Study on Vibration Laws of Ground Particles Cause by Shallow Tunnel Blasting Construction

In order to study ground vibration laws of shallow tunnel blasting construction, so in this paper, we put Third Bid of Qingdao Metro Line 3 as the engineering background, selecting the monitoring segment blasting vibration monitoring, studying blasting vibration peak velocity. Basing on the measured data, analyzing the variation regularity resultant velocity vector peak velocity along the tunnel axis direction. The study found that resultant velocity vector peak did not occur just above the tunnel workface, but away from the working face in 1m ~ 1.5m the range. resultant velocity vector peak located in front of the workface is 1.02 to 1.45 times of resultant velocity vector peak located behind of the workface. resultant velocity vector peak located in front of the workface is 2.26 to 2.5 times of resultant velocity vector peak above the workface. resultant velocity vector peak behind the workface is 2.3 to 3 times of resultant velocity vector peak above the workface.

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Modification of Surface Velocity Calculation Formula in Tunnel Blasting

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.199-200.882 ◽

2011 ◽

Vol 199-200 ◽

pp. 882-885

Author(s):

Hai Liang Wang ◽

Xian Bin Xue ◽

Shao Xian Li ◽

Chuan Li

Keyword(s):

Empirical Formula ◽

Ground Vibration ◽

Surface Velocity ◽

Vibration Velocity ◽

Blasting Vibration ◽

Calculation Formula ◽

Testing Method ◽

Working Face ◽

Tunnel Blasting ◽

Surface Particle

The blasting vibration in Qingdao Cross-harbor Tunnel Guide Line Project is monitored and analyzed. We discover that the surface particle vibration velocity in the range of 5metres around the working face reduces fast, and that does not conform to Sadaovsk formula. This inquiry adopts the hypothesis-fitting-testing method to modify Sadaovsk formula. The empirical formula of the ground vibration velocity caused by blasting in tunnel is obtained.

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Safety Control of Blasting Construction in New Austrian Metro Tunnel

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.446-449.2462 ◽

2012 ◽

Vol 446-449 ◽

pp. 2462-2465 ◽

Cited By ~ 1

Author(s):

Hong De Wang ◽

Xiu Feng Shen

Keyword(s):

Regression Analysis ◽

Vibration Monitoring ◽

Actual Condition ◽

Vibration Velocity ◽

Charge Weight ◽

Blasting Vibration ◽

Safety Control ◽

Blasting Excavation ◽

Tunnel Blasting ◽

Metro Tunnel

Abstract. Through the analysis and research on the vibration effect caused by the urban New Austrian (shallow embedded) metro tunnel blasting construction, the main harming effect of the blasting vibration on the surface buildings is summarized. According to the actual condition on the site of blasting construction in No.2 line of Dalian metro tunnel, the reasonable vibration monitoring plan for blasting vibration wave is established. At the same time, by means of the regression analysis about the monitoring results of blasting vibration, the vibration wave’s regression formula are set up, which can expression the correlation among the vibration velocity, the charge weight, the distance between the blasting fountains and the buildings. The results show that the Sadaovsk formula can be use to describe the effect of the metro tunnel blasting construction on the surface buildings accurately and reasonably in this construction segment. This kind of regression analysis method can be use to direct subsequent blasting excavation.

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Study on Blasting Vibration Effects of Shallow Tunnel Excavation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.250-253.2366 ◽

2011 ◽

Vol 250-253 ◽

pp. 2366-2370 ◽

Cited By ~ 2

Author(s):

Wen Xue Gao ◽

Wen Long Sun ◽

Hong Liang Deng ◽

Xi Meng Sun

Keyword(s):

Vibration Control ◽

Ground Surface ◽

Rock Fragmentation ◽

Blasting Vibration ◽

Shallow Tunnel ◽

Tunnel Excavation ◽

Surface Vibration ◽

Multi Stage ◽

Tunnel Blasting

Based on the practice of Huolang-yu tunnel of Mixing road reconstruction, this paper studies the monitoring of ground surface vibration and the technology of controlled blasting. The results show: (1) the ground surface vibration declines from constructed position to non-excavated areas along tunnel excavation direction. (2) The vibration control of wedge cutting holes blasting is the key to reduce or eliminate shallow tunnel vibrating calamity. And the replacement of the multi-stage small wedge cutting holes to the big wedge cutting holes ameliorates blasting vibration and rock fragmentation. (3) The overall monitoring of shallow tunnel blasting vibration and the effects, and optimum of the blasting design not only reduce blasting vibration but also ensure large circulation footage.

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Study on Dynamic Response and Blasting Vibration Monitoring of Small-Distance Tunnels

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.90-93.2301 ◽

2011 ◽

Vol 90-93 ◽

pp. 2301-2306

Author(s):

Zheng Guo Zhu ◽

Ming Lei Sun ◽

Yong Quan Zhu ◽

Xing Liang Sun

Keyword(s):

Dynamic Response ◽

Small Distance ◽

Surrounding Rock ◽

Vibration Monitoring ◽

Vibration Velocity ◽

Blasting Vibration ◽

Tunnel Blasting ◽

Metro Tunnel ◽

Peak Value ◽

Response Rule

In accordance with characteristics of super-small-distance tunnels in Nanjing metro, the peak value distribution of vibration velocity for existing tunnel was investigated when cut-hole blasted under the conditions of different surrounding rock Grades, followed by dynamic response rule of super-small-distance tunnels blasting. In addition, monitoring emphasis should be placed on upper bench for right tunnel blasting. Therefore, controlled measures of the small-distance tunnels were obtained during construction. Not only is the result fit for the metro tunnel, but it can be as reference for similar engineering.

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Study on Cumulative Damage of Tunnel Shotcrete under Blasting

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.268-270.796 ◽

2012 ◽

Vol 268-270 ◽

pp. 796-801

Author(s):

Hai Peng Ma ◽

Xi Bing Li ◽

Ke Bin Li ◽

Ming Can Qiu

Keyword(s):

Prediction Model ◽

Detailed Analysis ◽

Seismic Wave ◽

Cumulative Damage ◽

Vibration Monitoring ◽

Blasting Vibration ◽

Evolution Law ◽

Concrete Layer ◽

Tunnel Blasting ◽

Damage In Concrete

A prediction model of blasting vibration peak is put forward and analyzed combined with the tunnel blasting in Changxiang highway projection. The attenuation law of blasting seismic wave in tunnel and the evolution law of cumulative damage in concrete layer are discussed in the paper. Furthermore, a detailed analysis of the damage caused by blasting vibration for different bench is presented based on the increment formula of concrete cumulative damage coming from indoor experiment with the vibration monitoring data of Shizilong tunnel, which will play a guiding role for those large-span tunnel constructions in future.

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Prediction of the peak velocity of blasting vibration based on various models at Ninh Dan quarry, Thanh Ba district, Phu Tho province

Journal of Mining and Earth Sciences ◽

10.46326/jmes.2020.61(4).11 ◽

2020 ◽

Vol 61 (4) ◽

pp. 102-109

Author(s):

An Dinh Nguyen ◽

Hieu Quang Tran ◽

Bao Dinh Tran ◽

Phonepaserth Soukhanouvong ◽

Keyword(s):

Peak Velocity ◽

Mining Industry ◽

Ground Vibration ◽

Blasting Vibration ◽

Blasting Operation ◽

Surface Mines ◽

Forecasting Models ◽

Surrounding Environment ◽

Vibration Wave ◽

The Impact

In mining industry, blasting operation is effective method to fragment rocks, supporting for the next operations in surface mines such as loading, and hauling works. However, blasting operation also impacts adversely on buildings and the surrounding environment, in which the vibration wave is one of the most severe impacts. Therefore, the implementation of the forecasting models of vibration speed contributes significantly to guarantee the safety of buildings located within the impact areas of the vibration wave. This paper employs the monitoring results of blasting activity at the Ninh Dan limestone quarry situated in Thanh Ba district, Phu Tho province, to develop different forecasting models that determine the effects of the ground vibration speed in the surrounding buildings. The results show that the models USBM and Ambraseys Hendron having more accuvate prediction than other models.

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Assessment of Blasting-Induced Ground Vibration in an Open-Pit Mine under Different Rock Properties

Advances in Civil Engineering ◽

10.1155/2018/4603687 ◽

2018 ◽

Vol 2018 ◽

pp. 1-10 ◽

Cited By ~ 11

Author(s):

Zhi-qiang Yin ◽

Zu-xiang Hu ◽

Ze-di Wei ◽

Guang-ming Zhao ◽

Ma Hai-feng ◽

...

Keyword(s):

Rock Mass ◽

Ground Vibration ◽

Open Pit Mine ◽

Vibration Monitoring ◽

Open Pit ◽

Blasting Vibration ◽

Vibration Frequencies ◽

Rock Masses ◽

Vibration Signals ◽

Modified Equation

In an open-pit mine slope, rock mass has multiple joint structures and blasting operations have an obvious influence on its stability. Therefore, accurately predicting the blasting vibration is necessary to ensure slope stability. In this study, the blasting vibration signals monitored at a blasting site with different rock masses were used to investigate the attenuation characteristics of blasting vibration through the peak particle velocity (PPV), frequency characteristics, and energy distribution of the blasting vibration signals analyzed with the time-frequency processing method. The results demonstrated that the main vibration frequency of the blasting vibration of dolomite was wider than that of shale, and these main vibration frequencies occurred at 25 kHz and 14 kHz for dolomite and shale, respectively, at a distance of 50 m from the blast area to the vibration monitoring point. With an increase in the distance from 50 m to 200 m, the main vibration frequencies decreased to less than 5 Hz. With increasing joint degree, the attenuation rate of the vibration velocity and energy attenuation of the blasting vibration increase, indicating that the structural parameters of the rock mass (such as the number of joints) have a significant impact on the attenuation law of blasting vibration. Furthermore, a modified equation that can be used for predicting PPV was developed by considering the effect of the number of joints in the rock mass on the blasting vibration. For the same ground vibration readings, the correlation factor increased from 0.8 to 0.85 for the Nicholls-USBM equation and the modified equation, respectively. The PPV of blasting under different rock masses of the Baideng open-pit phosphorite mine was used to verify the modified equation. The results show that a modified equation can be used for predicting the PPV of blasting engineering in the Baideng phosphorite mine and that the prediction accuracy is acceptable.

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Blasting Vibration Damping Design and Effect Analysis in Subway Shaft Construction

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.501-504.1846 ◽

2014 ◽

Vol 501-504 ◽

pp. 1846-1849

Author(s):

Jin Kui Li ◽

De Jun Wang ◽

Yue Bo Fan

Keyword(s):

Optimization Design ◽

Ground Vibration ◽

Scientific Basis ◽

Surrounding Rock ◽

Vibration Monitoring ◽

Vibration Velocity ◽

Blasting Vibration ◽

Effect Analysis ◽

Safety Control ◽

Control Distance

Mining method inevitably causes a certain degree of damage on the shaft and surrounding rock, and severe vibration can effect on the ground buildings. The Sectional blasting design was discussed on the base of stratigraphic features, field condition and the nearest distance from surrounding buildings to Cuchun Shaft of Dalian Subway 202 construction which is taken as blasting safety control distance in this paper. The control blasting technology with short footage, weak blasting was put forward to reducing blasting vibration. The ground vibration monitoring was carried through during shaft blasting. Particle vibration velocity was from 0.28 to 1.85 cm/s and main vibration frequency was from 16.97 to 42.24 Hz at different level blasting of the surrounding rock. The monitoring results show the blasting parameters and damping measures can meet requirements of Engineering and standardization of the industry. It can provide the scientific basis and technical support for subway construction damping optimization design.

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The Influence Analysis for Yushiling Tunnel Blasting Impact on Dam

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.744-746.992 ◽

2015 ◽

Vol 744-746 ◽

pp. 992-996

Author(s):

Xiong Wei Wu ◽

Guo Fang Wu ◽

Cheng Fa Deng

Keyword(s):

Safety Assessment ◽

Small Deformation ◽

Scientific Basis ◽

Measured Data ◽

Tunnel Construction ◽

Blasting Vibration ◽

Dam Safety ◽

Measuring Point ◽

Safety Control ◽

Tunnel Blasting

This paper analyzes the measured data on Yushiling dam blast vibration which affected by blasting Yushiling Tunnel Construction,the results show that the monitoring of the dam each measuring point are below the maximum blasting vibration safety control standards, measured master oscillator frequencies greater than 20Hz, does not cause the dam resonance, vibration and shock wave generated by a small deformation of the dam, the dam did not cause abnormal deformation, the result of dam safety assessment to provide a scientific basis, and provide reference for similar projects.

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