地下采掘诱发斜坡失稳破坏机制研究——以武隆鸡尾山崩滑为例

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摘要对国内外地下采掘诱发山体崩滑案例与研究现状进行详细归纳，系统总结此类地质灾害发生的主要特点。为进一步加深对采动滑坡机制的认识，以重庆武隆鸡尾山崩滑灾害为例，采用基于连续介质的离散元方法，建立鸡尾山崩滑体大型三维数值模型，借助GPU高性能加速计算技术，再现滑坡体在地下采掘作用下的失稳破坏过程，研究地下采掘对坡体应力场和位移场的影响，分析崩滑体的形成机制与运动规律。研究结果表明：鸡尾山崩滑体的发生过程为“前缘关键块体外侧局部崩塌→后缘坡体整体滑动→岩溶带剪断突破失稳”，并从应力和变形的角度对这一失稳模式进行精细分析，认为地下采掘是导致鸡尾山崩滑发生的主要诱发因素。

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关键词 ：边坡工程, 滑坡灾害, 鸡尾山崩滑, 诱发机制, 地下采掘

Abstract：Landslide geohazards induced by underground mining at home and broad were summarized，and the current status of studies were analyzed. Common characteristics of these geological disasters were generalized. To reinforce the understanding of mechanism of undermining-induced landslides，taking Jiweishan Rockslide in Wulong for example，large-scale three-dimensional numerical model was built with the Continuum-based Discrete Element Method. The GPU technology that could accelerate the velocity of the circulations was used in the process of operation. Landslide failure process induced by undermining was modelled. The influence of rockslide stress field and displacement field caused by undermining were analyzed，and the formation mechanism and movement trend were investigated. The conclusions are as follow：the failure mechanism of Jiweishan Rockslide is part of the key block in front of the landslide collapsed，the sliding body at back of the landslide slided，and the karstificated belt was suddenly broken with shear rupture that had triggered the rockslide. Failure pattern was testified concretely with variation analysis of stress and deformation. This study shows that Jiweishan Rockslide was induced by underground mining.

Key words： slope engineering landslide hazard Jiweishan rockslide induced mechanism undermining

收稿日期: 2011-11-17

引用本文:

李腾飞1，2，李晓1，李守定1，赫建明1，马超锋3，4. 地下采掘诱发斜坡失稳破坏机制研究——以武隆鸡尾山崩滑为例[J]. 岩石力学与工程学报, 2012, 31(s2): 3803-3810.
Li Tengfei1，2，LI Xiao1，LI Shouding1，HE Jianming1，MA Chaofeng3，4. MECHANISM OF SLOPE FAILURE INDUCED BY UNDERMINING —A CASE STUDY OF JIWEISHAN ROCKSLIDE IN WULONG. , 2012, 31(s2): 3803-3810.

链接本文:

http://www.rockmech.org/CN/Y2012/V31/Is2/3803

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