downward mining

基本解釋

The indoor experiment on the filling materials used for downward slicing drift mining with cemented backfill in Gaolong Gold Mine was performed.
對高龍金礦下向分層進路膠結充填采礦法所用的充填材料進行了室內(nèi)試驗研究。
Some experiences were introduced on the use of the puppet downward quadrilateral pliant shield support mining in Xiancha Coal Industry Company in more than a year.
介紹仙槎煤業(yè)公司一年多時間使用偽俯斜四邊形柔性掩護支架采煤法的體會。
A steeply inclined downward running ribbed belt conveyor is developed according to the funnel layout at Xieyi coal mine in Huainan to meet the demand in coal mining with inclined coal bed.
為適應傾斜煤層開采的需要，結合淮南謝一煤礦巷道布置，研制了一臺大傾角下運花紋帶式輸送機。