Investigation of Fault Effect on Blast-Induced Vibration

Gönen, Alper

doi:10.3390/app12052278

Cited by 4 publications

(1 citation statement)

References 18 publications

(22 reference statements)

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“…Some scholars take incomplete rock as the point of analysis and find that the existence of some joints, holes, and faults will have a more significant impact on blasting. The incompleteness of the rock body at the critical location will even seriously affect the effect of rock breaking [17][18][19][20][21][22] . Regarding other engineering levels, Yuan et al 23 provided a methodological basis for increasing the mining rate of uranium ore by using blasting and fracturing techniques to expand the tiny cracks in the rock body and increase the permeability of uranium-bearing sandstone.…”

Section: Introductionmentioning

confidence: 99%

Analysis of blasting characteristics of interbedded rock mass based on particle expansion method

Xu,

Xie,

Liu

et al. 2023

Preprint

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In engineering, blasting is often used to achieve engineering purposes. Still, more studies are limited to a single rock layer, and there are few details on complex rock layers, such as interbedded rock bodies. This paper analyses the effects of the blasting environment, layer thickness, and inclination angle on the blasting effect from the levels of reflected stress, cracking state, and contact resultant force with the help of the particle expansion method. It is found that: (i) The blasting environment and layer thickness greatly influence the blasting effect, while the inclination angle has a minor influence. (ii) When the layer thickness in a hard rock environment is less than seven times the radius of the crushing zone, the reflective stress near the contact surface increases with the layer thickness, conversely, it decreases. (iii) For hard rock environments with layer thicknesses up to 3 times the radius of the crushing zone, the number of cracks increases with layer thickness at a rate of 68% per meter, conversely, it decreases at a rate of 6.5% per meter. For soft rock environments with layer thicknesses up to 1 times the radius of the crushing zone, the number of cracks decreases at a rate of 112% per meter with layer thickness. It increases at a rate of 10% per meter for layers between 1 and 2 times the radius of the crushing zone. (iv) The average contact resultantforce increases at a rate of 15.4% per meter when the layer thickness gradually increases to 10 times the radius of the crushing zone for hard rock environments and decreases at a rate of 51.7% per meter when the layer thickness increases to 1.5 times the radius of the crushing zone for soft rock environments, and converges if the layer thicknesses continue to increase for both soft rock and hard rock environments.

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Section: Introductionmentioning

confidence: 99%

Analysis of blasting characteristics of interbedded rock mass based on particle expansion method

Xu,

Xie,

Liu

et al. 2023

Preprint

View full text Add to dashboard Cite

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Research on the Prediction Model of Blasting Vibration Velocity in the Dahuangshan Mine

Guo

Zhang

Xie³

et al. 2022

Applied Sciences

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In order to improve the prediction accuracy of blast vibration velocity, the model for predicting the peak particle velocity of blast vibration using the XGBoost (Extreme Gradient Boosting) method is improved, and the EWT–XGBoost model is established to predict the peak particle velocity of blast vibration by combining it with the EWT (Empirical Wavelet Transform) method. Calculate the relative error and root mean square error between the predicted value and measured value of each test sample, and compare the prediction performance of the EWT–XGBoost model with the original model. There is a large elevation difference between each vibration measurement location of high and steep slopes, but high and steep slopes are extremely dangerous, which is not conducive to the layout of blasting vibration monitoring equipment. The vibration velocity prediction model adopts the numerical simulation method, selects the center position of the small platform as the measurement point of the peak particle velocity, and studies the variation law of the blasting vibration velocity of the high and steep slopes under the action of top blasting. The research results show that the EWT–XGBoost model has a higher accuracy than the original model in the prediction of blasting vibration velocity; the simultaneous detonation method on adjacent high and steep slopes cannot meet the relevant requirements of safety regulations, and the delayed detonation method can effectively reduce the blasting vibration of high and steep slopes. The shock absorption effect of the elevation difference within 45 m is obvious.

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Energy Generation and Attenuation of Blast-Induced Seismic Waves under In Situ Stress Conditions

et al. 2022

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During blasting in deep mining and excavation, the rock masses usually suffer from high in situ stress. The initial seismic energy generated in deep rock blasting and its attenuation with distance is first theoretically analyzed in this study. Numerical modeling of the multiple-hole blasting in a circular tunnel excavation under varied in situ stress conditions is then conducted to investigate the influences of in situ stress levels and anisotropy on the blasting seismic energy generation and attenuation. The case study of the deep rock blasting in the China Jinping Underground Laboratory (CJPL) is finally presented to demonstrate the seismic energy attenuation laws under varied in situ stress levels. The results show that with the increase in the in situ stress level, the explosive energy consumed in the rock fracture is reduced, and more explosive energy is converted into seismic energy. The increasing in situ stress causes the seismic Q of the rock mass medium to first increase and then decrease, and consequently, the seismic energy attenuation rate first decreases and then increases. Compared to the condition without in situ stress, the blasting seismic energy decays more slowly with distance under in situ stress. Then the seismic waves generated in deep rock blasting are more likely to reach and exceed the peak particle velocity (PPV) limits stipulated in the blasting vibration standards. Under non-hydrostatic in situ stress, the generation and attenuation of the blasting seismic energy are anisotropic. The highest seismic energy density is generated in the rock mass in the minimum principal stress orientation. Its attenuation is dependent upon the in situ stress aligning the wave propagation orientation.

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Investigation of Fault Effect on Blast-Induced Vibration

Cited by 4 publications

References 18 publications

Analysis of blasting characteristics of interbedded rock mass based on particle expansion method

Analysis of blasting characteristics of interbedded rock mass based on particle expansion method

Research on the Prediction Model of Blasting Vibration Velocity in the Dahuangshan Mine

Energy Generation and Attenuation of Blast-Induced Seismic Waves under In Situ Stress Conditions

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