基于霍克-布朗准则的巷道围岩塑性区估计

 为了研究巷道开挖后巷道围岩的塑性区分布规律，首先分析巷道围岩的应力分布特征，在计算出围岩应力的基础上，依据霍克—布朗强度准则推导出圆形巷道围岩的弹塑性分界限。本文通过理论计算得出在不同侧压力、不同地应力、不同m值、不同s值情况下巷道围岩的塑性区，并通过数值模拟进行对比，分析得出巷道塑性区的演化规律，对实际工程有一定的指导作用。

Estimation on Plastic Zone of Surrounding rock in Mine Roadway Base on Hock-Brown Criterion

In order to study the plastic zone distribution law of the surrounding rocks along the mine roadway after the mine roadway excavated,the stress distribution features of the surrounding rocks along the mine roadway were firstly analyzed.Base on the calculation on the stresses of the surrounding rocks,according to the Hock-Brown strength criterion,the plastic boundary limit of the surrounding rocks in the circular mine roadway was derived.The plastic zone in the surrounding rock of the mine roadway under the conditions of different side pressure,different stress,different m value and different s value was obtained with the theoretical calculation.With the comparison on the numerical simulations,the evolution law of the plastic zone in the mine roadway was analyzed and obtained.The study had a certain guidance role to the actual projects.