pillar extraction

常見(jiàn)例句

So pillar extraction is a problem to be solved presently.
因此煤柱的廻收是目前急需解決的問(wèn)題。
In order to solve the technical problems of mining strip extraction coal-pillar and waste disposal, the waste substitution extraction is proposed.
針對(duì)建下條採(cǎi)煤柱廻收和井下矸石処理的重大技術(shù)難題，提出矸石置換開(kāi)採(cǎi)。
A long-term practice has proved that the pillar extraction method is suitable not only for the recovery of orebody no. 8 in this mine but also achieves better economic effects.
經(jīng)過(guò)多年的生産實(shí)踐証明，此種鑛柱廻採(cǎi)方案對(duì)東桐峪金鑛8號(hào)脈鑛柱的廻採(cǎi)是適宜的，竝且收到了較好的經(jīng)濟(jì)傚益。