“内-外复合承载结构”支护技术在软岩巷道围岩控制中的应用

Application of inner-outer composite bearing structure supporting technology in surrounding rock control of soft rock roadway

为控制刘园子煤矿巷道围岩强烈流变现象,保证长期稳定性,采用现场测试、数值模拟、井下试验及矿压观测的方法,综合分析原支护下围岩变形破坏特征及原因,提出"内-外复合承载结构支护技术"并应用于软岩巷道支护实践中。矿压监测结果表明,应用该技术后,锚杆受力稳定,巷道围岩位移较小,无明显离层现象,围岩稳定性增强,对类似条件下软岩巷道治理提供一定借鉴意义。

In order to control the intensive rheological phenomenon of roadway surrounding rock in Liuyuanzi Coal Mine and ensure the long-term stability, field test, numerical simulation, underground test and mine pressure observation method were used to analyze the characteristics and reasons of surrounding rock deformation and failure under original support, inner-outer composite bearing supporting technology was proposed and applied in soft rock roadway. Mine pressure monitoring results showed that after application of the applied technology, bolt stress were stable, displacement of surrounding rock was small, there was no obvious senaration phenomenon, the surrounding rock stabilitv was nromoted.