论文部分内容阅读
为获得巷道宽度对围岩变形特征的影响规律,采用数值模拟的方法分析了巷道宽度3～8 m时围岩变形特征。巷道围岩位移随巷道宽度的增加逐渐增加,大于某一临界宽度后,位移明显增大,围岩出现整体移动的趋势,产生离层,得出了顶板中部和巷帮中上部是超宽巷道围岩控制的关键部位。针对具体的地质条件和不同巷道宽度围岩的变形特征,采用高预应力锚杆锚索支护技术进行支护,现场监测结果表明巷道围岩变形得到了有效的控制。
In order to obtain the influence law of the width of surrounding rock on the deformation characteristics of surrounding rock, the deformation characteristics of surrounding rock with width of 3 ~ 8 m are analyzed by numerical simulation. The displacement of surrounding rock of the roadway increases with the increase of the width of the roadway. When it is larger than a certain critical width, the displacement increases obviously and the overall movement of the surrounding rock shows a trend of separation, resulting in that the middle part of the roof and the upper part of the roadway are ultra- Surrounding rock control of the key parts. According to the specific geological conditions and the deformation characteristics of surrounding rock with different width of roadway, high prestressed anchor and anchor cable support technology is used to support. The field monitoring results show that the surrounding rock deformation of the roadway has been effectively controlled.