MEASURING DISPLACEMENT AND CONTACT FORCES AMONG THE PARTICLES IN UNLOADING OF SLOPE BY PFC2D (PARTICLE FLOW CODE)

作者：Behbahani Seyed Saleh^*; Moarefvand Parviz; Ahangari Kaveh; Goshta**i Kamran

来源：Archives of Mining Sciences, 2013, 58(2): 495-504.

DOI：10.2478/amsc-2013-0033

• Unloading
• Discrete Element Method (DEM)
• Sliding Mass
• PFC2D

When instability is observed in the walls of open pit mining, at this time, engineers are faced with a moving mass which is a combination of materials that move on each other and on the main slip surface. Modeling of this movement can have an effective assistance to mining engineers to predict the movement behavior, displacement estimate, and the moving volumes. One of the suitable software which is capable of modeling of sliding behavior is PFC (Particle Flow Code). It is based on Discrete Element Method and released by the Itasca Company. In this paper, the modeling of sliding mass and unloading it in seven stages have been done. During the seven stages of unloading the maximum displacement and maximum contact forces among the particles are obtained. Maximum displacement happened in the fifth stage of the unloading and it is equal to 134.8 meters. Maximum contact forces occurred in the first stage of the unloading after initial equilibrium stage and it is equal to 1917 kN. The model for unloading of sliding mass presented in this paper is just an example and it is not a definite model for unloading of each sliding mass. Unloading of sliding mass depends on the situation of sliding mass and its volume and also mining limitations.

• 出版日期2013