深部软岩巷道锚注支护技术研究

Research of bolt grouting support technology for deep soft rock roadway

以-650斜井一号交岔点为工程背景,通过数值模拟方法,提出以内注浆锚杆为核心、以主动支护取代传统的被动性支护的"锚注法支护体系",解决了深部软岩及破碎带内支护难的问题。研究表明:锚注支护在多种支护形式基础上利用锚注进行二次支护,有效地改善巷道围岩的应力分布情况,同时,围岩的支护承载能力得到显著提高,为支护结构的长期稳定提供了保障。

By means of numerical simulation, the bolt-grouting support system with inner grouting bolt as the core is pro- posed to replace the traditional passive support system,which can solve the support problems in deep soft rock and fractured zone. The research shows that the bolt-grouting support can effectively improve the stress distribution of the surrounding rock of the roadway and significantly increase the supporting capacity of the surrounding rock, which provides a guarantee for the long-term stability of the supporting structure.