A New Approach to Represent Impact of Discontinuity Spacing and Rock Mass Description on the Median Fragment Size of Blasted Rocks Using Image Analysis of Rock Mass

Azizi, Ali; Moomivand, Hassan

doi:10.1007/s00603-020-02360-4

Cited by 36 publications

(7 citation statements)

References 39 publications

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“…Similar block size determination technique has been applied by several blast researchers (e.g. Hudaverdi et al 2012, Azizi andMoomivand 2021). This research focuses on flyrock.…”

Section: Methodsmentioning

confidence: 95%

Prediction of flyrock throw distance in quarries by variable selection procedures and ANFIS modelling technique

Hudaverdi

2021

Preprint

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This study suggests application of variable reduction procedures for flyrock prediction. It was aimed to create robust and non-complex predictive models. Eleven operational blast parameters and rock mass properties were measured in an aggregate quarry. Dominant parameters for flyrock occurrence were determined by multivariate statistical methods. Two parallel ANFIS models were developed for flyrock prediction. The first ANFIS model was constructed based on the results of stepwise regression. Burden-hole diameter ratio, in-situ block size and specific charge are the input parameters of ANFIS 1. The second ANFIS model was created based on the results obtained by factor analysis. Burden-hole diameter ratio, bench height- burden ratio, number of holes and charge weight are used as input parameters for ANFIS 2. The calculated mean absolute percentage errors are lower than eight percent for the ANFIS predictions. The median absolute errors are lower than 5 meters. The study also investigates alternative accuracy measures to evaluate forecasting performance. Standardized errors, normalized errors and Nash–Sutcliffe Efficiency (NSE) were found to be useful for model validation. It is concluded that more than a single model can be created for a specific site. Pre-statistical analysis for variable reduction increases performance of the predictive models. Burden appeared to be a significant parameter for flyrock throw.

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“…Similar block size determination technique has been applied by several blast researchers (e.g. Hudaverdi et al 2012, Azizi andMoomivand 2021). This research focuses on flyrock.…”

Section: Methodsmentioning

confidence: 95%

Prediction of flyrock throw distance in quarries by variable selection procedures and ANFIS modelling technique

Hudaverdi

2021

Preprint

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“…The influence of the structural plane on the propagation of the blasting crack is related to the properties of the rock mass on both sides of the structural plane, the filling medium, and the thickness 19 – 21 . This paper mainly discusses the influence of the relative position of the structural plane from the blasting hole to the blasting effect.…”

Section: Calculation Model Establishment and Parameter Settingmentioning

confidence: 99%

Damage evolution law of multi-hole blasting igneous rock and quantitative evaluation model of damage degree based on fractal theory and clustering algorithm

Zhao,

Tu,

Miao

et al. 2024

Sci Rep

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The geological phenomenon of igneous rock invading coal seam is widely distributed, which induces mining risk and affects efficient mining. The pre-splitting blasting method of igneous rock is feasible but difficult to implement accurately, resulting in unnecessary safety and environmental pollution risks. In this paper, the blasting model with penetrating structural plane and the multi-hole blasting model with different hole spacing were established based on the Riedel–Hiermaier–Thoma (RHT) damage constitutive to explore the stress wave propagation law under detonation. The damage cloud diagram and damage degree algorithm were used to quantitatively describe the spatio-temporal evolution of blasting damage. The results show that the explosion stress wave presents a significant reflection stretching effect under the action of the structural plane, which can effectively aggravate the presplitting blasting degree of the rock mass inside the structural plane. The damage range of rock mass is synchronously evolved with the change of blasting hole spacing. The blasting in the igneous rock intrusion area of the 21,914 working face is taken as an application example, and the damage degree of rock mass is reasonably evaluated by the box-counting dimension and K-means clustering method, which proves the effectiveness of the blasting scheme and provides reference value for the implementation of related blasting projects.

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“…As a result, it is critical to conduct research into the relationship between small scale mine operation powder factor and blast induce effect such as ground vibration and noise, as this is a step forward to a stable rock excavation and mine sustainability. Similarly, knowing full well that explosive fragmentation of rock mass results in wave propagation, which causes the development of micro fractures in the unblast insitu rock [19], it is critical to evaluate the stability condition of the mine face based on the effect of the discontinuities. The rst section of this paper investigates mine blast induced effect rate, using visualize model chart to determine the relationship between Powder factor, blast induced ground vibration, and noise level in small scale mine, while the nal section investigates case study mine slope stability using Kinematic analysis technique on Dips software, slope mass rating (SMR), and rock mass rating (RMR).…”

Section: Introductionmentioning

confidence: 99%

Quarry Slope Stability Assessment Methods with Blast Induced Effect Monitoring in Akoko Edo, Nigeria

et al. 2023

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Blast-induced noise and ground vibrations are two of the most signi cant challenges in blast rock fragmentation, and they can have an impact on mine stability and the safety of personnel and machines nearby. As a result, evaluating the slope stability and the contribution of powder factor on ground vibration and noise induced by blasting in small scale mines plays an important role in improving mine sustainability. The results of slope stability assessment and the effect of explosive charge on blast induced ground vibration and noise level at selected carbonate rock quarries in Akoko Edo, Nigeria are presented in this paper. The purpose of this research is to examine the slope stability of a mine using kinematic analysis and slope mass rating techniques, as well as to determine the relationship between powder factor and ground vibration and noise caused by blasting. According to the study results, the average blast induced noise and ground vibration from the nine blast rounds are 123-151 Kb and 2.43 mm/s to 5.03 mm/s, respectively. According to the ndings, the powder factor has a positive relationship with blast-induced ground vibration and noise level. The ndings also show that the results of SMR and kinematic slope analysis techniques are similar with less variation and can be used to assess slope stability in practice.

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A New Approach to Represent Impact of Discontinuity Spacing and Rock Mass Description on the Median Fragment Size of Blasted Rocks Using Image Analysis of Rock Mass

Cited by 36 publications

References 39 publications

Prediction of flyrock throw distance in quarries by variable selection procedures and ANFIS modelling technique

Prediction of flyrock throw distance in quarries by variable selection procedures and ANFIS modelling technique

Damage evolution law of multi-hole blasting igneous rock and quantitative evaluation model of damage degree based on fractal theory and clustering algorithm

Quarry Slope Stability Assessment Methods with Blast Induced Effect Monitoring in Akoko Edo, Nigeria

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