kerve

Since the method causes serious depletion of ore during mining of upper plate,the inclined cutting raise heading together with inclined medium or deep hole kerve is suggested.

以无柱为代表的崩落采矿法中,割拉至关重要,而目前无柱采矿大多采用垂直割天井与割平巷并配以中深孔合拉的割方法,但该方法在对矿体上盘回采过程中损失贫化较大。