摘要
通过FLAC3D数值模拟计算,研究了锚索桁架的预应力场分布及其对顶板围岩应力场的影响规律。与单体锚索相比,锚索桁架系统形成的预应力场能够更好地覆盖巷道跨中位置,作用范围更大。锚索桁架能够很好地改善围岩应力场分布,形成的压力拱厚度是单体锚索的1.6倍左右,对大断面巷道具有很好的控制效果。
Based on the FLAC3D numerical simulation calculation; the prestress field distribution of anchor cable truss and the influence on the surrounding rock stress were studied. The prestress field made by anchor cable truss can cover the middle position of roadway with a larger influence scope. The surrounding rock stress field is improved by the anchor cable truss. The thickness of pressure arch formed by anchor cable truss is about 1.6 times of that for traditional independent anchor cable, which shows a better control effect to the large scale roadway.
出处
《煤炭技术》
北大核心
2017年第12期24-27,共4页
Coal Technology
关键词
锚索桁架
巷道支护
预应力
围岩应力
anchor cable truss
roadway support
prestress
surrounding rock stress
