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在现有锚杆支护巷道围岩稳定性研究的基础上,提出了通过锚杆工作荷载评估巷道围岩稳定性的设想。采用物理相似模拟的方法对其进行了实验研究。根据巷道围岩控制理论和实验研究结果,分析了承载条件下巷道周边围岩变形特征;揭示了在巷道加载破坏过程中,锚杆工作荷载随巷道围岩变形位移的演化规律;重点研究了在巷道变形、失稳、破坏各阶段中锚杆工作荷载与围岩表面位移的相关性,并建立了其对应关系。利用这一对应关系,通过锚杆工作荷载的无损检测实现对巷道围岩稳定性的判断和评估,为现场实时分析和评价巷道围岩稳定性及其支护结构的合理性提供了必要的理论与技术支持。
Based on the research on the stability of the surrounding rock in the existing bolt supporting roadway, the idea of using the working load of the rock bolt to evaluate the stability of the surrounding rock in the roadway is put forward. It is experimentally studied by the method of physical analogy. According to the surrounding rock control theory and experimental research results, the deformation characteristics of the surrounding rock around the roadway under load are analyzed. The evolution of the working load of the rock bolt along with the deformation and displacement of surrounding rock is revealed when the roadway is damaged. Roadway deformation, instability and failure in various stages of the bolt load and surface rock displacement correlation and establish their correspondence. By using this correspondence, the judgment and assessment of the surrounding rock stability of the roadway can be achieved by non-destructive testing of the working load of the rock bolt, which provides the necessary theory for the real-time analysis and evaluation of the surrounding rock stability and the rationality of its supporting structure. With technical support.