downward mining

基本解释

The indoor experiment on the filling materials used for downward slicing drift mining with cemented backfill in Gaolong Gold Mine was performed.
对高龙金矿下向分层进路胶结充填采矿法所用的充填材料进行了室内试验研究。
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.
介绍仙槎煤业公司一年多时间使用伪俯斜四边形柔性掩护支架采煤法的体会。
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.
为适应倾斜煤层开采的需要，结合淮南谢一煤矿巷道布置，研制了一台大倾角下运花纹带式输送机。