Faculty of Engineering, China University of Geosciences, Wuhan 430074, P.R. China
China International Water & Electric CORP., Beijing 100011, China
Blasting vibration velocity is an important index to evaluate the stability of mine slopes under blasting operations.
In order to determine the blasting vibration safety criteria for slope rock mass scientifically and reasonably, the influence of stress waves on surficial rock mass of mine slopes was analyzed when stress waves propagate to the slope surface, and mathematical models for blasting vibration safety criteria are proposed based on the ultimate tensile stress criterion, the ultimate shear stress criterion and the Mohr-Coulomb criterion.
Results and Conclusion:
Combined with the field blasting operations during the open-pit to underground mining in Daye iron mine, the blasting vibration safety criteria is calculated. It is obtained that the blasting vibration safety criteria for the north slope and the south slope are 11.08cm/s and 10.20cm/s respectively. The results agree well with the Safety Regulations for Blasting in China and provide a reference to determine blasting vibration safety criteria for other similar projects.
Keywords: Open pit to underground, Blasting vibration, Safety criteria, Rock mass, Mining slope, Surficial rock mass.
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