上盘

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.

以无底柱为代表的崩落采矿法中,切割拉槽至关重要,而目前无底柱采矿大多采用垂直切割天井与切割平巷并以中深孔合拉槽的切割方法,但该方法在对矿体上盘回采过程中损失贫化较大。