Numerical Simulation Analysis of Reservoir Bank Fractured Rock-Slope Deformation and Failure Processes
Publication: International Journal of Geomechanics
Volume 16, Issue 2
Abstract:
The fluctuations of reservoir water levels significantly change the hydrogeological conditions of reservoir banks and thus affect the steady state of the bank slope. Reservoir landslide stability is governed by the complex interactions between the rock and the water (both reservoir and pore water). This paper establishes the constitutive coupled model of seepage and stress field for the E20 bank slope in the Haizhou Open Pit Coal Mine hydropower station’s lower reservoir. Using the geotechnical engineering three-dimensional fast Lagrangian analysis of continua (FLAC-3D 4.0) program as a computational analysis tool, the E20 bank slope deformation mechanism was analyzed. The simulation model, calculated by using the Boit consolidation and pore-water continuity principles, was built using FEMs. The numerical simulation results showed that cyclical fluctuations and speeds of the reservoir’s water level affect its bank slope stability. When the water level drops at a speed of 12 m/day, the simulation’s calculated safety factor value is 0.99, but when the water level rises at a speed of 12 m/day, the calculated safety factor value is 1.03. The results demonstrated that the rapid drop of the water level had a greater impact on the reservoir bank slope stability than the rapid rise of the water level under the same conditions.
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Acknowledgments
This research is supported by grants from the National Natural Science Foundation of China (No. 2011-KY-5) and the 12-5 major project of Xinjiang (No. 201130103-3). The authors are grateful to the anonymous reviewers for constructive comments that improved the quality of the work.
References
Bai, M., Meng, M., and Elsworth, D. (1999). “Analysis of stress-dependent permeability in non-orthogonal flow and deformation field.” Rock Mech. Rock Eng., 32(3), 195–219.
Berilgen, M. M. (2007). “Investigation of stability of slopes under drawdown conditions.” Comput. Geotech., 34(2), 81–91.
Biot, M. A. (1941). “General theory of three-dimension-consolidation.” J. Appl. Phys., 12(2), 155–164.
Biot, M. A. (1955). “Theory of elasticity and consolidation for a porous anisotropic solid.” J. Appl. Phys., 26(2), 182–185.
Biot, M. A. (1956). “Theory of deformation of porous viscoelastic anisotropic solid.” J. Appl. Phys., 27(5), 459–467.
Chang, S. H., Lee, C. I., and Jeon, S. (2002). “Measurement of rock fracture toughness under modes 1 and 2 and mixed mode conditions by using disc-type specimens.” Eng. Geol., 66(1–2), 79–97.
Cho, S. E., and Lee, S. R. (2001). “Instability of unsaturated soil slopes due to inflation.” Comput. Geotech., 28(3), 185–208.
Duncan, J. M., Wright, S. G., and Wong, K. S. (1990). “Slope stability during rapid draw-down.” Proc., H. Bolton Seed Memorial Symp., BiTech Publishers, Vancouver, BC, Canada, 253–272.
Esaki, T., Du, S., Mitani, Y., Ikusada, K., and Jing, L. (1999). “Development of shear-flow test apparatus and determination of coupled properties for a single rock joint.” Int. J. Rock Mech. Min. Sci, 36(5), 641–650.
FLAC-3D 4.0 [Computer software]. Minneapolis, Itasca Consulting Group.
Gasmo, J. M., Rahardjo, H., and Leong, E. C. (2000). “Infiltration effects on stability of a residual soil slope.” Comput. Geotech., 26(2), 145–165.
He, F., Wang, L. G., and Wang, Z. W. (2006). “Statistics analysis of Haizhou mine landslide calamity and information data base constructing.” J. Geolog. Hazards Envrion. Preserv., 17(2), 61–63 (in Chinese).
Jiang, X. L., et al. (2011). “FLAC3D analysis of interaction between goaf and open-cut mining slope with 3D geological model using SURPAC.” Rock Soil Mech., 32(4), 1234–1240.
Jin, D. L., and Wang, G. F. (1988). Tangyanguang landslide in Zhaxi Reservoir, Hunan province, China. Typical landslides occurred in China, Science Press, Beijing, 301–307 (in Chinese).
King, M. S., Chaudhry, N. A., and Shakeel, A. (1995). “Experimental ultrasonic velocities and permeability for sandstones with aligned cracks.” Int. J. Rock Mech. Min. Sci. Geomech. Abstr., 32(2), 155–163.
Lane, P. A., and Griffiths, D. V. (2000). “Assessment of stability of slopes under drawdown conditions.” J. Geotech. Geoenviron. Eng., 443–450.
Lee, H. S., and Cho, T. F. (2002). “Hydraulics characteristics of rough fractures in linear flow under normal and shear load.” Rock Mech. Rock Eng., 35(4), 299–318.
Li, J., Chen, J., and Geng, B. J. (2005). “Evolution trend of environmental and geological calamities in Haizhou opencast mine and countermeasures.” J. Liaoning Technical Univ., 24(4), 520–523 (in Chinese).
Liu, J., Elsworth, D., Brady, B. H., and Muhlhaus, H. B. (2000). “Strain-dependent fluid flow defined through rock mass classification schemes.” Rock Mech. Rock Eng., 33(2), 75–92.
Liu, X. T., and Zhang, Z. H. (2010). “Stability of bank slope under reservoir water drawdown.” Proc., 2010 Int. Symp. on Multi-field Coupling Theory of Rock and Soil Media and Its Applications, Chengdu City, China, J. Liu, H. Zhang, and R. Zhao, eds., Orient Academic Forum, Marrickville, NSW, Canada, 533–538.
Ma, D. D. (2006). “The present situation and technology of ecological restoration of mining wasteland in Fuxin.” Master’s thesis, Northeast Normal Univ., Chang Chun, China (in Chinese).
Maihemuti, B. (2013). “Research on the damage deformation rock slope failure mechanism under the hydrodynamic conditions and its application.” Ph.D. thesis, Xinjiang Agricultural Univ., Urumqi, China.
Makurat, A., Barton, N., Rad, S., and Bandis, S. (1990). “Joint conductivity variation due to normal and shear deformation.” Proc., Int. Symp. on Rock Joints, Leon, Norway, N. Barton and O. Stephansson, eds., A. A. Balkema, Rotterdam, Netherlands, 535–540.
Muller, L. (1964). “The rock slide in the Vajont Valley.” Rock Mech. Eng. Geol., 2(1), 148–212.
Nakamura, H., and Wang, G. X. (1990). “Study on landslide in reservoir area.” Bull. Soil Water Conserv., 10(1), 53–64 (in Chinese).
Rutqvist, J., and Stephansson, O. (2003). “The role of hydromechanical coupling in fractured rock engineering.” Hydrogeol. J., 11(1), 7–40
Serafim, J. L. (1987). “Malpasset dam discussion-remembrances of failure of dams.” Eng. Geol., 24(1–4), 355–366.
Wang, H. L., and He, M. (2012). “Arch dam and skewback and dam abutment rock mass deformation under seepage field and stress field coupling.” Procedia Environ. Sci., 12(A), 561–567.
Wittke, W., and Leonhards, G. A. (1987). “Modified hypothesis for failure of Malpasset dams.” Eng. Geol., 24(1–4), 367–394.
Zhang, Y. H. (2009). “The landslides research of Haizhou open-pit mine.” Master’s thesis, Liaoning Normal Univ., Da Lian, China (in Chinese).
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Published In
International Journal of Geomechanics
Volume 16 • Issue 2 • April 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Nov 14, 2014
Accepted: Apr 7, 2015
Published online: Sep 23, 2015
Discussion open until: Feb 23, 2016
Published in print: Apr 1, 2016
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