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Stope safety analysis based on blasting vibration velocity evolution law

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  • Yinshan Mining Co.,Ltd.of JiangXi Copper Corporation Limited|Yongping Copper Mine of Jiangxi Copper Corporation Limited|School of Resources and Safety Engineering,Central South University
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Abstract:

In the process of recovering metal ore resources,underground stope blasting poses a serious threat to the stability of surface structures (buildings),dams,and slopes,especially for open-pit joint development of mines with high and steep slopes.In this paper,based on the contradiction between the mining and blasting of the underground ore body faced by the Yongping Copper Mine and the stability of the nearby high and steep slopes,the vibration monitoring of the surface and underground blasting is carried out.The particle vibration characteristics and vibration velocity attenuation law caused by blasting are obtained based on vibration velocity statistical analysis principles and the Sadovsky formula,and it is concluded that the maximum vibration velocity measured at most measuring points is generally distributed in 0-1 cm/s,and the main frequency is distributed in 0-150 Hz.According to the blasting seismic wave attenuation law of the slope rock mass and the local seismic intensity,the maximum charge per section allowed for the production of the No.IV ore body in different stopes is determined,which provides a theoretical and practical basis for the safe production of the mine.

Keywords:

blasting;blasting vibration;vibration velocity;vibration monitoring;slope;safety