摘要
锚杆横肋间距设计是锚杆杆体外型优化的主要研究方向,在不同岩性的岩体中,通过优化锚杆横肋间距,达到增强岩体稳定性的目的。通过GTS/NX-FLAC^(3D)耦合建模手段,建立几何模型并划分网格,模拟煤矿岩体中锚杆的锚固状态。经数值模拟计算,得出锚杆横肋间距变化对软岩、中硬岩、硬岩3种岩性不同的岩体稳定性的影响及岩体中锚杆拉伸长度的变化。分析结果表明,在软岩岩体中,选择横肋间距为40 mm的锚杆;在中硬岩巷道中,选择横肋间距为30 mm的锚杆;在硬岩巷道中,选择横肋间距为45 mm的锚杆。
The design of anchor cross rib spacing is the main research direction of bolt shape optimization.In rock mass with different lithology,the purpose of improving rock mass stability can be achieved by optimizing bolt cross rib spacing.Through GTS/NX-FLAC^(3D) coupling modeling method,the geometric model is established and the mesh is divided,and the anchorage state of the anchor bolt in the rock mass is simulated.Through numerical simulation,the influence of bolt cross rib spacing on the stability of soft rock,medium hard rock and hard rock and the change of bolt tensile length in rock mass are studied.The analysis results show that the bolt cross rib spacing should be 40 mm in soft rock roadway,30 mm in medium hard rock roadway and 45 mm in hard rock roadway.
作者
薛应登
殷博超
XUE Yingdeng;YIN Bochao(Shaanxi Coal Group Shennan Industry Development Co. ,Ltd. ,Shenmu 719300,China)
出处
《陕西煤炭》
2021年第6期35-38,共4页
Shaanxi Coal
关键词
数值模拟
锚杆支护
横肋间距
岩体下沉量
numerical simulation
bolt support
cross rib spacing
rock mass subsidence
