loose-rock excavation

例句：

1. 1.The team used a special tool to loosen the rocks before starting the excavation.
   团队使用一种特殊工具在开始开挖前松动岩石。
2. 2. The engineer carefully planned the loose-rock excavation to ensure safety.
   工程师仔细规划了松散岩石开挖以确保安全。
3. 3. The construction company was criticized for its poor quality of loose-rock excavation work.
   建筑公司因其松散岩石开挖工作质量差而受到批评。