大埋深软岩巷道梁结构破坏与支护研究

Study on Structural Failure and Support of Large Depth Soft Rock Roadway

对于大埋深巷道,在较小的锚杆预紧力作用下,软岩巷道围岩从固支梁结构破坏变形成为铰支梁结构的过程中,围岩因为发生位移而产生较大的变形。也就是说,锚杆支承作用的充分发挥是以牺牲围岩的变形量为代价的。因此,锚杆、锚索的预紧力对于维护软岩巷道的整体性至关重要。通过数值模拟再次证明了施加高预紧力对控制巷道围岩变形破坏的重要性。

For the large depth roadway, under the action of the small anchor preload, the soft rock roadway surrounding rock from the deformation of the fixed support beam structure of the hinged beam structure, the displacement of the surrounding rock due to displacement and greater deformation . In other words, the full play of the bolt support is at the expense of the amount of deformation of the surrounding rock. Therefore, the pretension of the anchor cable is very important to maintain the integrity of the soft rock roadway. And the importance of applying high pretightening force to control the deformation and failure of surrounding rock is proved by numerical simulation.