铁山隧道采空区处理

Worked out Area Treatment in Tie Hill Tunnel

采空区是隧道施工的一大难点，处理的好坏直接影响到施工及运营安全。根据采空区的特征，介绍了采空区处理的方法，以便同类工程施工参考。

Worked out area encountered in tunnelling is a big problem to construction. If the worked out area is unproperly treated,the tunnel excavation and later operation will be affected. In the view of the character of worked out area,this paper introduces the treatment method of worked out area so as to give a reference to similar projects.