tailings impoundment

例句：

1. 1. The company has been storing tailings in the underground facility for several years.
   该公司已在地下设施中储存尾矿多年。
2. 2. The tailings impoundment is a critical environmental issue that needs to be addressed urgently.
   尾矿库是一个紧迫的环境问题，需要紧急解决。
3. 3. The tailings impoundment poses significant risks to human health and the environment.
   尾矿库对人类健康和环境构成重大风险。