Comparison of vibrations induced by excavation of deep-buried cavern and open pit with method of bench blasting

Lu, Wenbo; Li, Peng; Chen, Ming; Zhou, Chuangbing; Da-qiang, Shu

doi:10.1007/s11771-011-0892-2

Cited by 17 publications

(6 citation statements)

References 11 publications

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“…It is found by Wang and Huang, and Xu et al that, release rate and dynamic disturbance have great influence on the occurrence and extent of rockburst [28,29]. Our preparatory work also indicated that the transient release of in-situ stress induced release wave plays an important part in total vibration in surrounding rock mass [30,31].…”

Section: Introductionsupporting

confidence: 61%

Dynamic response of rock mass induced by the transient release of in-situ stress

Yang

Peng

et al. 2012

International Journal of Rock Mechanics and Mining Sciences

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157

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Section: Introductionsupporting

confidence: 61%

Dynamic response of rock mass induced by the transient release of in-situ stress

Yang

Peng

et al. 2012

International Journal of Rock Mechanics and Mining Sciences

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157

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“…e PPV is larger in the dolomite than in the shale for a constant scaled distance. Lu et al [30] reported that the total energy of a blast-induced seismic activity is directly proportional to the square of the PPV during the same blasting. erefore, more explosive energy was converted to rock mass vibration in the dolomite bench than that in the shale bench.…”

Section: Attenuation Law For the Ppv Of Blasting Vibrationmentioning

confidence: 99%

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

Yin

Wei

et al. 2018

Advances in Civil Engineering

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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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“…Whereas, for the open-pit blasting, the time-energy density curve only has one peak group. Studies by Lu et al. (2011) shown that the two excitation sources are induced not by the delay errors of detonators but the blasting load and TRIS.…”

Section: A Practical Application Of Prediction Modelmentioning

confidence: 99%

“…Figure 12 shows that for each single delay, vibration has two dominant frequencies, and without exception, 180 Hz is their identification point. However, for the case of open-pit blasting, vibration has only one dominant frequency (Lu et al., 2011). This indicates that the coupled vibrations which have two dominant frequencies originate from the two excitation energy sources, the blasting load and TRIS.…”

Section: A Practical Application Of Prediction Modelmentioning

confidence: 99%

“…Whereas, for the open-pit blasting, the time-energy density curve only has one peak group. Studies by Lu et al (2011) shown that the two excitation sources are induced not by the delay errors of detonators but the blasting load and TRIS. Therefore, compared with the open-pit blasting vibration which only has one excitation source, blasting load, the coupled vibration recorded during the deep rock mass excavation has two energy sources, the blasting load and the TRIS.…”

Section: Identification and Separation Of Tris Induced Vibrationsmentioning

confidence: 99%

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Development of a model to predict vibrations induced by transient release of in-situ stress

Fan

Yang

et al. 2015

Journal of Vibration and Control

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During the process of deep rock mass excavations by drill and blast, transient release of in-situ stress (TRIS) induced vibrations have a negative effect on the safety and stability of nearby structures. However, little attention has been focused on the prediction of peak particle velocity (PPV) of TRIS induced vibrations. To forecast the PPV of TRIS induced vibrations, a new model was set up by dimensional analysis method based on an analysis of PPV influencing factors. To train and test the prediction model proposed in this paper, firstly, TRIS induced vibrations were identified and separated from the recorded vibrations during a blasting excavation of deep rock masses in the Jinping II hydropower station by the methods of amplitude spectrum analysis and finite impulse response digital filter, and then, unknown coefficients in the proposed model were calculated via multivariate regression analysis from the collected data of upper part excavation. Finally, for the lower part excavation, the separated and predicted PPV of TRIS induced vibrations were compared. In addition, the correlation coefficient and root mean square error (RMSE) were compared between the proposed model and the other commonly used model. Results seem to indicate that the proposed model with a higher correlation coefficient and a smaller RMSE is the better option for predicting the PPV of TRIS induced vibrations.

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Comparison of vibrations induced by excavation of deep-buried cavern and open pit with method of bench blasting

Cited by 17 publications

References 11 publications

Dynamic response of rock mass induced by the transient release of in-situ stress

Dynamic response of rock mass induced by the transient release of in-situ stress

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

Development of a model to predict vibrations induced by transient release of in-situ stress

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