矿渣堆填区失稳过程研究：以辽宁省阜新市南环路路基滑坡为例

Aoxun Wang¹; Yongfu Xu²; and Hailiang Liu³

¹Ph.D. Student, School of Naval Architecture, Ocean, and Civil Engineering, Shanghai Jiao Tong Univ., Shanghai 200240, China. 

²Professor, School of Naval Architecture, Ocean, and Civil Engineering,Shanghai Jiao Tong Univ.,Shanghai 200240, China (corresponding author). 

³Ph.D. Student, College of Construction Engineering, Jilin Univ.,Changchun 130012, China.

Abstract: The management and knowledge of landfills are generally inadequate and could lead to significant catastrophes. This is particularly concerning for solid waste landfills due to their large size and potential to threaten nearby structures and residents in the event of landslides. In this paper, we investigated a backfill landslide induced by road construction in a coal mine slag landfill. Our analysis of satellite images and field surveys revealed that the alteration of the mounding morphology at the slope’s crest by construction triggered the landslide. We established an engineering geological model of the main sliding plane and utilized the discrete-element program MatDEM to reproduce the landslide’s development and predict its final accumulation pattern and impact range. Our study highlights the potential dangers of engineering construction carried out on relatively stable solid landfills. The combined in situ and numerical analysis research methods employed in this study can provide important references for risk assessment and treatment measures.

Keywords: Slag landfills; Failure mechanism; Discrete-element methods; Instability process; Landslides.

Fig. 4. Map of Fuxin landslide: (a) remote sensing photo of landslide (image by Hailiang Liu); (b) geological cross-section along profile line I-I; and(c) subgrade damage; (d) steep canyon; (e) surface uplift; (f) drunken trees; (g) subsidence area; (h) vertical cracks; (i) damaged fence; ( j) horizontal cracks; and (k) radiating cracks photos of typical features marked in (a). [Images (c-k) by Aoxun Wang.]

Fig. 5. Characteristics of the exposed soil and rock masses in the boreholes.

Fig. 9. Discrete-element model of Fuxin landslide.

Fig. 10. Displacement field during the process of landslide: (a) T = 2.44 s; (b) T = 31.68 s; (c) T = 60.96 s; and (d) T = 90.24 s.

Fig. 11. Velocity distribution during the process of landslide: (a) T = 2.44 s; (b) T = 31.68 s; (c) T = 60.96 s; and (d) T = 90.24 s.

Fig. 12. Numerical result along profile I-I.

WANG A X, XU Y F, LIU H L 2023. Study on Instability Process of Slag Landfills: Example of the Subgrade Landslide on Fuxin Nanhuan Road in Liaoning, China. Journal of Performance of Constructed Facilities [J], 37: 11.

DOI:10.1061/JPCFEV.CFENG-4217

来源：矩阵离散元MatDEM