Study on Failure Law of Deformation and Instability of Surrounding Rock in Deep Soft Rock Roadway

2021 7th Annual International Conference on Network and Information Systems for Computers (ICNISC) Pub Date : 2021-07-01 DOI:10.1109/ICNISC54316.2021.00130

Lei Shao, Heyong Yuan, Xinfeng Wang, Wengang Liu, Qiao Zhang

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Abstract

Aiming at the problem of large deformation and soft fracture of soft rock in deep roadway, through theoretical analysis of deformation and failure characteristics of surrounding rock of deep roadway, the space-time evolution law of deformation and failure of surrounding rock of deep soft rock roadway is obtained by FLAC3D software simulation. The results show that: The deformation of surrounding rock in deep soft rock roadway is characterized by roof subsidence, two sides moving inward and floor bulging. Under the action of high stress, the deformation of surrounding rock of soft rock roadway has a certain timeliness. The deformation and failure of surrounding rock of roadway is a changing process with time. The damage degree of roof, floor and two sides of roadway increases with time, and finally tends to a stable state. The deformation presents a distribution law that the de-formation of floor is larger than that of roof and convergence of two sides.

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深部软岩巷道围岩变形失稳破坏规律研究

针对深部巷道软岩大变形和软破裂问题，通过对深部巷道围岩变形破坏特征的理论分析，利用FLAC3D软件模拟得到深部软岩巷道围岩变形破坏的时空演化规律。结果表明:深部软岩巷道围岩变形表现为顶板沉陷、两边向内移动和底板胀形;在高应力作用下，软岩巷道围岩变形具有一定的时效性。巷道围岩的变形破坏是一个随时间变化的过程。巷道顶板、底板和巷道两侧的破坏程度随着时间的增加而增加，并最终趋于稳定。变形呈现出底板变形大于顶板变形且两侧收敛的分布规律。

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2021 7th Annual International Conference on Network and Information Systems for Computers (ICNISC)

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