rock fall disaster

• 崩塌地质灾害

rock fall disaster的用法和样例：

例句

1. Rock avalanches originate on over-steepened slopes in weak rocks.
   岩石崩塌起源于陡峭的高坡上不牢固的岩石。
2. Steep topography, fissured rocks and fossil stalactites are favorable to rock-fall disaster.
   近年来，冠岩发生了几起危岩崩塌事故。