This paper introduced a new method for it, ie continuous stoping of room and pillar in stages and to fill mined bed with falling roof by deep-hole blasting.
本文提出了一种矿房矿柱阶段性连续回采，深孔放顶处理空区的采矿方法。
You'll come to a broken part of the roof and you cannot jump, just go into the room to the right and you come back to the roof again, make your way to the right to get out of this place.
你会来到一个破损的房顶但是你不能往下跳，你只能进入房间往右走，然后又回到了房顶。 然后想办法从右边离开这里。
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