Law of blasting vibration damage and stability analysis to slope in open-pit mine

doi:10.16265/j.cnki.issn1003-3033.2018.02.013

Abstract

Abstract: In order to explore the law of blasting vibration damage to slope in open-pit mine and improve its safety, an experimental study was carried out on the west slope of Zahanaoer open-pit mine in Huolinhe of Inner Mongolia taken as the research object. On the basis of the engineering geological survey, the slope damage degree by blasting load was quantified and a damage function on the slope blasting vibration was established by the comprehensive methods of theory analysis and mathematics calculation, then the slope destructive time was calculated and the most dangerous area was identified. Meanwhile, a slope geology model was built by using FLAC^3D finite element analysis software to analyze the slope blasting vibration damage degree. A comparison was made between the simulation results and the calculation results. The research results show that the slope damage degree is inversely proportional to the distance between the measuring point and the blasting center, and the slope damage degree experiences exponential attenuation with the increasing of blasting times, and that the slope becomes damaged after 11 consecutive blasting and the most dangerous area is 150-200 meters away from the initial blasting area.

Key words: blast vibration, slope damage, stability analysis, most dangerous area, numerical simulation

CLC Number:

X936

CAO Lanzhu, WANG Zhen, WANG Dong. Law of blasting vibration damage and stability analysis to slope in open-pit mine[J]. China Safety Science Journal, 2018, 28(2): 75-80.

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