Slide D-FLOW 8km. 13a. 400mm / d

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1 The Chinese Journal of Geological Hazard and Control Vol. 22 No. 2 Jun TU457 A 0 10 ANSYS Slide D-FLOW 8km a m m 3 Ⅳ 6 ANSYS m 42m mm / d FLAC 3D lqsszjldsf@ 126. com

2 2 109 A 40m m t t 20 q 10 4 t t m 492m m x k h ( sx x ) + y k h ( sy y ) + h k z ( sz z ) = m m k sx k sy k sz x y z 10 4 m m m m x k T rx x + y k T ry y + T k z rz = 0 4 z k rx k ry k rz x y z h t = t0 = h x y x T t = t0 = T x y x 2 h Mes1 = φ s h T t M φ s φ r M S 1 v = Q s A = - k s dh dl = K sj Δh Q s = Ak s dl Q s A h k s L v J Q r Q r dt = Ak r dn q = Q r A - k dt r dn 1 2 dt / dn k r ( ) ( ) T Mes1 ( ) = φ r h k sn = v n s2 Mes2 T k rn = q n s2 Mes2 k sn k rn h / n T / n v s2 M t q s2 M t M S 2 v s2 = 0 q s2 = 0

3 110 ZHONGGUO DIZHIZAIHAI YU FANGZHI XUEBAO 2011 ANSYS ANSYS 0 1 ANSYS Fig. 1 Finite element model for seepage of the tailing pond ANSYS PLANE ANSYS 11 2 Fig. 2 The stratum in the tailing pond ANSYS APDL Table 1 1 Mechanical parameters of the soil in the tailing pond kn / m 3 kn / m 3 kpa MPa m / s H = 3m ANSYS m m 3 / s 3 4 ANSYS 5 0

4 2 111 Fig. 3 3 Total waterhead contour of the tailing pond Pa 4. 2m Drucker-Prager MPa Fig. 4 4 Seepage direction of the tailing pond Fig. 6 6 Equivalent plastic strain before strength reduction Fig. 5 5 Pressure Waterhead Contour of the Tailing Pond 3 7 Fig. 7 The 1st principal stress x y x C

5 112 ZHONGGUO DIZHIZAIHAI YU FANGZHI XUEBAO m Fig. 8 The 3rd principal stress 7 C { C = C 0 / F s = arctan tan 0 F s 5 F s C Fig. 10 Key points 4. 1 x H H x 9 H = 1 ~ Fig. 9 Potential Slip Surface of the Tailing Pond Based on Strength Reduction 11m 9 25m 30m

6 2 113 Table 2 2 x m X direction displacement of the key points under different water level condition m H m Table 3 3 Pa The 3rd pincipal stresses of the key points under different water level condition Pa H m HU Shaohua WANG Tao YANG Fan et al. Calculating 5 and analyzing the seepage and stability of a tailing pond J. Sci-Tech Information Development & Economy J S YIN Guangzhi WEI Zuoan WAN Ling. Numerical simulation analysis about seepage field of Longdu tail bay J. Rock and Soil Mechanics Supp J YIN Guangzhi LI Yuan WEI Zuoan et al. Regularity of the saturation lines change and stability analysis of 15 tailings dam in the condition of flood J. Journal of 2 Chongqing University J CAO Linwei PENG Xianghe LI De et al. Analysis of the static stability of tailings dam under coupled deformation 4 and seepage fields J. Journal of Chongqing Jianzhu University ABAQUS J JING Xiaofei DENG Tao TAN Qinwen. Stability 1. forecasting of tailings dam by ABAQUS finite element J software J. Morden Mining

7 114 ZHONGGUO DIZHIZAIHAI YU FANGZHI XUEBAO 2011 J WANG Qiang LU Bingqiang WANG Shuiping et al. Finite element analysis on seepage and stress coupled field of tailing dam J. Morden Mining ZHANG Shi WANG Bin. Stability analysis of a reservoir J slope based on the method of FEM strength reduction J Journal of Hubei Water Resources Technical college ZHANG Liting ZHOU Guobin GU Fang et al. Influence of the rapidly changing reservoir level on the stability of tailing dam J. Metal Mine J LI Gen WANG Laigui CHEN Lei et al. Numerical simulation of the seepage stability of a tailing reservoir J. Morden Mining J WANG Feiyue Yang Kaiteng Xu Zhisheng et al. Stability analysis of tailings dam based on saturation line matrix J. Rock and Soil Mechanics Science&Technology Natural Science Edition D YANG Genchun. Numerical simulation of seepage on small earth-rock dam and slope stability analysis D. Chengdu Xihua University ANSYS D. QI Qinglan ZHANG Liting GU Fan et al. the factors influencing the seepage field of tailing dam and the HE Xiaoming. Research on analyzing dam seepage based measures lowering the seepage line J. Metal Mine on ANSYS D. Xi an Xi an University of Technology FEM J J LIU Mingwei ZHENG Yingren determination methods of multi-slip surfaces landslide based on strength reduction fem J. Chinese Journal of Rock Mechanics and Engineering J CHEN Jinduan LI Shiwu NING Libo et al. Analysis of finite element method by simulation on one tailing dam saturation line J. Journal of Hunan University of J Analysis of seepage and stability by FEM for Yejiwei Tailing Pond in Shizhuyuan Hunan Province LI Qing-shi 1 LI Shu-lin 1 ZHOU Shu-wei 1 CHEN Ji-jing 2 1. Architectural and Civil Engineering School of Xiamen University Xiamen China 2. Hunan Shizhu yuan Nonferrous Metal Co. LTD Chenzhou Hunan China Abstract Based on Yejiwei Tailing Pond in Shizhuyuan the seepage and stability are analyzed using the finite element method FEM. Using finite element of heat flow and groundwater seepage to achieve environmental similarity the seepage field of the tailing pond was simulated and analyzed its saturation line and waterhead distribution were defined. The finite element model was set up for static analysis by using different volume weights for the soil up and down the saturation line with considering of the effective stress parameters and the static stability of the tailing pond was analyzed from stress slip surface and plastic zone. At the same time the effect to the stability of the tailing pond caused by the changing water level was discussed. The results show that the stability of this tailing pond is well under seepage condition and the changing water level do little effect on its stability. Key words tailing pond seep saturation line stability FEM

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