Investigation into the effect of fault properties on wave transmission |
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| Authors: | HR Mohammadi H Mansouri M Bahaaddini H Jalalifar |
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| Institution: | 1. Rock Mechanics Division of Golgohar Iron Ore Mine, Sirjan, Iran;2. Shahid Bahonar University of Kerman, Kerman, Iran;3. Higher Education Complex of Zarand, Shahid Bahonar University of Kerman, Kerman, Iran;4. School of Mining Engineering, UNSW Australia, Sydney, NSW, Australia |
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| Abstract: | The estimation of wave transmission across the fractured rock masses is of great importance for rock engineers to assess the stability of rock slopes in open pit mines. Presence of fault, as a major discontinuity, in the jointed rock mass can significantly impact on the peak particle velocity and transmission of blast waves, particularly where a fault contains a thick infilling with weak mechanical properties. This paper aims to study the effect of fault properties on transmission of blasting waves using the distinct element method. First, a validation study was carried out on the wave transmission across a single joint and different rock mediums through undertaking a comparative study against analytical models. Then, the transmission of blast wave across a fault with thick infilling in the Golgohar iron mine, Iran, was numerically studied, and the results were compared with the field measurements. The blast wave was numerically simulated using a hybrid finite element and finite difference code which then the outcome was used as the input for the distinct element method analysis. The measured uplift of hanging wall, as a result of wave transmission across the fault, in the numerical model agrees well with the recorded field measurement. Finally, the validated numerical model was used to study the effect of fault properties on wave transmission. It was found that the fault inclination angle is the most effective parameter on the peak particle velocity and uplift. Copyright © 2017 John Wiley & Sons, Ltd. |
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| Keywords: | fault wave transmission numerical modelling peak particle velocity Golgohar mine |
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