软岩支护力学作用原理的新认识

The New Understanding of Mechanical Principles of Effect on Soft Rock Support

本文运用损伤力学中考虑蠕变损伤的力学模型对地下巷道围岩的受力状态进行了分析。结果表明:在考虑围岩强度随时间而变化的因素时,传统的二次支护的力学作用原理需要重新认识,过去的一些软岩支护方法需要改进。

In this paper, the stress condition in the surrounding rock of underground tunnel is analysed with the creep damage modelling of damage mechanics. The result shows that the afresh understanding of traditional mechanical principles of effect on secondary support methods are needed if the factor that the strength of surrouding rock varies with time is considered.