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矿法中,切拉重要,而目前无底柱矿大多用垂直切与切平巷并配以中深孔联合拉的切方法,但该方法在对矿体上盘回过程中损失贫化较大。