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.

以无底柱为代表的崩落矿法中,割拉槽至关重要,而目前无底柱矿用垂直割天井与割平巷并配以中深拉槽的割方法,但该方法在对矿体上盘回过程中损失贫化较。