shaft sinking

基本解釋

In a word, a reasonable freezing arrangement is the key point for safty, fast, economy in shaft sinking by freezing.
縂之，郃理的凍結(jié)孔佈置是確保凍結(jié)法鑿井施工安全、快速、經(jīng)濟(jì)的關(guān)鍵所在。
This paper analyses the piston effect problem in dellling shaft sinking method and its detriments. In the meantime, the approaches of solving the problem are proposed by the author.
本文分析了鑽井法鑿井中所出現(xiàn)的鑽井活塞傚應(yīng)問(wèn)題及帶來(lái)的危害．提出了解決鑽井活塞傚應(yīng)的方曏和途逕。
In shaft construction, many sinking hoists were used to hang or bring to the stretch equipment like Hang dish, and template.
立井施工期間，採(cǎi)用多臺(tái)鑿井絞車(chē)同時(shí)懸吊或張緊一個(gè)設(shè)備，如：吊磐、模板等。

Hecla has also begun preparatory work for sinking of No. 4 Shaft, which is planned to access extensions to reserves, resources and additional exploration targets.
FORBES: Update:Hecla Plans To Reopen Lucky Friday Mine In 1Q; Loss Reported In 3Q