced by Single-Hole Rock Blasting: A Review on Analytical, Numerical, and Experimental Solutions

Estimation of Damage Induced by Single-Hole Rock Blasting: A Review on Analytical, Numerical, and Experimental Solutions

Numerical simulation of fracture characteristics of jointed rock masses under blasting load

Fatigue failure identification using deformation and energy rate for hole‐fissure contained granite under freeze–thaw and variable‐frequency–variable‐amplitude cyclic loads

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