侧压力对巷道塑性区分布规律影响的研究

Research on Plastic Zone Distribution Law of Surrounding Mine Roadway along Mine Roadway with Affection of Side Pressure

为了研究不同侧压力对巷道围岩塑性区分布规律的影响,首先基于巷道围岩的应力分布特征计算出围岩应力,然后以摩尔-库仑强度准则推导出巷道塑性区的边界方程。通过理论计算出了不同侧压力下巷道围岩塑性区的变化规律,并以数值模拟进行了验证,得出了不同侧压力系数下圆形巷道塑性区的分布规律,此分布规律与现场实测一致。

In order to study the plastic zone distribution law of the surrounding mine roadway along the mine roadway with the affection of side pressure, the stress distribution of the surrounding rocks along the mine roadway was analyzed firstly. Based on the calculation on the stress of the surrounding rocks, according to Mohr-Coulomb theory, the plastic boundary limit of the surrounding rocks in the mine roadway was deduced. Through theoretical, calculated pressure variation at different sides of the plastic zone of surrounding rock, and numerical simulation was validated distribution obtained under different lateral pressure coefficient circular roadway plastic zone. At the same time, the distribution is consistent with the measured.