underground mined-out area

• 地下采空区

underground mined-out area的用法和样例：

例句

1. The land subsidence caused by abandoned underground mines has been a kind of typical geological disaster and influenced troublefree operation of engineering construction severely.
   由废弃的地下采空区引起的地面沉陷，已成为一种典型的地质灾害，严重影响工程建设的顺利进行。