In this thesis, according to the condition of Mujia Hill, the method of roof cutting and ore pillar dilapidation is proposed.

提出用切顶与矿柱崩落法处理木架山采空区。

youdao

In this thesis, according to the condition of Mujia Hill, the method of roof cutting and ore pillar dilapidation is proposed.

提出用切顶与矿柱崩落法处理木架山采空区。

youdao