2302工作面主回撤通道锚-梁-注综合控制技术研究

Research on the Comprehensive Control Technology of Anchor-Beam-Injection in the Main Withdrawal Channel of the 2302 Working Face

东于煤业2302特厚煤层工作面主回撤通道发生严重变形破坏,对破坏特征进行现场监测和数值模拟研究,提出锚-梁-注综合控制技术。末采期间主回撤通道顶板变形量、两帮变形量、底鼓量降低57%、65%、45%以上,围岩变形量大幅度减小,围岩巷道稳定性较好,保障了工作面安全回撤。

The main withdrawal channel of the 2302 extra thick coal seam working face in Dongyu Coal Industry experienced severe deformation and failure.Conduct on-site monitoring and numerical simulation research on the failure characteristics,and a comprehensive control technology of anchor-beam-injection is proposed.During the final mining period,the roof deformation amount,two sides deformation amount,and the bottom heave amount of the main withdrawal channel are reduced by more than 57%,65%,and 45%.The deformation amount of the surrounding rock is significantly reduced,and the stability of the surrounding rock roadway is good,ensuring the safe withdrawal of the working face.