隧道工程施工期围岩松动圈的测试与判定,对于施工支护设计具有重要作用。地震折射层析法是测试围岩松动圈的较为有效的方法。通过对乌鞘岭隧道大变形围岩松动圈测试与分析,明确了乌鞘岭隧道穿越F7断层带地段的围岩松动圈范围,指导了该段隧道的开挖支护施工。 The testing and judgment of the loose ring of surrounding rock during the construction of tunnel project plays an important role in the construction support design. Seismic refraction tomography is a more effective method to test the loose ring of surrounding rock. Through the test and analysis of the loose ring of the large deformed surrounding rock in Wushaoling Tunnel, the scope of the loose ring of surrounding rock of Wushaoling Tunnel through the section of F7 fault is clarified, and the excavation and support construction of the tunnel is guided.