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南天山大龙池堰塞体形成演化过程分析

高旭

高旭. 南天山大龙池堰塞体形成演化过程分析[J]. 地质科技通报, 2024, 43(1): 229-240. doi: 10.19509/j.cnki.dzkq.tb20230322
引用本文: 高旭. 南天山大龙池堰塞体形成演化过程分析[J]. 地质科技通报, 2024, 43(1): 229-240. doi: 10.19509/j.cnki.dzkq.tb20230322
GAO Xu. Analysis of the formation and evolution process of the Dalongchi landslide dam in the South Tianshan Mountains[J]. Bulletin of Geological Science and Technology, 2024, 43(1): 229-240. doi: 10.19509/j.cnki.dzkq.tb20230322
Citation: GAO Xu. Analysis of the formation and evolution process of the Dalongchi landslide dam in the South Tianshan Mountains[J]. Bulletin of Geological Science and Technology, 2024, 43(1): 229-240. doi: 10.19509/j.cnki.dzkq.tb20230322

南天山大龙池堰塞体形成演化过程分析

doi: 10.19509/j.cnki.dzkq.tb20230322
基金项目: 

国家重点研发计划 2017YFA063101

详细信息
    通讯作者:

    高旭, E-mail: 1143501472@qq.com

  • 中图分类号: P642.22

Analysis of the formation and evolution process of the Dalongchi landslide dam in the South Tianshan Mountains

More Information
  • 摘要:

    堰塞体是高山峡谷区开展工程建设重点关注的地质体,本研究以南天山大龙池堰塞体为研究对象,探索南天山高山峡谷地区堰塞体的成因及演化过程。基于大龙池区域卫星遥感影像、区域地质资料,依托现场调查和地质钻探等方法,结合理论计算与有限元-离散元模拟技术,对南天山高山峡谷地区堰塞体的成因及演化过程进行了系统研究。结果表明:(1)大龙池堰塞体北侧山体陡峭,山体表面可见多处滑坡擦痕和刻槽,堰塞体堆积结构具有明显的反粒序和拼图结构特征,提出了大龙池堰塞体为高速远程古滑坡堆积的成因机理;(2)通过复原大龙池北面山体滑坡原始坡面,对其运动学特征进行理论计算与数值仿真模拟,结果表明大龙池北侧山体曾发生高速远程滑坡;(3)大龙池堰塞体的形成演化过程可分为古滑坡孕育、古滑坡堵河形成堰塞体以及堰塞体溃决3个阶段。研究结论可为南天山地区类似堰塞体的成因分析提供参考。

     

  • 图 1  研究区遥感影像图

    Figure 1.  Remote sensing image of the study area

    图 2  大龙池堰塞体区域地质图

    Figure 2.  Geological map of the Dalongchi landslide dam

    图 3  大龙池堰塞体工程地质图和A-A′剖面图

    Figure 3.  Engineering geological map of the Dalongchi landslide dam and A-A′ profile

    图 4  堆积结构特征

    Figure 4.  Characteristics of the accumulation structure

    图 5  钻孔DXLCZ-5(a, b)和DXLCZ-6(c, d)岩心照片

    Figure 5.  DXLCZ-5(a, b) and DXLCZ-6(c, d) core photos

    图 6  北侧岩壁表面构造特征

    Figure 6.  Surface structural characteristics of the northern rock wall

    图 7  大龙池堰塞体形成演化过程

    Figure 7.  Formation and evolution process of the Dalongchi landslide dam

    图 8  大龙池右岸斜坡岩体结构面赤平投影图

    J1. 张拉节理;J2. 剪切节理

    Figure 8.  Stereographic projection of the discontinities on the right bank of the Dalongnci rock slope

    图 9  基于最大运动距离(a)和质心运动距离(b)的滑体速度变化曲线

    Figure 9.  Speed variation curve of the sliding mass based on the maximum movement distanc (a) and centroid motion distance (b)

    图 10  不同时间滑坡运动状态

    Figure 10.  Landslide motion state at different times

    图 11  不同监测颗粒速度变化图

    Figure 11.  Different monitoring particle velocity changes

    图 12  不同监测颗粒位移变化图

    Figure 12.  Different monitoring particle displacement changes

    表  1  模型颗粒微观参数

    Table  1.   Microscopic parameters of model particles

    球最小半径Rmin/m 球半径比Rmax/Rmin 球-球接触模量Ec/GPa 球刚度比kn/ks 平行黏结半径乘子λ 平行黏结模量Ec/GPa 平行黏结刚度比kn/ks 球摩擦因素f
    4 2 34 1 1 34 1.5 0.5
    下载: 导出CSV
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  • 收稿日期:  2023-06-07
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