When long wall mining to the dip in fully-mechanized coal winning working face is inclined area, we may can't use existing drift draw off water.
当倾斜长壁开采的综放工作面初采范围处于向斜构造区，造成初采放水无法利用已有巷道形成自流放水，必须考虑动力排水或其他的放水方式。
When long wall mining to the dip in fully-mechanized coal winning working face is inclined area, we may can't use existing drift draw off water.
当倾斜长壁开采的综放工作面初采范围处于向斜构造区，造成初采放水无法利用已有巷道形成自流放水，必须考虑动力排水或其他的放水方式。
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