摘要
为有效控制煤矿巷道围岩变形,提出了预应力桁架锚索支护方案,利用有限差分软件FLAC进行了数值模拟,优化了桁架锚索角度、长度及锚索孔口与煤帮距离,并将研究结果应用于现场实践中,顶板下沉量被控制在120 mm以内,表明桁架锚索能有效抑制巷道围岩的变形破坏。
Prestress truss cables are raised to control the deformation of the surrounding rock effectively. Angle,length and distance between orifice and coal side of truss cable are optimized by FLAC. Research results were used in filed practice,roof convergence was controlled within120 mm. Practice shows that prestress truss cable can inhibit the deformation and failure of surrounding rock masses.
出处
《山西建筑》
2016年第3期60-61,共2页
Shanxi Architecture
关键词
巷道
桁架锚索
预应力
破碎顶板
数值模拟
alley
truss cable
prestress
broken roof
numerical simulation
