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The blocking efficiency of slag blocking wall of the waste slag yard based on PFC2D

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Abstract

As a site for concentrated accumulation of slag, the waste slag yard is often large. Sliding can cause serious damage to nearby residents and infrastructure. In order to explore the law of sliding movement of the waste slag yard, the discrete element software PFC2D was used to study the blocking efficiency of the slag blocking walls in the waste slag yard. First, calibrate the meso-parameters of the slag material through a biaxial compression test of numerical simulation. Then, a numerical model of the waste slag yard is established, and four different slag blocking wall conditions are designed. Finally, the sliding simulation of the waste slag yard is carried out and the relevant data are monitored, the blocking efficiency of the slag blocking wall is analyzed from the aspects of particle displacement, particle velocity, and force and energy. The results show that the particle’s moving speed is greater and stable when there is no slag blocking wall. The entire movement process can be divided into four stages, i.e., rapid sliding, temporary stability, secondary sliding and stable. Among three different structures of slag blocking wall, the blocking efficiency of 90° slag blocking wall is the best, and the 45° slag blocking wall and the 60° slag blocking wall have different advantages. The sliding displacement of the 45° slag blocking wall is small, but the force is large. The sliding displacement of the 60° slag blocking wall is large, but the force is small.

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Authors and Affiliations

  1. Faculty of Transportation Engineering, Kunming University of Science and Technology, Kunming, 650500, China

    Rong Sun, Yuqiong He, Yinsheng Wang & Bo Li

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  1. Rong Sun
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Sun, R., He, Y., Wang, Y. et al. The blocking efficiency of slag blocking wall of the waste slag yard based on PFC2D. Comp. Part. Mech. 10, 387–396 (2023). https://doi.org/10.1007/s40571-022-00503-8

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