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法中,拉槽至关重要,而目前无底柱多用垂直天井与巷并配以中深孔联合拉槽的法,但该法在对体上盘回过程中损失贫化较。

In mine construction engineering area, Apolune International Limited provide design of vertical shaft, inclined shaft, ventilating shaft, ore pass, drift, tunnel and all kinds of underground chamber.

在井建设工程设计面，远月点国际有限公司提供竖井、斜井、风井、溜井、巷、隧道及各种地下硐室的设计。