不同雨季的离子型稀土尾矿边坡失稳数值模拟与安全距离分析

Jiabo Geng^a,b, Zhisong Wang^a, Xiang Lan^a, Xiaoshuang Li^d and Dongming Zhang^a,c

^bSinosteel Maanshan General Institute of Mining Research Co., Ltd, Maanshan, China;

^cSchool of Resources and Safety Engineering, Chongqing University, Chongqing, China; 

^dSchool of Urban Construction, Changzhou University, Changzhou, China

Abstract: A significant number of ionic rare earth tailings slopes were generated during the process of rare earth mining and the factor of safety of these slopes continued to decrease under the action of rainfall. This study focussed on a specific tailings slope located in Dayu County, Ganzhou City. Through the utilization of MatDEM numerical simulation software, the variations in infiltration distribution and destabilization evolution of the tailings slope between different seasons were comparatively examined. The results indicated that during the rainy season (May to June), increased rainfall led to increased rate of water infiltration, consequently reducing the stability of the slope and exacerbating landslide damage. Furthermore, the study provided analyses of safety distances under different seasons of rainfall, taking into account the geographical location of the tailings slope in Dayu County, Ganzhou City, and the results of the analyses provided theoretical foundation into ensuring the safety of buildings and residents downstream of the slope.

Keywords: MatDEM; rainfall; safety distance; tailings landslides.

Figure 5. The initial model diagram.

Figure 8. The time-range distribution of saturation. (a) The rainy season; (b) the non-rainy season.

Figure 9. The changes in connections between discrete units during different rainy seasons: (a) the rainy season; (b)the non-rainy season.

Figure 10. Area of discrete units in the spacing areas: (a) The rainy season; (b) the nonrainy season.

Figure 11. Impact force of discrete units in the spacing areas: (a)The rainy season; (b) the nonrainy season.

Jiabo Geng, Zhisong Wang, Xiang Lan, Xiaoshuang Li & Dongming Zhang (2023) Numerical simulation and safety distance analysis of slope instability of ionic rare earth tailings in different rainy seasons, Geomatics, Natural Hazards and Risk, 14:1, 2277127, DOI:

10.1080/19475705.2023.2277127