煤炭工程 ›› 2019, Vol. 51 ›› Issue (12): 160-166.doi: 10.11799/ce201912033

• 研究探讨 • 上一篇    

基于FLAC3D的贵州马达岭煤炭采动型滑坡机理研究

潘网生,傅良同,李鑫,张晓周,韩国栋   

  1. 1. 黔南民族师范学院
    2.
  • 收稿日期:2019-05-07 修回日期:2019-07-25 出版日期:2019-12-20 发布日期:2020-05-11
  • 通讯作者: 潘网生 E-mail:450392404@qq.com

Research on Mechanism of Madaling Landslide by Coal Mining in Guizhou Province Based on FLAC3D

  • Received:2019-05-07 Revised:2019-07-25 Online:2019-12-20 Published:2020-05-11

摘要: 以贵州省都匀市马达岭滑坡为例,基于FLAC3D拉格朗日快速差分算法模拟煤层开挖,揭示边坡变形过程及其滑动机理。研究结果表明:喀斯特地区煤层开采对边坡稳定性有着不可忽视的影响,煤层开挖进深控制边坡垂向优势结构面的空间分布,煤层开挖作业面宽度控制垂向优势结构面的扩展程度,后者对边坡稳定性影响远大于前者|马达岭滑坡的形成与发育可以划分为两个阶段|不利的岩层产状(NW282°∠18°)及大量节理裂隙水的存在,目前可能正在孕育一个规模更大的滑坡地质灾害。

关键词: 采动型滑坡, 机理, 喀斯特, FLAC3D, 马达岭

Abstract: Taking Madaling landslide in Duyun Dity, Guizhou Province as an example, this paper simulated the excavation of coal bed based on Lagrangian fast difference algorithm of FLAC3D and revealed the deformation process and sliding mechanism of the slope. The results showed that (1) Coal bed excavation in Karst area has a significant impact on the stability of the slope. The excavation depth of coal bed controls the spatial distribution of vertical preferred structural plane of the slope body, the excavation width of coal bed controls the extension of vertical preferred structural plane, and the influence of the latter on the stability of the slope is much greater than that of the former;(2) The development process of Madaling landslide can be divided into two stages; (3)Due to unfavorable occurrence of stratum (NW282 ° < 18 °) and the existence of a large number of joint fissure water, a larger landslide disasters is being born.

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