4结论

1)陡崖逆向台阶状地貌形迹是危岩阶段性演化的宏观表象，通过对陡崖地貌形迹的分析可以反演危岩发育规律及斜坡动力演化过程。

2)陡崖上危岩从坡脚向坡顶及从临空面向山体内部的发育过程即为危岩链式规律，包括从坡脚向坡顶逐渐崩落的多个微观链和从临空面向山体内部逐渐后退的宏观链。陡崖坡脚岩腔的形成过程及其卸荷效应是三峡库区危岩链式规律的孕育源。

3)危岩链式规律可分为简单模式和复合嵌套模式，前者仅有一个宏观链，后者包括两个以上同时发育的宏观链，三峡库区危岩链式规律同时发育的宏观链2~3个。

4)危岩链式规律揭示了三峡库区内危岩演化的内在规律，是支撑、支撑-锚固联合等危岩防治技术及万州、云阳等长江两岸大量崩积物形成机制的理论依据。进一步研究中，应重点研究危岩链式演化的时间进程及力学演绎，据此评判现有陡崖所处的演化阶段及其整体和局部安全寿命。

参考文献

[1] 陈洪凯,唐红梅,叶四桥.危岩主控结构面损伤模型研究[J].应用数学和力学,2006,27(7):845-851

[2] Richard J, C., Stanley A. S., and David E.S. Geomorphology [M]. Cambridge, the University Press of Cambridge, 1984:255-275

[3] B.L.Jones, S.S.W.Chinn, and J.C.Brice. Ololele rock avalanche, island of Kauai, Hawii [J]. Geology, 1984,12(4): 209-211

[4] Hungr O., Evans S.G., and Hazzard J. Magnitude and frequency of rock falls and rock slides along the main transportation corridors of southwestern British Columbia [J]. Can. Geotech. J., 1999, 36(2):224-238

[5] Hungr O., and Evans S. G. The occurrence and classification of massive rock slope failure [J]. Felsbau, 2004, 22(2): 16-23

[6] Reginald L. H., Manfred R.S. Structural and lithological controls on large Quaternary rock avalanche (sturzstroms) in arid northwestern Argentina [J]. GSA Bulletin, 1999, 111(6):934-948

[7] Bertran P. The rock-avalanche of February 1995 at Claix ( French Alps) [J].Geomorphology, 2003, 54(3):339-346

[8] Pirulli M. Numerical analysis of three potential rock avalanches in the Alps [J]. Felsbau, 2004, 22(2): 32-38

[9] Max Suter. A neotectonic-geomorphologic investigation of the prehistoric rock avalanche damming Laguna de Metztitlan (Hidalgo State, east-central mexico) [J]. Revista Mexicana de Ciencias Geologicas, 2004,21(3):397-411

[10] Braathen A., Blikra L.H., and S.S.& Karlsen. Rock-slope failure in Norway: type, geometry, deformation mechanisms and stability [J]. Norweigian Journal of Geology, 2004, 84: 67-88

[11] Dussauge C., Grasso J.R., Helmstetter A.Statistical analysis of rockfall volume distributions: Implications for rockfall dynamics [J]. Journal of Geophysical Research Solid Earth, 2001,108(B6):ETG2-1

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