基于广义Hoek-Brown屈服准则的圆形巷道围岩弹塑性力学分析
发布时间：2018-09-12 06:45
【摘要】：考虑不同巷道埋深对支护压力的影响,采用广义Hoek-Brown屈服准则对圆形巷道围岩进行弹塑性力学分析。利用在弹塑交界处应力连续的条件及巷道周边的应力边界条件,得到了塑性区的应力和巷道的支护压力与原岩应力之间的解析式。研究表明:塑性区的应力和巷道的支护压力不仅与本身的力学特性有关,而且还与原岩应力有关;并针对质量较差的软岩,分析了在不同支护压力条件下巷道所能承受的最大原岩应力及其所对应的最大的埋深。分析结果表明:支护压力与原岩应力及其所对应的巷道埋深存在明显的线性关系。
[Abstract]:Considering the influence of different buried depth of roadway on supporting pressure, the elastoplastic mechanics analysis of circular roadway surrounding rock is carried out by using generalized Hoek-Brown yield criterion. By using the stress continuity condition at the elastic-plastic junction and the stress boundary condition around the roadway, the analytical formula between the stress in the plastic zone and the support pressure of the roadway and the stress in the original rock is obtained. The results show that the stress of plastic zone and the supporting pressure of roadway are not only related to the mechanical properties of the rock itself, but also to the stress of the original rock, and to the soft rock with poor quality. The maximum original rock stress and the corresponding maximum buried depth of roadway under different supporting pressure are analyzed. The results show that there is an obvious linear relationship between the support pressure and the stress of the original rock and the corresponding buried depth of the roadway.
【作者单位】： 安徽理工大学力学与光电物理学院;安徽理工大学土木建筑学院;
【分类号】：TD322
本文编号：2238219
[Abstract]:Considering the influence of different buried depth of roadway on supporting pressure, the elastoplastic mechanics analysis of circular roadway surrounding rock is carried out by using generalized Hoek-Brown yield criterion. By using the stress continuity condition at the elastic-plastic junction and the stress boundary condition around the roadway, the analytical formula between the stress in the plastic zone and the support pressure of the roadway and the stress in the original rock is obtained. The results show that the stress of plastic zone and the supporting pressure of roadway are not only related to the mechanical properties of the rock itself, but also to the stress of the original rock, and to the soft rock with poor quality. The maximum original rock stress and the corresponding maximum buried depth of roadway under different supporting pressure are analyzed. The results show that there is an obvious linear relationship between the support pressure and the stress of the original rock and the corresponding buried depth of the roadway.
【作者单位】： 安徽理工大学力学与光电物理学院;安徽理工大学土木建筑学院;
【分类号】：TD322
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