地震作用下巷道破坏模拟和实验对比分析

Comparative Analysis of Simulation and Experiment of Roadway Damage under the Effect of Earthquake

基于工程结构波动及结构动力学理论,建立煤矿采空区岩层的动力学方程,将小型室内相似振动台实验结合ANSYS有限元数值计算,对比分析巷道的地震动力破坏特征。研究发现:在地震作用下,在拱形和圆形巷道的几何中心水平线正负45°区域以及拱形巷道底角处的剪应力、主应力最显著,而在拱形巷道的两底角及顶板处易产生破坏,圆形巷道的顶板产生了裂纹,圆形巷道的最大主应力及剪应力分布偏向右侧;拱形巷道最大主应力偏向右侧,剪应力呈对称分布,拱形巷道的两底角及顶板易产生破坏。在巷道的抗震设计中,可对巷道受力薄弱处加强加固和采取抗震措施,提高巷道的抗震性能。

In order to study the dynamic instability mechanism of roadway structure under earthquake loading Engineering structure fluctuation and structure based on the kinetic theory,the establishment of coal mine goaf rock dynamics equation,the small interior similarity calculation of ANSYS finite element numerical shaking table experiment combined with comparative analysis of seismic dynamic,dynamic characteristics of roadway Study results show,in the arched and circular tunnel geometric center horizontal line of±45°regions and the arch tunnel at the bottom corner of the shear stress,principal stress is the most significant,while in the two corners and roof arch roadway damage is easy to produce,the roof of a circular tunnel crack,the maximum principal stress of circular tunnel and the distribution of shear stress are shown on the right direction under the earthquake effect The maximum principal stress of arch roadway is on the right side and the distribution of shear stress and the two corner roof and arched tunnel are easily damaged Strengthening and anti-seismic measures to the weak strength of the roadway will improve the seismic performance of roadway in the seismic design of roadway