Space-Time Effect Prediction of Blasting Vibration Based on Intelligent Automatic Blasting Vibration Monitoring System

Chen, Fan; He, Gengsheng; Dong, Shun; Zhao, Shunjun; Shi, Lin; Liu, Xian; Zhang, Baichuan; Qi, Ning; Deng, Shenggui; Zhang, Jin

doi:10.3390/app12010012

Cited by 12 publications

(3 citation statements)

References 25 publications

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“…The presence of a critical surface above point 11 leads to a reduction in the restraint, causing a significant increase in the vibration velocity at points 11 and 10. The vibration velocity at point 7 and point 6 also increases, which is due to the high-level amplification effect of vibration velocity (Chen et al, 2021). The vibration velocity of point 6 to point 1 shows a decreasing trend, indicating that the influence of standoff distance is dominant.…”

Section: Dynamic Response Characteristics Of Rigid Frame Structurementioning

confidence: 99%

Study on dynamic response and safety control of reinforced concrete rigid frame structure under foundation pit blasting

Zhang

Zhou

2022

International Journal of Protective Structures

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Subway station is usually located in the dense area of urban buildings (structures). The blasting construction of subway station foundation pit is bound to have adverse effects on adjacent buildings (structures). Therefore, it is necessary to study the dynamic response of the building (structure) and propose the safety threshold of vibration velocity. Based on the foundation pit blasting project of Hejialong Station of Wuhan Rail Transit Line 12, the vibration monitoring of the field blasting test is carried out. Combined with LS-DYNA numerical simulation software, the dynamic response characteristics of a reinforced concrete rigid frame natatorium near the foundation pit are studied, and safety thresholds for structural vibration velocities are derived. It is worth noting that the structure is a large span reinforced concrete rigid frame structure, which is different from the general reinforced concrete frame structure. The safe allowable vibration velocity in the specification is not fully applicable to the structure. Therefore, it is necessary to focus on the dynamic response of the structure under the blasting effect and propose the safety threshold of structural vibration velocity, which can provide reference for the subsequent foundation blasting. The results are as follows: Blasting seismic waves in different propagation media, their energy attenuation is different. By analyzing the vibration velocity of reinforced concrete rigid frame structures, it is found that the high-level amplification effect occurred at specific height range. In addition, the vibration velocity changes abruptly at the parts where the shape and dimensions of the rigid frame cross-section change. The peak vibration velocity and the maximum principal stress of the concrete elements were statistically analyzed to obtain the linear relationship equation, and the vibration velocity safety control threshold of the structure was predicted to be V = 5.089 cm/s.

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Section: Dynamic Response Characteristics Of Rigid Frame Structurementioning

confidence: 99%

Study on dynamic response and safety control of reinforced concrete rigid frame structure under foundation pit blasting

Zhang

Zhou

2022

International Journal of Protective Structures

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“…According to statistics, the depth of some mines in China has exceeded 1 km [1,2], and deep resource development will become a normal state [3]. Attention has also been paid to the impact of deep rock blasting on the construction environment, especially the blasting vibration caused by the impact of blasting seismic waves, which often has an impact on the surrounding environment [4][5][6][7]. According to China's Blasting Safety Regulations [8], blasting construction operations should be carried out outside the safe allowable distance, which is determined by blasting vibration speed and stratum conditions.…”

Section: Introductionmentioning

confidence: 99%

Discussion on Blasting Vibration Velocity of Deep Rock Mass Considering Thickness of Overlying Soil Layer

Ruan¹,

Wang²,

Zhao³

et al. 2023

Period. Polytech. Civil Eng.

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The thickness of the overlying soil layer has a certain influence on the blasting vibration response of deep rock mass. The vibration wave velocity of the overlying soil layer during the construction of deep blasting is measured in this paper. Based on the measured data, parameters k and α of the Sadowski equation are used to characterize the influence of the comprehensive geological conditions of the site on the vibration wave propagation. The model of blasting vibration velocity of deep rock mass is established according to the existing blasting theory, and the calculation accuracy of the model is verified according to the field blasting parameters. The new model is used to simulate different overlying soil thicknesses, and the safe allowable distance under different soil thicknesses is calculated. The calculated results show that with the increase of the thickness of the overlying soil layer, the blasting vibration velocity decreases and the attenuation velocity decreases gradually. The research results reveal the reduction effect of overlying soil thickness on blasting vibration to some extent. In the area with overlying soil layer, the safe allowable distance of blasting vibration safety can be appropriately reduced to increase the land utilization rate, which has important reference value for the blasting design and safety prediction of deep rock mass.

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“…is e ect was subsequently con rmed by more studies. In addition, research shows that the "cavity e ect" caused by blasting construction within 28 m of the tunnel cavity area is particularly obvious and the "slope e ect" and the "elevation ampli cation e ect" are also amplifying the peak vibration velocity of complex terrain [3][4][5]. e ampli cation e ect of blasting operation on the peak vibration velocity in the vertical direction of the ground surface is extremely prominent, which not only has an adverse vibration effect on the building's structures of the ground surface but also affects the stability and design of infrastructure in mountainous areas with complex terrain.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Surface Vibration Propagation in Tunnel Blasting

Guo

Xiao

Guo

et al. 2022

Mathematical Problems in Engineering

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In order to better study the propagation law of tunnel blasting in mountain landforms, taking the excavation blasting project of the Yangliu tunnel along the Yinsong expressway in Guizhou as the research object, the propagation law of vibration waves to tunnel blasting under the mountain tunnel was analyzed based on the ABAQUS finite element software and compared with the field monitoring data. The results show the peak vibration velocity of numerical simulation. Generally, the simulation value is slightly larger than the field monitoring value, but the average error of closing speed is less than 25% and the maximum error is less than 45%. The component velocity of surface peak vibration under blasting to load is the largest in the vertical direction. The “cavity effect” formed by the side-passing tunnel wall has the most significant amplification effect on the peak vibration velocity in the X direction of the rock and soil above it, which is about 1.62∼1.85 times and the resultant velocity is enlarged by 1.27∼1.45 times. Blasting vibration waves spread to the surface in the form of spherical waves inside the mountain, causing the vibration center of the surface to move to the area with lower elevation. The “cavity effect” caused by the side-through tunnel and the shift of the surface diffusion center to the lower part together led to the peak velocity of the lower measuring point of the Yangliu tunnel being much higher than that of the higher measuring point. The research results of this paper have certain reference significance in controlling the influence of underground blasting vibration on residential buildings in mountain areas.

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Space-Time Effect Prediction of Blasting Vibration Based on Intelligent Automatic Blasting Vibration Monitoring System

Cited by 12 publications

References 25 publications

Study on dynamic response and safety control of reinforced concrete rigid frame structure under foundation pit blasting

Study on dynamic response and safety control of reinforced concrete rigid frame structure under foundation pit blasting

Discussion on Blasting Vibration Velocity of Deep Rock Mass Considering Thickness of Overlying Soil Layer

Numerical Simulation of Surface Vibration Propagation in Tunnel Blasting

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