深井高应力巷道围岩强力-分次支护协调控制技术研究

为解决深井高应力巷道围岩变形破坏问题，结合强力支护理论及巷道围岩变形与支护时机关系分析了深井巷道强力-分次支护的力学机制，提出了一次锚网喷、二次全断面锚注配合底板鸟笼锚索相协调的强力-分次支护技术，现场应用实现了深井巷道围岩变形可控。结果表明：随一次强力支护时间延长，深井巷道围岩变形速度先降低后变缓再突然增加，二次支护的最优时机为围岩变形速度变缓阶段。

Powerful and multi support coordinated control technology of high stress surrounding rockin deep coal mine roadway

In order to solve serious deformation and failure problem of high stress roadway in deep coal mine, combining with powerful support theory and the relationship between time-dependent deformation and support time of surrounding rock, the powerful and multi support mechanical mechanism of roadway in deep coal mine was analyzed. And the powerful and multi support technology of the primary bolting and guniting support coordinating with the second fullface anchoring + grouting and floor birdcage anchors support was provided. Then the deformation of roadway surrounding rock was controllable in field application. The results show that: the deformation velocity of surrounding rock reduces first, and then changes slowed down, and suddenly increases finally, the second optimum support time is at the slowed down period of the deformation velocity for surrounding rock.