基于非对称变形围岩的锚杆支护策略研究

Strategy Research on Bolt Support Based on Surrounding Rock of Asymmetric Deformation

深部穿层巷道的高地应力引起了巷道围岩的非对称变形,结合FLAC^(3D)数值模拟结果,针对这种非对称变形做了深入的破坏机理分析,提出了相应的非对称变形控制对策--锚网索+底角锚杆的非对称耦合支护,对非对称变形发生的关键部位实施了相应的加强支护方案。从监测结果来看,实施改进的支护方案后巷道围岩变形协调均匀,有效地控制了深部巷道围岩的非对称变形。

The high ground stress of the deep roadway caused the asymmetric deformation of the roadway surrounding rock. This paper performed a deep failure mechanism analysis on that asymmetric deformation, which is based on the FLAC3D numerical simulation. Thereafter, proposed the accordant asymmetric control countermeasure, which is asymmetry coupling support by cable anchor and floor anchor. Also, formed the accordant strengthen support scheme for the key part that would easily get asymmetric deformation. Judging from the monitoring results, after the implementation of support schemes, the deformation of roadway surrounding rock became uniformity, effectively controlled the asymmetric deformation of surrounding rocks in deep roadway.