kerve

1.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法中,至关重要,而目前无底柱采大多采用垂直天井与平巷并配以中深孔联合的方法,但该方法在上盘回采过程中损失贫化较大。