大变形锚杆索协调防冲支护的理论研究

在强冲击大变形巷道支护中,锚杆、锚索是否联合协调防冲支护,不仅关系巷道在施工期间的安全,还直接影响巷道支护的长期安全性。结合锚杆、锚索联合对强冲击大变形巷道进行支护时容易普遍出现锚杆、锚索破断的问题,介绍了适合于强冲击大变形巷道支护的大变形锚杆(索)的主要结构特点及其让压性能,并对锚杆、锚索协调防冲原理和设计准则进行了研究分析。在此基础上,通过对大变形锚杆(索)的实验研究,给出了不同冲击条件下大变形锚杆(索)实验设计方法。研究结果对今后强冲击大变形巷道的支护设计施工有一定的参考价值。

The Study on Coordination for Avoiding Impact Using Bolt and Anchor Cable with Large Deformation

Under the roadway support of large deformation caused by strong impact,it could be safety when bolt coordinates with anchor cable on anti-rockburst supporting.That kind of support not only re-lates with the safety during construction,but also influences the long-term safety of roadway support.When bolt and anchor cable union support the roadways with large deformation is used in condition of strong impact,the bolt and anchor cable will be easily destroyed.So the paper introduces the main construction and yield pressure features about the large deformation bolt(anchor cable)suited to the roadways with large deformation caused by strong impact.The coordination of anti-rockburst principle and design criteria of the research about bolt and anchor support has been analyzed at the same time.On the base of experimental research of the large deformation of bolt(anchor cable),the experimental de-sign method under different impact conditions have been given.Research result has certain reference value to the support design construction of the roadways with large deformation caused by strong im-pact.