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近水平厚层高陡斜坡崩塌机制研究

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冯振, 李滨, 贺凯. 近水平厚层高陡斜坡崩塌机制研究[J]. 地质力学学报, 2014, 20(2): 123-131.
引用本文: 冯振, 李滨, 贺凯. 近水平厚层高陡斜坡崩塌机制研究[J]. 地质力学学报, 2014, 20(2): 123-131.
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FENG Zhen, LI Bin, HE Kai. ROCK COLLAPSE MECHANISM ON HIGH-STEEP SLOPE FAILURE IN SUB-HORIZONTAL THICK-BEDDED MOUNTAINS[J]. Journal of Geomechanics, 2014, 20(2): 123-131.
Citation: FENG Zhen, LI Bin, HE Kai. ROCK COLLAPSE MECHANISM ON HIGH-STEEP SLOPE FAILURE IN SUB-HORIZONTAL THICK-BEDDED MOUNTAINS[J]. Journal of Geomechanics, 2014, 20(2): 123-131.
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近水平厚层高陡斜坡崩塌机制研究

  • 1.

    中国地质科学院地质力学研究所, 北京 100081

  • 2.

    国土资源部新构造运动与地质灾害重点实验室, 北京 100081

  • 3.

    长安大学地质工程与测绘学院, 西安 710054

  • 基金项目:
    国家自然科学基金项目（41302246）；中国地质科学院地质力学研究所基本科研业务费项目（DZLXJK201307）；国家科技支撑课题（2012BAK10B01）；地质调查项目（1212011220140）
详细信息
    作者简介: 冯振（1985-），男，博士，助理研究员，主要从事地质灾害等方面的研究工作。E-mail：fengzhencgs@126.com

  • 中图分类号: P642.21

ROCK COLLAPSE MECHANISM ON HIGH-STEEP SLOPE FAILURE IN SUB-HORIZONTAL THICK-BEDDED MOUNTAINS

  • 1.

    Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China

  • 2.

    Key laboratory of Neotectonic and Goehazard, Ministry of Land and Resources, Beijing 100081, China

  • 3.

    School of Geology Engineering and Geomatics, Chang'an University, Xi'an 710054, China

    摘要

  • 近水平厚层高陡斜坡岩层倾角小于10°，具有软硬相间或上硬下软的结构，常形成高陡斜坡或陡崖地形，主要以大型崩塌的形式发生破坏。在梳理国内外文献的基础上，从岩体破坏机制出发，对近水平厚层高陡斜坡崩塌的形成过程、破坏机制、失稳模式进行分析，总结归纳了6种地质力学模型，包括滑移-拉裂、塑流-拉裂、倾倒-拉裂、剪切-错断、剪切-滑移、劈裂-溃屈，并提出了相应的野外识别特征。

    Sub-horizontal thick bedding slope shows a gentle dip of approximately 0~10°and strata structure of hard on soft, or hard interbedded with soft. It forms a high and steep terrain and is prone to rock collapse. Reviewing a lot of references, failure process and initiation mechanism, as well as failure modes of high-steep slope in sub-horizontal thick bedding mountains are analyzed in terms of rock mass failure mechanism. Six geomechanic models are summarized such as slipe-tensile, creep-tensile, slipe-shear, shear-rupture, shear-slipe and split-bulk. Corresponding to the reconginition features of geological structure are also presented.

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  • 图 1  滑移-拉裂式崩塌模式（据文献[8]修改）

    Figure 1. 

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    图 2  近水平厚层高陡山体塑流-拉裂破坏的地貌学演化过程[20]

    Figure 2. 

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    图 3  望霞危岩的旋转剪切

    Figure 3. 

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    图 4  易于发生倾倒-拉裂的红砂岩塔状危岩

    Figure 4. 

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    图 5  Katoomba崩塌现场

    Figure 5. 

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    图 6  Katoomba剪切-错断式崩塌剖面图[22]

    Figure 6. 

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    图 7  近水平厚层高陡斜坡平面滑移破坏[28]

    Figure 7. 

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    图 8  滑移-剪切破坏示意图[27]

    Figure 8. 

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    图 9  甑子岩危岩正视图（镜像45°）

    Figure 9. 

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    图 10  甑子岩危岩崩塌剖面图

    Figure 10. 

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收稿日期:  2014-02-12
刊出日期:  2014-06-25

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