Xining, June 5 (Reporters learned on the evening of the 4th from relevant departments in Haidong City, Qinghai Province) that on that day, a collapse occurred about 3 kilometers from the right-tube exit of the Huzhu Beishan Extra-Long Tunnel on the Qinghai Jiaxi Highway, leaving 3 people missing. At present, Haidong City and Huzhu County in Qinghai Province have established a joint command headquarters at the two levels to carry out emergency response work at full capacity.

　　At the rescue site, 269 rescue personnel from emergency response, firefighting, public security and other teams have been deployed, along with 14 pieces of rescue machinery and vehicles, including excavators, loaders, dump trucks and ambulances. Among them, the Haidong City Fire and Rescue Detachment dispatched 18 vehicles, 70 people and 6 dogs to participate in the rescue.

　　According to reporters, the rescue site is currently mainly carrying out debris clearing and stabilization work, and about 600 cubic meters of collapsed rock and debris have been cleared.

The photo shows the rescue site.

　　The Huzhu Beishan Extra-Long Tunnel is located in Huzhu Tu Autonomous County, Qinghai Province, starting at Yuanfugou and ending at Baimuxiakou. The tunnel has a total length of 11,177 meters and is the longest highway tunnel under construction or already built in Qinghai Province, as well as a controlling project of the Qinghai Jiaxi Highway.

　　The tunnel passes through the Huzhu Beishan National Forest Park and Geopark and is located in an ecologically highly sensitive area. The maximum buried depth of the tunnel floor is 769 meters, with high ground stress and large deformation, and it also passes through 7 fault fracture zones. The geological conditions are complex and variable, and the construction risk is high and the difficulty is great.