Numerical simulation and safety distance analysis of slope instability of ionic rare earth tailings in different rainy seasons

Figures & data

Figure 1. Location of the tailings in Zuo Ba town.

Figure 2. The process of numerical analysis.

Table 1. Mechanical parameters of real materials and discrete units.

	Type	$\mathit{E}$ (GPa)	$\mathit{v}$	${\mathit{C}}_{\mathit{\mu }}$(MPa)	${\mathit{T}}_{\mathit{u}}$(MPa)	${\mathit{\mu }}_{\mathbf{i}}$
Actual material	Tailings	30.6	0.23	15.3	3.5	0.42
	Granite	65.2	0.27	202.8	20.6	0.72
Discrete units	Layer1	11.01	0.23	2.75	0.63	0.42
	Layer2	23.47	0.27	36.50	3.71	0.72

Table 2. The microscopic mechanical parameters of discrete units.

	${\mathit{K}}_{\mathit{n}}$(GN·m^-1)	${\mathit{K}}_{\mathit{s}}$(GN·m^-1)	${\mathit{X}}_{\mathit{b}}$(m)	${\mathit{F}}_{\mathit{so}}$(GN)	${\mathit{u}}_{\mathit{p}}$
Layer 1	182.3	63.8	1.75*10^-3	1.01	0.045
Layer 2	392.5	137.8	4.77*10^-3	2.78	0.076

Figure 3. The average rainfall in Ganzhou city.

Figure 4. The particle size distribution.

Figure 5. The initial model diagram.

Figure 6. The variation of the degree of saturation at vertical monitoring points. (a)The rainy season; (b) the non-rainy season.

Figure 7. The variation of the degree of saturation of horizontal monitoring points. (a) The rainy season; (b)the non-rainy season.

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.

Table 3. The safety distance analysis for landslides.

Seasons	Data contents	7–9 (m)	9–11 (m)	11–13 (m)	13–15 (m)	15–17 (m)	17–19 (m)
The rainy season	The average height/m	1.355	1.28	0.965	0.716	0.713	0.712
	Results	>0.9	>0.9	>0.9	<0.9	<0.9	<0.9
	Impact force/kPa	502.6	445.01	356.72	336.1	148.2	155.52
	Results	>100	>100	>100	>100	>100	>100
The non-rainy season	The average height/m	0.665	0.55	0.365	0.3	0.2	0.3
	Results	<0.9	<0.9	<0.9	<0.9	<0.9	<0.9
	Impact force/kPa	176.2	126.3	86.89	75.71	29.43	24.63
	Results	>100	>100	35 ∼ 100	35 ∼ 100	<35	<35

Data availability statement

Data is available on request from the authors.