Numerical Investigation of the Impact of Rock Mass Properties on Propagation of Ground Vibration

نویسندگانAli Haghnejad- Kaveh Ahangari- Parviz Moarefvand- Kamran Goshtasbi
نشریهNatural Hazards
ارائه به نام دانشگاهDepartment of Mining Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
نوع مقالهFull Paper
تاریخ انتشار2019-01-01
رتبه نشریهISI (WOS)
نوع نشریهچاپی
کشور محل چاپهلند
چکیده مقاله<section id="Abs1" lang="en" tabindex="-1"> <p dir="ltr" id="Par1" style="text-align: justify;">Ground vibrations induced by the blasting of explosives can cause damage to the slope stability of mines. The important indicators of rock mass such as the geological discontinuities, physical and mechanical properties of rock can affect the creation and prediction of blast damage. This paper aims to assess the simultaneous effects of the above properties. For that purpose, peak particle velocity as the indicator of damage at two rock slopes was examined through a three-dimensional distinct element code (3DEC). The developed model simulated the dynamic pressure of detonation and provided useful results for analysis. The qualitative analysis demonstrated how significant it is to incorporate the rock mass properties in the model. Moreover, a statistical analysis was performed to quantify the effects of these properties. Therefore, the distance from blast, dip/direction of discontinuities, blast damage factor (Hoek&ndash;Brown failure criterion) and Geological Strength Index have the most influences on the slope damage, respectively. The moment failure analysis of 3DEC explained the&nbsp;<em>Shear</em>&ndash;<em>Tension</em>&nbsp;and&nbsp;<em>Shear</em>&ndash;<em>Shear</em>&nbsp;failures associated with the rock mass damage caused by blasting. The dip/direction of discontinuities plays a major role in the control or propagation of dynamic pressure and should be considered in blast damage control. If necessary, artificial discontinuities such as pre-splitting should be employed for better control and use of the favorable effects of geological discontinuities.</p> </section>

لینک ثابت مقاله

tags: Geological discontinuities; Geological Strength Index; Slope stability; Three-dimensional distinct element code; Blast damage control