摘要
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 deformation law of surrounding rock of different roadway widths, this article analyzed deformation characteristics of surrounding rock by using numerical simulation when the roadway width was 3 to 8 m. The displacement of surrounding rock increases with increasing width of the roadway, the displacement increases obviously when roadway widths is greater than a certain critical width, the surrounding rock moves integrally and occurs separation. The middle roof and upper roadside of extrawide roadway is the key part of surrounding rock control. High prestressed bolt anchor support technology is used for specific geological conditions and deformation characteristics of surrounding rock of different roadway width. Field monitoring results show that the deformation of surrounding rock has been effectively controlled.
出处
《煤矿安全》
CAS
北大核心
2014年第7期70-73,共4页
Safety in Coal Mines
基金
中国博士后基金资助项目(2013M531495)
关键词
超宽巷道
变形特征
失稳
临界宽度
高预应力
支护技术
extrawide roadway
deformation characteristic
instability
critical width
high prestressed
support technology
