四台矿复合顶板锚网索支护技术应用

针对复合顶板条件下巷道变形严重的问题,本文以四台矿51024巷的掘进为背景,采用FLAC3D软件模拟分析软弱夹层对于巷道围岩稳定性的影响。结果表明,软弱夹层位于锚杆锚固区时,锚杆支护效果较差,据此设计增加锚索密度来保证支护强度,采用分类支护的方式控制围岩,现场应用试验过程中矿压监测结果表明,51024巷掘进期间围岩稳定,支护效果显著。

Research and Application of Cable Anchor Support Technology for Composite Roof in Sitai Coal Mine

Aiming at the problem of serious deformation of the roadway under the condition of composite roof,taking the tunneling of 51024 roadway in Sitai Mine as the background,the paper uses FLAC3D software to simulate and analyse the influence of weak interlayers on the stability of the roadway surrounding rock.Results show that when the weak interlayer is located in the anchorage area,the bolt support effect is poor.According to this design,the anchor cable density is increased to ensure the support strength,and the surrounding rock is controlled by the classification support method.