A method for evaluating the comfort during blasting vibration based on energy absorbing principle

Yao, Qiang; Yang, Xing-guo; Li, Hongtao

doi:10.1177/1077546316685680

Cited by 7 publications

(6 citation statements)

References 21 publications

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“…As seen in this figure, the DF of blasting waves is almost in the range of 11–60 Hz, especially between 15 and 30 Hz for surface blasting in these two rock formations. Obtained results comply well with the other similar research works in this field (Kahriman, 2002; Qiang et al, 2017; Tripathy et al, 2016). The important issue is that the DF range of blasting waves in these two rock types and some different rock formations investigated by other researchers is higher than 10 Hz, which is not within the natural frequency range of the typical residential structures.…”

Section: Coupled Effects Of Frequency Velocity and Displacementsupporting

confidence: 91%

Prediction of shear strain induced by blasting waves in surface structures based on coupled frequency, velocity, and displacement effects

Nateghi

Goshtasbi

Nejati

2020

Journal of Vibration and Control

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Blasting ground vibration is an undesirable side effect of using explosives to fragment rocks. There is not any universally accepted standard to determine limitations of blast vibrations; however, velocity is the most commonly used method to measure ground vibrations. Because the structural response is highly frequency dependent, the frequency content is an essential characteristic of blast-induced shock waves along with the velocity. The magnitude of blast-induced displacement or velocity and their relative stress and strain are directly related to the quantity of charge, distance from blasting point, and geological conditions. These effects were not considered in the response spectrum theory of structures. This article tries to propose a new procedure to predict the shear displacement and relative strain for optimization of blasting patterns before the explosion. It can be accomplished by representing the effects of both velocity and frequency on the horizontal displacement of the structures based on measurements undertaken by the authors in two different rock formations. In this study, collected data were analyzed statistically to determine the coupled effects of dominant frequency, peak particle velocity, and peak particle displacement to propose a simple procedure for predicting the range of blast-induced displacement and related strain in structures.

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Section: Coupled Effects Of Frequency Velocity and Displacementsupporting

confidence: 91%

Prediction of shear strain induced by blasting waves in surface structures based on coupled frequency, velocity, and displacement effects

Nateghi

Goshtasbi

Nejati

2020

Journal of Vibration and Control

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“…rough the above analysis, it can be found that those comparison factors like crack, flatness, and damage are all related to excavation quality, whose influences are limited to the vicinity of the explosive source. Nevertheless, in practice, residents in the neighborhood are more concerned about the adverse impacts of blast-induced vibrations because they can propagate over long distances [24][25][26][27]. Hence, it is vital to investigate the vibration characteristics induced by blasting operations with two control techniques.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Presplit and Smooth Blasting Methods for Excavation of Rock Wells

Zhou

Cheng

Cai

et al. 2019

Shock and Vibration

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To understand differences of smooth and presplit blasting for the excavation of rock wells, two field experiments using these two techniques are implemented at the same test site, respectively. The ground vibrations induced by them have been monitored with the different distances through the corresponding devices. The vibration results illustrate that at the same monitoring distance and direction, peak particle velocities and dominant frequencies of vibration signals based on presplit blasting are both apparently lower than that based on smooth blasting. Meanwhile, with the increase of distance, the principle and mean frequencies based on smooth blasting always decrease, but these two frequencies based on presplit blasting might firstly decrease and then rise. In addition, frequency bands of energy distributions based on smooth blasting are more dispersive than that based on the presplit blasting at the same distance and direction. Lastly, the excavation qualities of rock wells with two techniques are also measured. The excavation results demonstrate that the contour quality and flatness of well bottom based on smooth blasting are better than that based on presplit blasting. Nevertheless, well depth based on presplit blasting is larger than that based on smooth blasting.

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“…When the blasting seismic waves are transmitted to the floor or seats that are in contact with the body, the vibration energy is transferred into the body, and the energy is transmitted along the body. Energy transfer and conversion concepts can be used to evaluate the vibration response of the human body, which is referred to as the "absorbed blasting vibration energy (ABVE)" [33]. The ABVE can be used as a parameter to characterize the interaction between humans and the vibration environment.…”

Section: Absorbed Blasting Vibration Energy (Abve)mentioning

confidence: 99%

“…Hence, the vibration signals with higher frequencies can cause a variety of bad human subjective experiences. In addition, for the vibration generated by the open-air blasting, the energy of ground motion is mainly concentrated in the high frequency band (i.e., 4∼80 Hz), which is the main component of the blasting vibration energy [33].…”

Section: Human Body Frequency-weighted Response Energymentioning

confidence: 99%

Development of Absorbed Blasting Vibration Energy Index for the Evaluation of Human Comfort in Multistorey Buildings

Yao

Yang

2017

Shock and Vibration

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There have been civil disputes and complaints regarding the negative effects of blasting vibration on buildings around the blasting site. By considering the effect of blasting vibration on a human body as a process of energy transfer and conversion, the human body absorbed blasting vibration energy (ABVE) index has been developed for comfort evaluation. Using dynamic monitoring and theoretical analysis, the elevation amplification effect and selective amplification effect on different frequency components of the ABVE have been investigated. The elevation amplification factor and selective amplification coefficients on different frequency components of the ABVE index for a typical 4-storey brick and concrete building have been determined. Based on the results, the magnitude and frequency components of the ABVE index in different parts especially in different storeys for the typical building have been determined. According to the characteristics of human body's response to vibrations of different frequencies, the frequency-based weighting method of ABVE index has been simplified. By calculating the combined effect of vibrations from all directions, the total human body ABVE and its frequency components at different floors of the building can be determined accurately. This can be used to evaluate the human body comfort against blasting vibration at different floors.

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A method for evaluating the comfort during blasting vibration based on energy absorbing principle

Cited by 7 publications

References 21 publications

Prediction of shear strain induced by blasting waves in surface structures based on coupled frequency, velocity, and displacement effects

Prediction of shear strain induced by blasting waves in surface structures based on coupled frequency, velocity, and displacement effects

Comparison of Presplit and Smooth Blasting Methods for Excavation of Rock Wells

Development of Absorbed Blasting Vibration Energy Index for the Evaluation of Human Comfort in Multistorey Buildings

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