A large number of mined-out areas usually formed, in the process of mineral resources exploitation, Open-stope method including breasting mining method, room-and-pillar method and shrinkage mining method were adopted in underground mine.

  • 地下矿山应用全面法、房柱法及留矿法等空场类方法进行矿产资源开采过程中,通常会形成大量的采空区。

  • 互联网摘选 2025-01-20 00:03:37

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