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Simulation and analysis of earthquake stability for open-pit coal mine slope with complex structural surface

CUI Tiejun;MA Yundong;WANG Laigui;College of Safety Science and Engineering,Liaoning Technical University;Key Laboratory of Mine Thermodynamic Disasters and Control of Ministry of Education;Tunnel & Underground Structure Engineering Center of Liaoning,Dalian Jiaotong University;School of Mechanics and Engineering,Liaoning Technical University;  
To understand the slope stability with steeply inclined seam and horizontal fracture in the process of earthquake,which is simulated on the basis of PFC3 D according to particle flow theory. The discontinuity and continuity of rock mass structure form are simulated with the JSET and Bonds in PFC3 D. When the motion peak acceleration is 0. 2 g,0. 3 g,0. 4 g or 0. 5 g,the slope internal cracks and particle displacement are obtained at 8 s,14 s,20 s and the final stable time. The simulation of the phenomenon is summed up: when a is low,there is only one zone for the slope fault firstly. With the increase of a or the duration of shaking,the inverse slope rupture zone appears with the same spacing. It begins at vibration applying position and ends at free surface of the slope. This reveals the complete change of the original structures of the slope.
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