应力集中区过断层巷道超前裸注联合支护技术研究

Research on Advanced Bare-wall Grouting Combined Support Technology for Roadway Crossing Fault in Stress Concentration Area

为有效控制煤柱应力集中区过断层带的巷道围岩变形,提出在不喷浆封闭巷道壁面的情况下,通过超前小导管注浆,并采用36U型钢+锚索协同承载的支护方案,既提高了巷道过断层区域围岩的完整性与强度,又充分发挥锚索支护的主动性及联合承载整体效能。通过巷道稳定性分析、科学监控量测,表明巷道围岩变形能够得到有效控制,为类似的工程提供了技术参考。

In order to effectively control the surrounding rock deformation of roadway passing through fault zone in stress concentration area of coal pillar, the supporting scheme of advanced small pipe grouting combined with 36U steel + anchor cable cooperative bearing is proposed without grouting to close roadway wall. It not only improves the integrity and strength of surrounding rock in roadway crossing fault area, but also gives full play to the initiative of anchor cable support and the overall performance of joint bearing. Through roadway stability analysis and scientific monitoring measurement,it shows that roadway surrounding rock deformation can be effectively controlled, which provides technical reference for similar projects.