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Effect of Underground Mine Blast Vibrations on Overlaying Open Pit Slopes: A Case Study for Daye Iron Mine in China

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Abstract

Investigating the propagation and attenuation of blast vibration in rock slopes is the key point to assess the influence of underground mine blasting on overlaying open pit slopes stability and determining the potential risk. In this paper, Daye Iron Mine in China has been chosen as the case to study the effect of blast vibrations on overlaying open pit slopes due to underground mine blast. Firstly, the characteristics of blast loadings are analyzed by the dynamic finite element method. Then, a three dimensional (3D) numerical model of the open pit and the underground mine is made, which is verified by the field monitoring data to prove its reliability. The effect of blast vibration on overlaying open pit slope due to underground mine blasting are discussed based on the peak particle velocity (PPV) and the peak effective tensile stress (PETS) distribution characteristics which are calculated and analyzed by inputting the obtained blast vibration data into the numerical model. The results show that the effect of present mining blasting on the stability of pit slopes are limited because the simulated maximum PPV and PETS of monitoring point on slopes are all < 0.747 cm/s and 0.738 MPa. At last, according to numerical simulations of the underground mine blasting, the PPV predicting formulas for the slopes in Daye Open Pit Iron Mine is proposed based on the classic Sadaovsk formula.

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Acknowledgements

The study was sponsored by the National Natural Science Foundation of China (Grant Nos. 41372312 and 51379194), the Fundamental Research Funds for the Central Universities of China University of Geosciences (Wuhan) (Grant No. CUGL140817), the Natural Science Foundation of Hubei Province of China (Grant No. 2014CFB894) and the China Postdoctoral Science Foundation (Grant No. 2014M552113).

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  1. Faculty of Engineering, China University of Geosciences, No. 388, Lumo Road, Wuhan, 430074, Hubei, China

    Nan Jiang, Chuanbo Zhou, Shiwei Lu & Zhen Zhang

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  1. Nan Jiang
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  2. Chuanbo Zhou
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  3. Shiwei Lu
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  4. Zhen Zhang
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Correspondence to Chuanbo Zhou.

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Jiang, N., Zhou, C., Lu, S. et al. Effect of Underground Mine Blast Vibrations on Overlaying Open Pit Slopes: A Case Study for Daye Iron Mine in China. Geotech Geol Eng 36, 1475–1489 (2018). https://doi.org/10.1007/s10706-017-0402-x

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