22 2 2011 6 The Chinese Journal of Geological Hazard and Control Vol. 22 No. 2 Jun. 2011 1 1 1 2 1. 361005 2. 423037 1003-8035 2011 02-0108-07 TU457 A 0 10 ANSYS10. 0 1-9 2-3 Slide5. 0 9 1 2D-FLOW 8km 4 5 13a 215 10 4 m 3 150 10 4 m 3 Ⅳ 6 ANSYS 512. 5m 42m 1985 8 25 400mm / d - 7 2011-04-21 2011-04-23 8 1987 FLAC 3D E-mail lqsszjldsf@ 126. com
2 109 A 40m 110 10 4 m 3 150 10 4 t 100 10 4 t 20 q 10 4 t 30 10 4 t 2001 2. 1. 2 1 475. 80m 492m 16. 20m 1 1. 75 1 2 1 3 x k h ( sx x ) + y k h ( sy y ) + h k z ( sz z ) = 0 3 514m 38. 20m 124. 9 k sx k sy k sz x y z 10 4 m 3 84. 0 10 4 m 3 9 516m 12. 4 10 4 m 3 1. 3 1985 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 10 2. 1 h T t M 2. 1. 1 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
110 ZHONGGUO DIZHIZAIHAI YU FANGZHI XUEBAO 2011 ANSYS 2. 3 2. 2 ANSYS 0 1 ANSYS Fig. 1 Finite element model for seepage of the tailing pond 1 6435 6629 ANSYS PLANE55 2. 4 ANSYS 11 2 Fig. 2 The stratum in the tailing pond 4 1 2 2 1 ANSYS APDL Table 1 1 Mechanical parameters of the soil in the tailing pond kn / m 3 kn / m 3 kpa MPa m / s 1 2. 5 2. 6515 200 30 30 3. 0 10-7 2 1 2. 1 2. 1768 32 27 11. 5 1. 16 10-6 3 2 2. 09 2. 1216 54. 8 24. 3 8. 7 6. 92 10-7 4 1. 89 1. 9655 41. 4 21. 5 6. 8 2. 04 10-7 2. 5 H = 3m ANSYS 46. 06m 0. 178435 10-6 m 3 / s 3 4 ANSYS 5 0
2 111 Fig. 3 3 Total waterhead contour of the tailing pond 118. 367Pa 4. 2m Drucker-Prager 3. 1 6 0. 224 3. 2 7 8 1. 29MPa 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 3. 3 6435 6629 x y x C
112 ZHONGGUO DIZHIZAIHAI YU FANGZHI XUEBAO 2011 30m 4 8 10 Fig. 8 The 3rd principal stress 7 C { C = C 0 / F s = arctan tan 0 F s 5 F s C 0 0 10 Fig. 10 Key points 4. 1 x H 2 5. 902 4. 2 H 3 4. 3 2 3 x 9 H = 1 ~ Fig. 9 Potential Slip Surface of the Tailing Pond Based on Strength Reduction 11m 9 25m 30m
2 113 Table 2 2 x m X direction displacement of the key points under different water level condition m H m 1 2 3 4 5 6 7 11 0. 273 0. 036 0. 303 0. 340 0. 385 0. 369 0. 365 9 0. 274 0. 036 0. 302 0. 340 0. 383 0. 369 0. 364 7 0. 274 0. 036 0. 301 0. 338 0. 382 0. 368 0. 364 5 0. 275 0. 037 0. 300 0. 343 0. 380 0. 368 0. 364 3 0. 276 0. 038 0. 300 0. 338 0. 379 0. 341 0. 362 1 0. 277 0. 038 0. 300 0. 341 0. 378 0. 367 0. 363 Table 3 3 Pa The 3rd pincipal stresses of the key points under different water level condition Pa H m 1 2 3 4 5 6 7 11 155914 206802 77957 96945 60850 100326 65119 9 156530 210862 78596 96022 59226 99877 63451 7 157131 207848 79289 96732 58716 100453 73474 5 157699 218614 80098 96494 58789 99987 63385 3 158001 225132 81298 94865 57909 99678 63448 1 158240 226677 82830 95575 58051 100423 63009 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 2010 20 12 140-142. 2. 14 J. 2003 24 S 25-28. YIN Guangzhi WEI Zuoan WAN Ling. Numerical simulation analysis about seepage field of Longdu tail bay J. Rock and Soil Mechanics 2003 24 Supp 25-28. 3. J. 2010 33 3 72-75. 1 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 2010 33 3 72-75. 4. J. 2007 29 5 112-118. 3 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 2007 29 5 112-118. 5. ABAQUS J. 2009 2 74-77. JING Xiaofei DENG Tao TAN Qinwen. Stability 1. forecasting of tailings dam by ABAQUS finite element J. 2010 software J. Morden Mining 2009 2 74-77. 12 140-142. 6. -
114 ZHONGGUO DIZHIZAIHAI YU FANGZHI XUEBAO 2011 J. 2009 3 74-77. WANG Qiang LU Bingqiang WANG Shuiping et al. Finite element analysis on seepage and stress coupled field of tailing dam J. Morden Mining 2009. 3 74-77. 7. ZHANG Shi WANG Bin. Stability analysis of a reservoir J. 2008 119 - slope based on the method of FEM strength reduction J. 122. 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 2008 119-122. 8. 1544-1549. J. 2008 9 123-125. LI Gen WANG Laigui CHEN Lei et al. Numerical simulation of the seepage stability of a tailing reservoir J. Morden Mining 2008 9 123-125. 9. 14. J. 2009 30 3 840-844. WANG Feiyue Yang Kaiteng Xu Zhisheng et al. Stability analysis of tailings dam based on saturation line matrix J. Rock and Soil Mechanics 2009 30 3 840-844. 10. Science&Technology Natural Science Edition 2007 22 D. 2010. YANG Genchun. Numerical simulation of seepage on small earth-rock dam and slope stability analysis D. Chengdu Xihua University 2010. 11. ANSYS D. QI Qinglan ZHANG Liting GU Fan et al. the factors 2006. 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 2006. 12. FEM J. 2009 2 1 17-21. 2009 2 1 17-21. 13. J. 2006 25 8 LIU Mingwei ZHENG Yingren determination methods of multi-slip surfaces landslide based on strength reduction fem J. Chinese Journal of Rock Mechanics and Engineering 2006 25 8 1544-1549. J. 2007 22 4 23-25. 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 4 23-25. 15. J. 2009 12 35-37. 2009 12 35-37. 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 361005 China 2. Hunan Shizhu yuan Nonferrous Metal Co. LTD Chenzhou Hunan 423037 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